# |
PMID |
Sentence |
1 |
1591345
|
Regulation of pulsatile gonadotropin secretion by estrogen, inhibin, and follistatin (activin-binding protein) in ovariectomized rats.
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2 |
1671798
|
The effect of insulin and insulin-like growth factors were examined in closer detail because of the clinical association between insulin and hyperandrogenism.
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3 |
1671798
|
Pituitary hormones and hypothalamic releasing factors, such as human ACTH (10 nM), beta-endorphin (10 nM), beta-lipotropin (10 nM), alpha-MSH (10 nM), gamma 3-MSH (10 nM), ovine luteinizing hormone (10 ng/ml), ovine follicle-stimulating hormone (10 ng/ml), ovine thyroid-stimulating hormone (10 ng/ml), rat growth hormone (10 ng/ml), rat prolactin (10 ng/ml), rat corticotropin-releasing factor (10 nM), luteinizing hormone-releasing factor (10 nM), thyrotropin-releasing factor (10 nM), human growth hormone-releasing factor (10 nM), and somatostatin (10 nM), have no significant effects on aromatase activity.
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4 |
1671798
|
Porcine inhibin A (10 ng/ml) and porcine activin AB (10 ng/ml), two ovarian hormones with structural transforming homology to transforming growth factor-beta, also have no effect on aromatase activity.
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5 |
1671798
|
Although basic fibroblast growth factor (1-100 ng/ml), acidic fibroblast growth factor (1 ng/ml), epidermal growth factor (1 ng/ml), platelet-derived growth factor (1 ng/ml), tumor necrosis factor (1 ng/ml), and transforming growth factor-beta 1 (1 ng/ml) have no effect on basal aromatase activity in human skin fibroblasts, all of these growth factors inhibited the ability of dibutyryladenosine 3',5'-cyclic monophosphate to stimulate aromatase activity.
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6 |
1671798
|
In contrast, both insulin (100 pg/ml-10 ng/ml) and insulin-like growth factor-1 (1-100 ng/ml) had no effect on cAMP-stimulated aromatase but potentiated the action of dexamethasone (100 nM).
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7 |
1671798
|
On the basis of the results presented here, it is interesting to speculate that the hyperandrogenism that is often associated with insulin resistance may be due to a combination of growth factor-mediated inhibition of aromatase activity and the failure of peripheral tissues to respond to insulin and metabolize androgens to estrogens.
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8 |
1883364
|
Follistatin is a monomeric protein originally discovered in ovarian follicular fluid as a suppressor of pituitary follicle-stimulating hormone (FSH) secretion, and later identified as a binding protein for activin.
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9 |
1883364
|
To explore the role of the Asn-linked carbohydrate chains on the follistatin molecule in regard to the inhibition of FSH secretion and activin binding ability, site-specific mutations were introduced at either or both of the two potential Asn-linked glycosylation sites of human follistatin with 315 amino acids (hFS-315).
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10 |
1883364
|
When tested for their ability to inhibit FSH secretion and to bind activin, each mutant was found to have a similar property as the non-mutated recombinant hFS-315, suggesting that glycosylation of the follistatin molecule has no effect in these functions.
|
11 |
1883364
|
Follistatin is a monomeric protein originally discovered in ovarian follicular fluid as a suppressor of pituitary follicle-stimulating hormone (FSH) secretion, and later identified as a binding protein for activin.
|
12 |
1883364
|
To explore the role of the Asn-linked carbohydrate chains on the follistatin molecule in regard to the inhibition of FSH secretion and activin binding ability, site-specific mutations were introduced at either or both of the two potential Asn-linked glycosylation sites of human follistatin with 315 amino acids (hFS-315).
|
13 |
1883364
|
When tested for their ability to inhibit FSH secretion and to bind activin, each mutant was found to have a similar property as the non-mutated recombinant hFS-315, suggesting that glycosylation of the follistatin molecule has no effect in these functions.
|
14 |
1883364
|
Follistatin is a monomeric protein originally discovered in ovarian follicular fluid as a suppressor of pituitary follicle-stimulating hormone (FSH) secretion, and later identified as a binding protein for activin.
|
15 |
1883364
|
To explore the role of the Asn-linked carbohydrate chains on the follistatin molecule in regard to the inhibition of FSH secretion and activin binding ability, site-specific mutations were introduced at either or both of the two potential Asn-linked glycosylation sites of human follistatin with 315 amino acids (hFS-315).
|
16 |
1883364
|
When tested for their ability to inhibit FSH secretion and to bind activin, each mutant was found to have a similar property as the non-mutated recombinant hFS-315, suggesting that glycosylation of the follistatin molecule has no effect in these functions.
|
17 |
1909791
|
Follistatin and activin: a potential intrinsic regulatory system within diverse tissues.
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18 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
19 |
2036994
|
Inhibin, activin, and follistatin are three families of polypeptides originally isolated and characterized from ovarian follicular fluid based on their modulation of FSH release from pituitary cell culture.
|
20 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
21 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
22 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
23 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
24 |
2036994
|
Inhibin, activin, and follistatin are three families of polypeptides originally isolated and characterized from ovarian follicular fluid based on their modulation of FSH release from pituitary cell culture.
|
25 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
26 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
27 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
28 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
29 |
2036994
|
Inhibin, activin, and follistatin are three families of polypeptides originally isolated and characterized from ovarian follicular fluid based on their modulation of FSH release from pituitary cell culture.
|
30 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
31 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
32 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
33 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
34 |
2036994
|
Inhibin, activin, and follistatin are three families of polypeptides originally isolated and characterized from ovarian follicular fluid based on their modulation of FSH release from pituitary cell culture.
|
35 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
36 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
37 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
38 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
39 |
2036994
|
Inhibin, activin, and follistatin are three families of polypeptides originally isolated and characterized from ovarian follicular fluid based on their modulation of FSH release from pituitary cell culture.
|
40 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
41 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
42 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
43 |
2121404
|
The closed-loop feedback mechanism of ovarian inhibin and pituitary FSH has been joined by possible "inhibin-like" actions of follistatin and FSH-stimulatory effects of activin.
|
44 |
2121404
|
Figure 3 shows a simplistic diagram summarizing our current understanding of inhibin/activin and follistatin action along the hypothalamic-pituitary-gonadal axis.
|
45 |
2121404
|
The closed-loop feedback mechanism of ovarian inhibin and pituitary FSH has been joined by possible "inhibin-like" actions of follistatin and FSH-stimulatory effects of activin.
|
46 |
2121404
|
Figure 3 shows a simplistic diagram summarizing our current understanding of inhibin/activin and follistatin action along the hypothalamic-pituitary-gonadal axis.
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47 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
48 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
49 |
7887917
|
This finding implies that the carboxylterminal 27 amino acid extension of rhFS-315, which is not present in rhFS-288, affects the binding of follistatin with activin.
|
50 |
7887917
|
These data suggest for the first time that these two structurally related follistatin molecules interact with activin by different modes of binding and, in the presence of heparin, the interaction of rhFS-288 with activin is indistinguishable from that of rhFS-315.
|
51 |
7887917
|
These findings suggest that the heparin binding site of follistatin also contributes to its binding for activin, and heparin may play an important role in the bioactivity of follistatin.
|
52 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
53 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
54 |
7887917
|
This finding implies that the carboxylterminal 27 amino acid extension of rhFS-315, which is not present in rhFS-288, affects the binding of follistatin with activin.
|
55 |
7887917
|
These data suggest for the first time that these two structurally related follistatin molecules interact with activin by different modes of binding and, in the presence of heparin, the interaction of rhFS-288 with activin is indistinguishable from that of rhFS-315.
|
56 |
7887917
|
These findings suggest that the heparin binding site of follistatin also contributes to its binding for activin, and heparin may play an important role in the bioactivity of follistatin.
|
57 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
58 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
59 |
7887917
|
This finding implies that the carboxylterminal 27 amino acid extension of rhFS-315, which is not present in rhFS-288, affects the binding of follistatin with activin.
|
60 |
7887917
|
These data suggest for the first time that these two structurally related follistatin molecules interact with activin by different modes of binding and, in the presence of heparin, the interaction of rhFS-288 with activin is indistinguishable from that of rhFS-315.
|
61 |
7887917
|
These findings suggest that the heparin binding site of follistatin also contributes to its binding for activin, and heparin may play an important role in the bioactivity of follistatin.
|
62 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
63 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
64 |
7887917
|
This finding implies that the carboxylterminal 27 amino acid extension of rhFS-315, which is not present in rhFS-288, affects the binding of follistatin with activin.
|
65 |
7887917
|
These data suggest for the first time that these two structurally related follistatin molecules interact with activin by different modes of binding and, in the presence of heparin, the interaction of rhFS-288 with activin is indistinguishable from that of rhFS-315.
|
66 |
7887917
|
These findings suggest that the heparin binding site of follistatin also contributes to its binding for activin, and heparin may play an important role in the bioactivity of follistatin.
|
67 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
68 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
69 |
7887917
|
This finding implies that the carboxylterminal 27 amino acid extension of rhFS-315, which is not present in rhFS-288, affects the binding of follistatin with activin.
|
70 |
7887917
|
These data suggest for the first time that these two structurally related follistatin molecules interact with activin by different modes of binding and, in the presence of heparin, the interaction of rhFS-288 with activin is indistinguishable from that of rhFS-315.
|
71 |
7887917
|
These findings suggest that the heparin binding site of follistatin also contributes to its binding for activin, and heparin may play an important role in the bioactivity of follistatin.
|
72 |
8333840
|
Differential control of activin, inhibin and follistatin proteins in cultured rat granulosa cells.
|
73 |
8333840
|
Follistatin, activin and inhibin proteins are produced by granulosa cells, but the mechanisms controlling their production remain unclear.
|
74 |
8333840
|
Here, we examined how the protein kinase A (PKA) and protein kinase C (PKC) pathways act and interact to regulate production of these proteins.
|
75 |
8333840
|
Conditioned media were assayed for inhibin and activin by ligand blotting using recombinant human 125I-follistatin and for follistatin by double ligand blotting using cold activin plus 125I-follistatin.
|
76 |
8333840
|
In contrast, GnRH and TPA stimulated activin, and to a lesser degree, inhibin production; significantly, this is the first demonstration of activin dimer production by granulosa cells.
|
77 |
8333840
|
Differential control of activin, inhibin and follistatin proteins in cultured rat granulosa cells.
|
78 |
8333840
|
Follistatin, activin and inhibin proteins are produced by granulosa cells, but the mechanisms controlling their production remain unclear.
|
79 |
8333840
|
Here, we examined how the protein kinase A (PKA) and protein kinase C (PKC) pathways act and interact to regulate production of these proteins.
|
80 |
8333840
|
Conditioned media were assayed for inhibin and activin by ligand blotting using recombinant human 125I-follistatin and for follistatin by double ligand blotting using cold activin plus 125I-follistatin.
|
81 |
8333840
|
In contrast, GnRH and TPA stimulated activin, and to a lesser degree, inhibin production; significantly, this is the first demonstration of activin dimer production by granulosa cells.
|
82 |
8333840
|
Differential control of activin, inhibin and follistatin proteins in cultured rat granulosa cells.
|
83 |
8333840
|
Follistatin, activin and inhibin proteins are produced by granulosa cells, but the mechanisms controlling their production remain unclear.
|
84 |
8333840
|
Here, we examined how the protein kinase A (PKA) and protein kinase C (PKC) pathways act and interact to regulate production of these proteins.
|
85 |
8333840
|
Conditioned media were assayed for inhibin and activin by ligand blotting using recombinant human 125I-follistatin and for follistatin by double ligand blotting using cold activin plus 125I-follistatin.
|
86 |
8333840
|
In contrast, GnRH and TPA stimulated activin, and to a lesser degree, inhibin production; significantly, this is the first demonstration of activin dimer production by granulosa cells.
|
87 |
8333840
|
Differential control of activin, inhibin and follistatin proteins in cultured rat granulosa cells.
|
88 |
8333840
|
Follistatin, activin and inhibin proteins are produced by granulosa cells, but the mechanisms controlling their production remain unclear.
|
89 |
8333840
|
Here, we examined how the protein kinase A (PKA) and protein kinase C (PKC) pathways act and interact to regulate production of these proteins.
|
90 |
8333840
|
Conditioned media were assayed for inhibin and activin by ligand blotting using recombinant human 125I-follistatin and for follistatin by double ligand blotting using cold activin plus 125I-follistatin.
|
91 |
8333840
|
In contrast, GnRH and TPA stimulated activin, and to a lesser degree, inhibin production; significantly, this is the first demonstration of activin dimer production by granulosa cells.
|
92 |
8462476
|
Follistatin, a monomeric protein originally isolated from ovarian follicular fluid, is now believed to be a major local regulator of the multifaceted actions of activin by virtue of its activin-binding properties.
|
93 |
8472873
|
Structural and functional characterization of the rat follistatin (activin-binding protein) gene promoter.
|
94 |
8472873
|
Follistatin was originally identified as a specific inhibitor of follicle stimulating hormone secretion and later characterized as a binding protein for activin.
|
95 |
8472873
|
Since activin regulates hormone secretion and cell differentiation, the importance of understanding the mechanisms regulating the synthesis of its binding protein, follistatin, is evident.
|
96 |
8472873
|
Co-treatment with forskolin and TPA resulted in a 6.4-fold induction in its promoter activity, suggesting that two distinct signal transduction pathways, the cAMP-dependent protein kinase-A pathway and diacylglycerol-dependent protein kinase-C pathway, act coordinately to modulate follistatin gene transcription.
|
97 |
8472873
|
Structural and functional characterization of the rat follistatin (activin-binding protein) gene promoter.
|
98 |
8472873
|
Follistatin was originally identified as a specific inhibitor of follicle stimulating hormone secretion and later characterized as a binding protein for activin.
|
99 |
8472873
|
Since activin regulates hormone secretion and cell differentiation, the importance of understanding the mechanisms regulating the synthesis of its binding protein, follistatin, is evident.
|
100 |
8472873
|
Co-treatment with forskolin and TPA resulted in a 6.4-fold induction in its promoter activity, suggesting that two distinct signal transduction pathways, the cAMP-dependent protein kinase-A pathway and diacylglycerol-dependent protein kinase-C pathway, act coordinately to modulate follistatin gene transcription.
|
101 |
8472873
|
Structural and functional characterization of the rat follistatin (activin-binding protein) gene promoter.
|
102 |
8472873
|
Follistatin was originally identified as a specific inhibitor of follicle stimulating hormone secretion and later characterized as a binding protein for activin.
|
103 |
8472873
|
Since activin regulates hormone secretion and cell differentiation, the importance of understanding the mechanisms regulating the synthesis of its binding protein, follistatin, is evident.
|
104 |
8472873
|
Co-treatment with forskolin and TPA resulted in a 6.4-fold induction in its promoter activity, suggesting that two distinct signal transduction pathways, the cAMP-dependent protein kinase-A pathway and diacylglycerol-dependent protein kinase-C pathway, act coordinately to modulate follistatin gene transcription.
|
105 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
106 |
8477666
|
For lack of evidence to the contrary, it is now believed that the FSH-suppressing actions of follistatin are due to its ability to bind endogenous pituitary activin.
|
107 |
8477666
|
Therefore, given that follistatin is produced within anterior pituitary tissue, and considering the potentially important function of follistatin to modulate activin bioactivity, we sought to gain insights into the regulation of follistatin gene expression in the anterior pituitary gland of adult female rats.
|
108 |
8477666
|
Because increased steady state follistatin mRNA levels in the latter two instances were associated with selective FSH hypersecretion, and such hypersecretion was previously shown to be dependent to a significant degree on pituitary activin, we next tested the hypothesis that increased pituitary follistatin gene expression is mediated by activin.
|
109 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
110 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
111 |
8477666
|
For lack of evidence to the contrary, it is now believed that the FSH-suppressing actions of follistatin are due to its ability to bind endogenous pituitary activin.
|
112 |
8477666
|
Therefore, given that follistatin is produced within anterior pituitary tissue, and considering the potentially important function of follistatin to modulate activin bioactivity, we sought to gain insights into the regulation of follistatin gene expression in the anterior pituitary gland of adult female rats.
|
113 |
8477666
|
Because increased steady state follistatin mRNA levels in the latter two instances were associated with selective FSH hypersecretion, and such hypersecretion was previously shown to be dependent to a significant degree on pituitary activin, we next tested the hypothesis that increased pituitary follistatin gene expression is mediated by activin.
|
114 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
115 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
116 |
8477666
|
For lack of evidence to the contrary, it is now believed that the FSH-suppressing actions of follistatin are due to its ability to bind endogenous pituitary activin.
|
117 |
8477666
|
Therefore, given that follistatin is produced within anterior pituitary tissue, and considering the potentially important function of follistatin to modulate activin bioactivity, we sought to gain insights into the regulation of follistatin gene expression in the anterior pituitary gland of adult female rats.
|
118 |
8477666
|
Because increased steady state follistatin mRNA levels in the latter two instances were associated with selective FSH hypersecretion, and such hypersecretion was previously shown to be dependent to a significant degree on pituitary activin, we next tested the hypothesis that increased pituitary follistatin gene expression is mediated by activin.
|
119 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
120 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
121 |
8477666
|
For lack of evidence to the contrary, it is now believed that the FSH-suppressing actions of follistatin are due to its ability to bind endogenous pituitary activin.
|
122 |
8477666
|
Therefore, given that follistatin is produced within anterior pituitary tissue, and considering the potentially important function of follistatin to modulate activin bioactivity, we sought to gain insights into the regulation of follistatin gene expression in the anterior pituitary gland of adult female rats.
|
123 |
8477666
|
Because increased steady state follistatin mRNA levels in the latter two instances were associated with selective FSH hypersecretion, and such hypersecretion was previously shown to be dependent to a significant degree on pituitary activin, we next tested the hypothesis that increased pituitary follistatin gene expression is mediated by activin.
|
124 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
125 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
126 |
8477666
|
For lack of evidence to the contrary, it is now believed that the FSH-suppressing actions of follistatin are due to its ability to bind endogenous pituitary activin.
|
127 |
8477666
|
Therefore, given that follistatin is produced within anterior pituitary tissue, and considering the potentially important function of follistatin to modulate activin bioactivity, we sought to gain insights into the regulation of follistatin gene expression in the anterior pituitary gland of adult female rats.
|
128 |
8477666
|
Because increased steady state follistatin mRNA levels in the latter two instances were associated with selective FSH hypersecretion, and such hypersecretion was previously shown to be dependent to a significant degree on pituitary activin, we next tested the hypothesis that increased pituitary follistatin gene expression is mediated by activin.
|
129 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
130 |
8890726
|
Mean +/- SEM values of serum activin A were significantly higher in patients with preterm labor and gestational diabetes than in controls (p < 0.01), showing a significant decrease following insulin therapy in diabetic patients (p < 0.01).
|
131 |
9436357
|
The TGF-beta family, the activin family, and bone morphogenic proteins belong to the TGF-beta superfamily.
|
132 |
9436357
|
Smad family members (Smad 1, Smad 2, Smad 3 and Smad 4) are expressed in the cultured retinal pigmant epithelial cell line (D407), in which TGF-beta and activin A stimulate the translocation of Smad 2, but not Smad 1 into nuclei, whereas bone morphogenetic protein (BMP) stimulates that of Smad 1, but not Smad 2.
|
133 |
9436357
|
The TGF-beta family, the activin family, and bone morphogenic proteins belong to the TGF-beta superfamily.
|
134 |
9436357
|
Smad family members (Smad 1, Smad 2, Smad 3 and Smad 4) are expressed in the cultured retinal pigmant epithelial cell line (D407), in which TGF-beta and activin A stimulate the translocation of Smad 2, but not Smad 1 into nuclei, whereas bone morphogenetic protein (BMP) stimulates that of Smad 1, but not Smad 2.
|
135 |
9524732
|
Regulation of pulsatile secretion of growth hormone (GH) relies on hypothalamic neuronal loops, major transmitters involved in their operation are growth hormone releasing hormone (GHRH) synthetized mostly in arcuate nucleus (ARC) neurons, and somatostatin (SRIH), synthetized both in hypothalamus periventricular (PVe) and ARC neurons. 2.
|
136 |
9524732
|
Other neuropeptides synthetized in ARC neurons, such as galanin, or in ARC interneurons, such as neuropeptide Y (NPY), are able to modulate synthesis and release of GHRH and SRIH into the hypothalamohypophyseal portal system. 3.
|
137 |
9524732
|
At the pituitary level, major neurotransmitters regulating GH cells act on receptors of the VIP/PACAP/GHRH family and of the somatostatin family, in particular, sst2 and sst3.
|
138 |
9524732
|
Regulation and differentiation of somatotropes also depend upon paracrine processes within the pituitary itself and involve growth factors and several neuropeptides, for instance, vasoactive intestinal peptide, angiotensin 2, endothelin, and activin. 10.
|
139 |
10102170
|
Based on data from patients with established disease, with the involvement of various organ systems, potential candidate markers would include renal function (kallikrein-creatinine); coagulation and fibrinolytic systems and platelet activation (platelet volume); markers of vascular function (fibronectin, prostacyclin, thromboxane) and oxidant stress (lipid peroxides, 8-isoprostane, antioxidants, anticardiolipin antibodies, hemoglobin, iron, transferrin, homocysteine, hypertriglyceridemia, albumin isoforms); placental peptide hormones (CRH, CRHbp, activin, inhibin, hCG); vascular resistance (uteroplacental flow velocity waveforms); genetic markers; insulin resistance; and glucose intolerance.
|
140 |
10334306
|
Dexamethasone (Dx) converts them to exocrine cells, whereas activin A (Act) converts them into endocrine cells expressing pancreatic polypeptide.
|
141 |
10334306
|
A combination of Act and betacellulin (BTC) converts them further into insulin-secreting cells.
|
142 |
10853708
|
Previous studies showed that activin A is expressed by insulin-positive B cells of human pancreatic islets, and women with gestational diabetes have higher serum activin A levels than healthy pregnant women at the same gestational age.
|
143 |
10853708
|
The present study aimed to evaluate the effect of activin A on insulin secretion from cultured human pancreatic islets.
|
144 |
10853708
|
In absence of glucose, activin A did not modify insulin secretion at the different concentrations used.
|
145 |
10853708
|
In absence of activin A, 8.3 mM and 16.7 mM glucose significantly increased insulin secretion, with a dose-dependent pattern.
|
146 |
10853708
|
In presence of a non stimulatory concentration of glucose (3.3 mM), activin A significantly increased insulin secretion starting from low concentration (0.1 nM).
|
147 |
10853708
|
Furthermore, the addition of activin A to 8.3 mM and 16.7 mM glucose induced an additional effect of the dose-dependent glucose-mediated insulin secretion (p<0.001).
|
148 |
10853708
|
The present data could support a role for activin A in human endocrine pancreas in modulating insulin response to different glucose concentrations.
|
149 |
10853708
|
Previous studies showed that activin A is expressed by insulin-positive B cells of human pancreatic islets, and women with gestational diabetes have higher serum activin A levels than healthy pregnant women at the same gestational age.
|
150 |
10853708
|
The present study aimed to evaluate the effect of activin A on insulin secretion from cultured human pancreatic islets.
|
151 |
10853708
|
In absence of glucose, activin A did not modify insulin secretion at the different concentrations used.
|
152 |
10853708
|
In absence of activin A, 8.3 mM and 16.7 mM glucose significantly increased insulin secretion, with a dose-dependent pattern.
|
153 |
10853708
|
In presence of a non stimulatory concentration of glucose (3.3 mM), activin A significantly increased insulin secretion starting from low concentration (0.1 nM).
|
154 |
10853708
|
Furthermore, the addition of activin A to 8.3 mM and 16.7 mM glucose induced an additional effect of the dose-dependent glucose-mediated insulin secretion (p<0.001).
|
155 |
10853708
|
The present data could support a role for activin A in human endocrine pancreas in modulating insulin response to different glucose concentrations.
|
156 |
10853708
|
Previous studies showed that activin A is expressed by insulin-positive B cells of human pancreatic islets, and women with gestational diabetes have higher serum activin A levels than healthy pregnant women at the same gestational age.
|
157 |
10853708
|
The present study aimed to evaluate the effect of activin A on insulin secretion from cultured human pancreatic islets.
|
158 |
10853708
|
In absence of glucose, activin A did not modify insulin secretion at the different concentrations used.
|
159 |
10853708
|
In absence of activin A, 8.3 mM and 16.7 mM glucose significantly increased insulin secretion, with a dose-dependent pattern.
|
160 |
10853708
|
In presence of a non stimulatory concentration of glucose (3.3 mM), activin A significantly increased insulin secretion starting from low concentration (0.1 nM).
|
161 |
10853708
|
Furthermore, the addition of activin A to 8.3 mM and 16.7 mM glucose induced an additional effect of the dose-dependent glucose-mediated insulin secretion (p<0.001).
|
162 |
10853708
|
The present data could support a role for activin A in human endocrine pancreas in modulating insulin response to different glucose concentrations.
|
163 |
10853708
|
Previous studies showed that activin A is expressed by insulin-positive B cells of human pancreatic islets, and women with gestational diabetes have higher serum activin A levels than healthy pregnant women at the same gestational age.
|
164 |
10853708
|
The present study aimed to evaluate the effect of activin A on insulin secretion from cultured human pancreatic islets.
|
165 |
10853708
|
In absence of glucose, activin A did not modify insulin secretion at the different concentrations used.
|
166 |
10853708
|
In absence of activin A, 8.3 mM and 16.7 mM glucose significantly increased insulin secretion, with a dose-dependent pattern.
|
167 |
10853708
|
In presence of a non stimulatory concentration of glucose (3.3 mM), activin A significantly increased insulin secretion starting from low concentration (0.1 nM).
|
168 |
10853708
|
Furthermore, the addition of activin A to 8.3 mM and 16.7 mM glucose induced an additional effect of the dose-dependent glucose-mediated insulin secretion (p<0.001).
|
169 |
10853708
|
The present data could support a role for activin A in human endocrine pancreas in modulating insulin response to different glucose concentrations.
|
170 |
10853708
|
Previous studies showed that activin A is expressed by insulin-positive B cells of human pancreatic islets, and women with gestational diabetes have higher serum activin A levels than healthy pregnant women at the same gestational age.
|
171 |
10853708
|
The present study aimed to evaluate the effect of activin A on insulin secretion from cultured human pancreatic islets.
|
172 |
10853708
|
In absence of glucose, activin A did not modify insulin secretion at the different concentrations used.
|
173 |
10853708
|
In absence of activin A, 8.3 mM and 16.7 mM glucose significantly increased insulin secretion, with a dose-dependent pattern.
|
174 |
10853708
|
In presence of a non stimulatory concentration of glucose (3.3 mM), activin A significantly increased insulin secretion starting from low concentration (0.1 nM).
|
175 |
10853708
|
Furthermore, the addition of activin A to 8.3 mM and 16.7 mM glucose induced an additional effect of the dose-dependent glucose-mediated insulin secretion (p<0.001).
|
176 |
10853708
|
The present data could support a role for activin A in human endocrine pancreas in modulating insulin response to different glucose concentrations.
|
177 |
10853708
|
Previous studies showed that activin A is expressed by insulin-positive B cells of human pancreatic islets, and women with gestational diabetes have higher serum activin A levels than healthy pregnant women at the same gestational age.
|
178 |
10853708
|
The present study aimed to evaluate the effect of activin A on insulin secretion from cultured human pancreatic islets.
|
179 |
10853708
|
In absence of glucose, activin A did not modify insulin secretion at the different concentrations used.
|
180 |
10853708
|
In absence of activin A, 8.3 mM and 16.7 mM glucose significantly increased insulin secretion, with a dose-dependent pattern.
|
181 |
10853708
|
In presence of a non stimulatory concentration of glucose (3.3 mM), activin A significantly increased insulin secretion starting from low concentration (0.1 nM).
|
182 |
10853708
|
Furthermore, the addition of activin A to 8.3 mM and 16.7 mM glucose induced an additional effect of the dose-dependent glucose-mediated insulin secretion (p<0.001).
|
183 |
10853708
|
The present data could support a role for activin A in human endocrine pancreas in modulating insulin response to different glucose concentrations.
|
184 |
10853708
|
Previous studies showed that activin A is expressed by insulin-positive B cells of human pancreatic islets, and women with gestational diabetes have higher serum activin A levels than healthy pregnant women at the same gestational age.
|
185 |
10853708
|
The present study aimed to evaluate the effect of activin A on insulin secretion from cultured human pancreatic islets.
|
186 |
10853708
|
In absence of glucose, activin A did not modify insulin secretion at the different concentrations used.
|
187 |
10853708
|
In absence of activin A, 8.3 mM and 16.7 mM glucose significantly increased insulin secretion, with a dose-dependent pattern.
|
188 |
10853708
|
In presence of a non stimulatory concentration of glucose (3.3 mM), activin A significantly increased insulin secretion starting from low concentration (0.1 nM).
|
189 |
10853708
|
Furthermore, the addition of activin A to 8.3 mM and 16.7 mM glucose induced an additional effect of the dose-dependent glucose-mediated insulin secretion (p<0.001).
|
190 |
10853708
|
The present data could support a role for activin A in human endocrine pancreas in modulating insulin response to different glucose concentrations.
|
191 |
11249068
|
PDX-1 plays a critical role in pancreatic development and insulin secretion.
|
192 |
11249068
|
The ARIP and ARIP/PDX-1 cells were treated with known growth and differentiation factors including hepatocyte growth factor, activin A, betacellulin, reg, INGAP, nicotinamide, and retinoic acid.
|
193 |
11272164
|
Pancreatic AR42J cells possess both exocrine and neuroendocrine properties and convert to insulin-producing cells upon treatment with activin A and hepatocyte growth factor (HGF).
|
194 |
11272164
|
These two factors were not detected in naive cells, whereas their mRNA levels were markedly increased after treatment with activin A and HGF.
|
195 |
11272164
|
Furthermore, introduction of antisense Pax4 did not affect the conversion into insulin-producing cells induced by activin A and HGF.
|
196 |
11272164
|
In contrast, transfection of neurogenin3 induced morphological changes similar to those induced by activin A.
|
197 |
11272164
|
Conversely, introduction of antisense neurogenin3 blocked the differentiation of AR42J cells induced by activin A and HGF.
|
198 |
11272164
|
These results indicate that activin A regulates the expression of neurogenin3, which is critical for the differentiation of AR42J into endocrine cells.
|
199 |
11272164
|
Pancreatic AR42J cells possess both exocrine and neuroendocrine properties and convert to insulin-producing cells upon treatment with activin A and hepatocyte growth factor (HGF).
|
200 |
11272164
|
These two factors were not detected in naive cells, whereas their mRNA levels were markedly increased after treatment with activin A and HGF.
|
201 |
11272164
|
Furthermore, introduction of antisense Pax4 did not affect the conversion into insulin-producing cells induced by activin A and HGF.
|
202 |
11272164
|
In contrast, transfection of neurogenin3 induced morphological changes similar to those induced by activin A.
|
203 |
11272164
|
Conversely, introduction of antisense neurogenin3 blocked the differentiation of AR42J cells induced by activin A and HGF.
|
204 |
11272164
|
These results indicate that activin A regulates the expression of neurogenin3, which is critical for the differentiation of AR42J into endocrine cells.
|
205 |
11272164
|
Pancreatic AR42J cells possess both exocrine and neuroendocrine properties and convert to insulin-producing cells upon treatment with activin A and hepatocyte growth factor (HGF).
|
206 |
11272164
|
These two factors were not detected in naive cells, whereas their mRNA levels were markedly increased after treatment with activin A and HGF.
|
207 |
11272164
|
Furthermore, introduction of antisense Pax4 did not affect the conversion into insulin-producing cells induced by activin A and HGF.
|
208 |
11272164
|
In contrast, transfection of neurogenin3 induced morphological changes similar to those induced by activin A.
|
209 |
11272164
|
Conversely, introduction of antisense neurogenin3 blocked the differentiation of AR42J cells induced by activin A and HGF.
|
210 |
11272164
|
These results indicate that activin A regulates the expression of neurogenin3, which is critical for the differentiation of AR42J into endocrine cells.
|
211 |
11272164
|
Pancreatic AR42J cells possess both exocrine and neuroendocrine properties and convert to insulin-producing cells upon treatment with activin A and hepatocyte growth factor (HGF).
|
212 |
11272164
|
These two factors were not detected in naive cells, whereas their mRNA levels were markedly increased after treatment with activin A and HGF.
|
213 |
11272164
|
Furthermore, introduction of antisense Pax4 did not affect the conversion into insulin-producing cells induced by activin A and HGF.
|
214 |
11272164
|
In contrast, transfection of neurogenin3 induced morphological changes similar to those induced by activin A.
|
215 |
11272164
|
Conversely, introduction of antisense neurogenin3 blocked the differentiation of AR42J cells induced by activin A and HGF.
|
216 |
11272164
|
These results indicate that activin A regulates the expression of neurogenin3, which is critical for the differentiation of AR42J into endocrine cells.
|
217 |
11272164
|
Pancreatic AR42J cells possess both exocrine and neuroendocrine properties and convert to insulin-producing cells upon treatment with activin A and hepatocyte growth factor (HGF).
|
218 |
11272164
|
These two factors were not detected in naive cells, whereas their mRNA levels were markedly increased after treatment with activin A and HGF.
|
219 |
11272164
|
Furthermore, introduction of antisense Pax4 did not affect the conversion into insulin-producing cells induced by activin A and HGF.
|
220 |
11272164
|
In contrast, transfection of neurogenin3 induced morphological changes similar to those induced by activin A.
|
221 |
11272164
|
Conversely, introduction of antisense neurogenin3 blocked the differentiation of AR42J cells induced by activin A and HGF.
|
222 |
11272164
|
These results indicate that activin A regulates the expression of neurogenin3, which is critical for the differentiation of AR42J into endocrine cells.
|
223 |
11272164
|
Pancreatic AR42J cells possess both exocrine and neuroendocrine properties and convert to insulin-producing cells upon treatment with activin A and hepatocyte growth factor (HGF).
|
224 |
11272164
|
These two factors were not detected in naive cells, whereas their mRNA levels were markedly increased after treatment with activin A and HGF.
|
225 |
11272164
|
Furthermore, introduction of antisense Pax4 did not affect the conversion into insulin-producing cells induced by activin A and HGF.
|
226 |
11272164
|
In contrast, transfection of neurogenin3 induced morphological changes similar to those induced by activin A.
|
227 |
11272164
|
Conversely, introduction of antisense neurogenin3 blocked the differentiation of AR42J cells induced by activin A and HGF.
|
228 |
11272164
|
These results indicate that activin A regulates the expression of neurogenin3, which is critical for the differentiation of AR42J into endocrine cells.
|
229 |
11334431
|
No evidence for linkage or for diabetes-associated mutations in the activin type 2B receptor gene (ACVR2B) in French patients with mature-onset diabetes of the young or type 2 diabetes.
|
230 |
11334431
|
For transmembrane signaling, activins bind directly to activin receptor type 2A (ACVR2A) or 2B (ACVR2B).
|
231 |
11334431
|
No evidence for linkage or for diabetes-associated mutations in the activin type 2B receptor gene (ACVR2B) in French patients with mature-onset diabetes of the young or type 2 diabetes.
|
232 |
11334431
|
For transmembrane signaling, activins bind directly to activin receptor type 2A (ACVR2A) or 2B (ACVR2B).
|
233 |
11675415
|
Bone morphogenetic protein-7 (BMP7), a member of the transforming growth factor-beta (TGF-beta) superfamily of cytokines, is highly expressed in renal tubules and generally promotes maintenance of epithelial phenotype.
|
234 |
11675415
|
Renal expression of the high-affinity BMP type II receptor and the type I receptor Alk2 (activin receptor-like kinase-2) decreased.
|
235 |
11675415
|
Alk3 tended to decrease, but Alk6 remained unchanged.
|
236 |
11675415
|
In cultured tubular cells, TGF-beta reduced BMP7 and Alk3 expression and increased gremlin but did not interrupt BMP7-induced activation of smad5 or Erk1 and -2.
|
237 |
11675415
|
In contrast, BMP7 did not alter TGF-beta expression.
|
238 |
11675415
|
Neutralization of endogenous BMP7 in cultured proximal tubular cells raised the expression of fibronectin and tended to increase collagen alpha(1) III mRNA levels.
|
239 |
11675415
|
In conclusion, in experimental diabetic nephropathy, renal tubular BMP7 and some of its receptors decreased and gremlin, a secreted BMP antagonist, increased.
|
240 |
12114736
|
We examined the immunohistochemical localization of activin A/erythroid differentiation factor (EDF) in the pancreases of normal and diabetic rats with insulin-dependent diabetes mellitus or noninsulin-dependent diabetes mellitus to elucidate how activin A/EDF modulates insulin secretion.
|
241 |
12114736
|
In both the normal and the diabetic pancreas, all of the cells staining with antirecombinant human (rh) activin A/EDF antiserum were insulin-producing B-cells, and they gradually decreased in number with the development of diabetic changes in both types of diabetic rats.
|
242 |
12114736
|
No rh activin AIEDF immunoreactivity was detected in A-, D-, or pancreatic polypeptide (PR) cells in the islets, or in the exocrine cells.
|
243 |
12114736
|
The in situ hybridization (ISH) method showed that activin A/EDF mRNA is localized in activin A/EDF-positive cells.
|
244 |
12114736
|
These data indicated that activin A/EDF localizes in insulin-producing B-cells of normal and diabetic pancreases, and may act as an autocrine modulator of insulin secretion.
|
245 |
12114736
|
We examined the immunohistochemical localization of activin A/erythroid differentiation factor (EDF) in the pancreases of normal and diabetic rats with insulin-dependent diabetes mellitus or noninsulin-dependent diabetes mellitus to elucidate how activin A/EDF modulates insulin secretion.
|
246 |
12114736
|
In both the normal and the diabetic pancreas, all of the cells staining with antirecombinant human (rh) activin A/EDF antiserum were insulin-producing B-cells, and they gradually decreased in number with the development of diabetic changes in both types of diabetic rats.
|
247 |
12114736
|
No rh activin AIEDF immunoreactivity was detected in A-, D-, or pancreatic polypeptide (PR) cells in the islets, or in the exocrine cells.
|
248 |
12114736
|
The in situ hybridization (ISH) method showed that activin A/EDF mRNA is localized in activin A/EDF-positive cells.
|
249 |
12114736
|
These data indicated that activin A/EDF localizes in insulin-producing B-cells of normal and diabetic pancreases, and may act as an autocrine modulator of insulin secretion.
|
250 |
12114736
|
We examined the immunohistochemical localization of activin A/erythroid differentiation factor (EDF) in the pancreases of normal and diabetic rats with insulin-dependent diabetes mellitus or noninsulin-dependent diabetes mellitus to elucidate how activin A/EDF modulates insulin secretion.
|
251 |
12114736
|
In both the normal and the diabetic pancreas, all of the cells staining with antirecombinant human (rh) activin A/EDF antiserum were insulin-producing B-cells, and they gradually decreased in number with the development of diabetic changes in both types of diabetic rats.
|
252 |
12114736
|
No rh activin AIEDF immunoreactivity was detected in A-, D-, or pancreatic polypeptide (PR) cells in the islets, or in the exocrine cells.
|
253 |
12114736
|
The in situ hybridization (ISH) method showed that activin A/EDF mRNA is localized in activin A/EDF-positive cells.
|
254 |
12114736
|
These data indicated that activin A/EDF localizes in insulin-producing B-cells of normal and diabetic pancreases, and may act as an autocrine modulator of insulin secretion.
|
255 |
12114736
|
We examined the immunohistochemical localization of activin A/erythroid differentiation factor (EDF) in the pancreases of normal and diabetic rats with insulin-dependent diabetes mellitus or noninsulin-dependent diabetes mellitus to elucidate how activin A/EDF modulates insulin secretion.
|
256 |
12114736
|
In both the normal and the diabetic pancreas, all of the cells staining with antirecombinant human (rh) activin A/EDF antiserum were insulin-producing B-cells, and they gradually decreased in number with the development of diabetic changes in both types of diabetic rats.
|
257 |
12114736
|
No rh activin AIEDF immunoreactivity was detected in A-, D-, or pancreatic polypeptide (PR) cells in the islets, or in the exocrine cells.
|
258 |
12114736
|
The in situ hybridization (ISH) method showed that activin A/EDF mRNA is localized in activin A/EDF-positive cells.
|
259 |
12114736
|
These data indicated that activin A/EDF localizes in insulin-producing B-cells of normal and diabetic pancreases, and may act as an autocrine modulator of insulin secretion.
|
260 |
12114736
|
We examined the immunohistochemical localization of activin A/erythroid differentiation factor (EDF) in the pancreases of normal and diabetic rats with insulin-dependent diabetes mellitus or noninsulin-dependent diabetes mellitus to elucidate how activin A/EDF modulates insulin secretion.
|
261 |
12114736
|
In both the normal and the diabetic pancreas, all of the cells staining with antirecombinant human (rh) activin A/EDF antiserum were insulin-producing B-cells, and they gradually decreased in number with the development of diabetic changes in both types of diabetic rats.
|
262 |
12114736
|
No rh activin AIEDF immunoreactivity was detected in A-, D-, or pancreatic polypeptide (PR) cells in the islets, or in the exocrine cells.
|
263 |
12114736
|
The in situ hybridization (ISH) method showed that activin A/EDF mRNA is localized in activin A/EDF-positive cells.
|
264 |
12114736
|
These data indicated that activin A/EDF localizes in insulin-producing B-cells of normal and diabetic pancreases, and may act as an autocrine modulator of insulin secretion.
|
265 |
12606518
|
Following treatment of AR42J cells with activin A and hepatocyte growth factor, the protein levels of h1-calponin decreased in a time-dependent manner during the course of the cell differentiation.
|
266 |
14514635
|
Nestin was visualized in the platelet endothelial cell adhesion molecule and alpha smooth muscle actin-positive blood vessels and colocalized with vimentin in the interstitium.
|
267 |
14514635
|
Nestin was not observed in pan cytokeratin (pCK)-positive ductal epithelium or insulin cells.
|
268 |
14514635
|
Purified nestin+ cells also coexpressed vimentin and lacked pCK immunoreactivity.
|
269 |
14514635
|
Exposure of selected nestin+ cells to nicotinamide, hepatocyte growth factor/scatter factor, betacellulin, activin A, or exendin-4 failed to induce pancreatic and duodenal homeobox gene-1 or insulin message as determined by RT-PCR.
|
270 |
14514635
|
Transplantation of nestin+ cells and fetal pancreatic fibroblasts into athymic mice also failed to result in the development of beta-cells, whereas nestin- fetal pancreatic epithelial cells gave rise to functional insulin-secreting beta-cells.
|
271 |
14732718
|
Type IV collagen is transcriptionally regulated by Smad1 under advanced glycation end product (AGE) stimulation.
|
272 |
14732718
|
To elucidate the interaction between transforming growth factor-beta and Smad1, we investigated whether activin receptor-liked kinase1 (ALK1) was involved in this regulation.
|
273 |
14732718
|
We also demonstrated that Smad1 and ALK1 were highly expressed in human diabetic nephropathy.
|
274 |
14988244
|
In the present study, we used neonatal rats treated with streptozotocin (STZ) to investigate the effects of activin A and BTC on regeneration of pancreatic beta-cells.
|
275 |
14988244
|
One-day-old Sprague-Dawley rats were injected with STZ (85 micro g/g) and then administered for 7 days with activin A and/or BTC.
|
276 |
14988244
|
Treatment with activin A and BTC significantly reduced the plasma glucose concentration and the plasma glucose response to intraperitoneal glucose loading.
|
277 |
14988244
|
The pancreatic insulin content and beta-cell mass in rats treated with activin A and BTC were significantly increased compared with the control group on day 8 and at 2 months.
|
278 |
14988244
|
Treatment with activin A and BTC significantly increased the DNA synthesis in preexisting beta-cells, ductal cells, and delta-cells.
|
279 |
14988244
|
The number of islet cell-like clusters (ICCs) and islets was significantly increased by treatment with activin A and BTC.
|
280 |
14988244
|
In addition, the number of insulin/somatostatin-positive cells and pancreatic duodenal homeobox-1/somatostatin-positive cells was significantly increased.
|
281 |
14988244
|
These results indicate that, in neonatal STZ-treated rats, a combination of activin A and BTC promoted regeneration of pancreatic beta-cells and improved glucose metabolism in adults.
|
282 |
14988244
|
In the present study, we used neonatal rats treated with streptozotocin (STZ) to investigate the effects of activin A and BTC on regeneration of pancreatic beta-cells.
|
283 |
14988244
|
One-day-old Sprague-Dawley rats were injected with STZ (85 micro g/g) and then administered for 7 days with activin A and/or BTC.
|
284 |
14988244
|
Treatment with activin A and BTC significantly reduced the plasma glucose concentration and the plasma glucose response to intraperitoneal glucose loading.
|
285 |
14988244
|
The pancreatic insulin content and beta-cell mass in rats treated with activin A and BTC were significantly increased compared with the control group on day 8 and at 2 months.
|
286 |
14988244
|
Treatment with activin A and BTC significantly increased the DNA synthesis in preexisting beta-cells, ductal cells, and delta-cells.
|
287 |
14988244
|
The number of islet cell-like clusters (ICCs) and islets was significantly increased by treatment with activin A and BTC.
|
288 |
14988244
|
In addition, the number of insulin/somatostatin-positive cells and pancreatic duodenal homeobox-1/somatostatin-positive cells was significantly increased.
|
289 |
14988244
|
These results indicate that, in neonatal STZ-treated rats, a combination of activin A and BTC promoted regeneration of pancreatic beta-cells and improved glucose metabolism in adults.
|
290 |
14988244
|
In the present study, we used neonatal rats treated with streptozotocin (STZ) to investigate the effects of activin A and BTC on regeneration of pancreatic beta-cells.
|
291 |
14988244
|
One-day-old Sprague-Dawley rats were injected with STZ (85 micro g/g) and then administered for 7 days with activin A and/or BTC.
|
292 |
14988244
|
Treatment with activin A and BTC significantly reduced the plasma glucose concentration and the plasma glucose response to intraperitoneal glucose loading.
|
293 |
14988244
|
The pancreatic insulin content and beta-cell mass in rats treated with activin A and BTC were significantly increased compared with the control group on day 8 and at 2 months.
|
294 |
14988244
|
Treatment with activin A and BTC significantly increased the DNA synthesis in preexisting beta-cells, ductal cells, and delta-cells.
|
295 |
14988244
|
The number of islet cell-like clusters (ICCs) and islets was significantly increased by treatment with activin A and BTC.
|
296 |
14988244
|
In addition, the number of insulin/somatostatin-positive cells and pancreatic duodenal homeobox-1/somatostatin-positive cells was significantly increased.
|
297 |
14988244
|
These results indicate that, in neonatal STZ-treated rats, a combination of activin A and BTC promoted regeneration of pancreatic beta-cells and improved glucose metabolism in adults.
|
298 |
14988244
|
In the present study, we used neonatal rats treated with streptozotocin (STZ) to investigate the effects of activin A and BTC on regeneration of pancreatic beta-cells.
|
299 |
14988244
|
One-day-old Sprague-Dawley rats were injected with STZ (85 micro g/g) and then administered for 7 days with activin A and/or BTC.
|
300 |
14988244
|
Treatment with activin A and BTC significantly reduced the plasma glucose concentration and the plasma glucose response to intraperitoneal glucose loading.
|
301 |
14988244
|
The pancreatic insulin content and beta-cell mass in rats treated with activin A and BTC were significantly increased compared with the control group on day 8 and at 2 months.
|
302 |
14988244
|
Treatment with activin A and BTC significantly increased the DNA synthesis in preexisting beta-cells, ductal cells, and delta-cells.
|
303 |
14988244
|
The number of islet cell-like clusters (ICCs) and islets was significantly increased by treatment with activin A and BTC.
|
304 |
14988244
|
In addition, the number of insulin/somatostatin-positive cells and pancreatic duodenal homeobox-1/somatostatin-positive cells was significantly increased.
|
305 |
14988244
|
These results indicate that, in neonatal STZ-treated rats, a combination of activin A and BTC promoted regeneration of pancreatic beta-cells and improved glucose metabolism in adults.
|
306 |
14988244
|
In the present study, we used neonatal rats treated with streptozotocin (STZ) to investigate the effects of activin A and BTC on regeneration of pancreatic beta-cells.
|
307 |
14988244
|
One-day-old Sprague-Dawley rats were injected with STZ (85 micro g/g) and then administered for 7 days with activin A and/or BTC.
|
308 |
14988244
|
Treatment with activin A and BTC significantly reduced the plasma glucose concentration and the plasma glucose response to intraperitoneal glucose loading.
|
309 |
14988244
|
The pancreatic insulin content and beta-cell mass in rats treated with activin A and BTC were significantly increased compared with the control group on day 8 and at 2 months.
|
310 |
14988244
|
Treatment with activin A and BTC significantly increased the DNA synthesis in preexisting beta-cells, ductal cells, and delta-cells.
|
311 |
14988244
|
The number of islet cell-like clusters (ICCs) and islets was significantly increased by treatment with activin A and BTC.
|
312 |
14988244
|
In addition, the number of insulin/somatostatin-positive cells and pancreatic duodenal homeobox-1/somatostatin-positive cells was significantly increased.
|
313 |
14988244
|
These results indicate that, in neonatal STZ-treated rats, a combination of activin A and BTC promoted regeneration of pancreatic beta-cells and improved glucose metabolism in adults.
|
314 |
14988244
|
In the present study, we used neonatal rats treated with streptozotocin (STZ) to investigate the effects of activin A and BTC on regeneration of pancreatic beta-cells.
|
315 |
14988244
|
One-day-old Sprague-Dawley rats were injected with STZ (85 micro g/g) and then administered for 7 days with activin A and/or BTC.
|
316 |
14988244
|
Treatment with activin A and BTC significantly reduced the plasma glucose concentration and the plasma glucose response to intraperitoneal glucose loading.
|
317 |
14988244
|
The pancreatic insulin content and beta-cell mass in rats treated with activin A and BTC were significantly increased compared with the control group on day 8 and at 2 months.
|
318 |
14988244
|
Treatment with activin A and BTC significantly increased the DNA synthesis in preexisting beta-cells, ductal cells, and delta-cells.
|
319 |
14988244
|
The number of islet cell-like clusters (ICCs) and islets was significantly increased by treatment with activin A and BTC.
|
320 |
14988244
|
In addition, the number of insulin/somatostatin-positive cells and pancreatic duodenal homeobox-1/somatostatin-positive cells was significantly increased.
|
321 |
14988244
|
These results indicate that, in neonatal STZ-treated rats, a combination of activin A and BTC promoted regeneration of pancreatic beta-cells and improved glucose metabolism in adults.
|
322 |
14988244
|
In the present study, we used neonatal rats treated with streptozotocin (STZ) to investigate the effects of activin A and BTC on regeneration of pancreatic beta-cells.
|
323 |
14988244
|
One-day-old Sprague-Dawley rats were injected with STZ (85 micro g/g) and then administered for 7 days with activin A and/or BTC.
|
324 |
14988244
|
Treatment with activin A and BTC significantly reduced the plasma glucose concentration and the plasma glucose response to intraperitoneal glucose loading.
|
325 |
14988244
|
The pancreatic insulin content and beta-cell mass in rats treated with activin A and BTC were significantly increased compared with the control group on day 8 and at 2 months.
|
326 |
14988244
|
Treatment with activin A and BTC significantly increased the DNA synthesis in preexisting beta-cells, ductal cells, and delta-cells.
|
327 |
14988244
|
The number of islet cell-like clusters (ICCs) and islets was significantly increased by treatment with activin A and BTC.
|
328 |
14988244
|
In addition, the number of insulin/somatostatin-positive cells and pancreatic duodenal homeobox-1/somatostatin-positive cells was significantly increased.
|
329 |
14988244
|
These results indicate that, in neonatal STZ-treated rats, a combination of activin A and BTC promoted regeneration of pancreatic beta-cells and improved glucose metabolism in adults.
|
330 |
15154911
|
The use of mice with a targeted deletion of Smad3, one of the two homologous proteins which signals from TGF-beta/activin, shows that most of the pro-fibrotic activities of TGF-beta are mediated by Smad3.
|
331 |
15154911
|
Smad3 null inflammatory cells and fibroblasts do not respond to the chemotactic effects of TGF-beta and do not autoinduce TGF-beta.
|
332 |
15154911
|
The loss of Smad3 also interferes with TGF-beta-mediated induction of EMT and genes for collagens, plasminogen activator inhibitor-1 and the tissue inhibitor of metalloprotease-1.
|
333 |
15154911
|
Additionally, inhibition of Smad3 by overexpression of the inhibitory Smad7 protein or by treatment with the small molecule, halofuginone, dramatically reduces responses in animal models of kidney, lung, liver and radiation-induced fibrosis.
|
334 |
15180456
|
Activins, myostatin and related TGF-beta family members as novel therapeutic targets for endocrine, metabolic and immune disorders.
|
335 |
15180456
|
Recent studies have revealed that activins and myostatin signal through activin type II receptors (ActRIIA and ActRIIB) and their activities are regulated by extracellular binding proteins, follistatins and follistatin-related gene (FLRG).
|
336 |
15232060
|
The FSH-beta and GnRH-receptor genes are up-regulated by pituitary activin and down-regulated by pituitary follistatin, and circulating inhibin disrupts this local regulation by functioning as an endogenous competitor of the activin receptor.
|
337 |
15232060
|
There is evidence that the intra-pituitary regulation of FSH-beta and GnRH-receptor gene expression may activate pubertal maturation in male rats.
|
338 |
15277382
|
Interestingly, the expression of endogenous cellular inhibitors of activin signaling, follistatin and Cripto, were also found to be augmented.
|
339 |
15319828
|
Inhibin, activin, and follistatin were first identified as gonadal hormones that could exert selective effects on follicle-stimulating hormone (FSH) secretion without affecting luteinizing hormone (LH).
|
340 |
15319828
|
Although the primary source of inhibin remains the gonad, both activin and follistatin are produced in extragonadal tissues and can exert effects on FSH through an autocrine-paracrine mechanism.
|
341 |
15319828
|
Second, activin up-regulates gonadotropin-releasing hormone receptor (GnRHR) gene expression, leading to alterations in the synthesis and release of both gonadotropins in response to GnRH.
|
342 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
343 |
15319828
|
Both inhibin and follistatin can negatively regulate these effects by preventing activin binding to the activin receptor at the cell membrane and blocking activation of downstream signal transduction pathways.
|
344 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
345 |
15319828
|
The mechanisms of inhibin and activin signaling are also reported, with particular attention to developments in our understanding of inhibin receptor action and activin-induced transcriptional regulation of the FSHbeta gene promoter.
|
346 |
15319828
|
Inhibin, activin, and follistatin were first identified as gonadal hormones that could exert selective effects on follicle-stimulating hormone (FSH) secretion without affecting luteinizing hormone (LH).
|
347 |
15319828
|
Although the primary source of inhibin remains the gonad, both activin and follistatin are produced in extragonadal tissues and can exert effects on FSH through an autocrine-paracrine mechanism.
|
348 |
15319828
|
Second, activin up-regulates gonadotropin-releasing hormone receptor (GnRHR) gene expression, leading to alterations in the synthesis and release of both gonadotropins in response to GnRH.
|
349 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
350 |
15319828
|
Both inhibin and follistatin can negatively regulate these effects by preventing activin binding to the activin receptor at the cell membrane and blocking activation of downstream signal transduction pathways.
|
351 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
352 |
15319828
|
The mechanisms of inhibin and activin signaling are also reported, with particular attention to developments in our understanding of inhibin receptor action and activin-induced transcriptional regulation of the FSHbeta gene promoter.
|
353 |
15319828
|
Inhibin, activin, and follistatin were first identified as gonadal hormones that could exert selective effects on follicle-stimulating hormone (FSH) secretion without affecting luteinizing hormone (LH).
|
354 |
15319828
|
Although the primary source of inhibin remains the gonad, both activin and follistatin are produced in extragonadal tissues and can exert effects on FSH through an autocrine-paracrine mechanism.
|
355 |
15319828
|
Second, activin up-regulates gonadotropin-releasing hormone receptor (GnRHR) gene expression, leading to alterations in the synthesis and release of both gonadotropins in response to GnRH.
|
356 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
357 |
15319828
|
Both inhibin and follistatin can negatively regulate these effects by preventing activin binding to the activin receptor at the cell membrane and blocking activation of downstream signal transduction pathways.
|
358 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
359 |
15319828
|
The mechanisms of inhibin and activin signaling are also reported, with particular attention to developments in our understanding of inhibin receptor action and activin-induced transcriptional regulation of the FSHbeta gene promoter.
|
360 |
15319828
|
Inhibin, activin, and follistatin were first identified as gonadal hormones that could exert selective effects on follicle-stimulating hormone (FSH) secretion without affecting luteinizing hormone (LH).
|
361 |
15319828
|
Although the primary source of inhibin remains the gonad, both activin and follistatin are produced in extragonadal tissues and can exert effects on FSH through an autocrine-paracrine mechanism.
|
362 |
15319828
|
Second, activin up-regulates gonadotropin-releasing hormone receptor (GnRHR) gene expression, leading to alterations in the synthesis and release of both gonadotropins in response to GnRH.
|
363 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
364 |
15319828
|
Both inhibin and follistatin can negatively regulate these effects by preventing activin binding to the activin receptor at the cell membrane and blocking activation of downstream signal transduction pathways.
|
365 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
366 |
15319828
|
The mechanisms of inhibin and activin signaling are also reported, with particular attention to developments in our understanding of inhibin receptor action and activin-induced transcriptional regulation of the FSHbeta gene promoter.
|
367 |
15319828
|
Inhibin, activin, and follistatin were first identified as gonadal hormones that could exert selective effects on follicle-stimulating hormone (FSH) secretion without affecting luteinizing hormone (LH).
|
368 |
15319828
|
Although the primary source of inhibin remains the gonad, both activin and follistatin are produced in extragonadal tissues and can exert effects on FSH through an autocrine-paracrine mechanism.
|
369 |
15319828
|
Second, activin up-regulates gonadotropin-releasing hormone receptor (GnRHR) gene expression, leading to alterations in the synthesis and release of both gonadotropins in response to GnRH.
|
370 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
371 |
15319828
|
Both inhibin and follistatin can negatively regulate these effects by preventing activin binding to the activin receptor at the cell membrane and blocking activation of downstream signal transduction pathways.
|
372 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
373 |
15319828
|
The mechanisms of inhibin and activin signaling are also reported, with particular attention to developments in our understanding of inhibin receptor action and activin-induced transcriptional regulation of the FSHbeta gene promoter.
|
374 |
15319828
|
Inhibin, activin, and follistatin were first identified as gonadal hormones that could exert selective effects on follicle-stimulating hormone (FSH) secretion without affecting luteinizing hormone (LH).
|
375 |
15319828
|
Although the primary source of inhibin remains the gonad, both activin and follistatin are produced in extragonadal tissues and can exert effects on FSH through an autocrine-paracrine mechanism.
|
376 |
15319828
|
Second, activin up-regulates gonadotropin-releasing hormone receptor (GnRHR) gene expression, leading to alterations in the synthesis and release of both gonadotropins in response to GnRH.
|
377 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
378 |
15319828
|
Both inhibin and follistatin can negatively regulate these effects by preventing activin binding to the activin receptor at the cell membrane and blocking activation of downstream signal transduction pathways.
|
379 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
380 |
15319828
|
The mechanisms of inhibin and activin signaling are also reported, with particular attention to developments in our understanding of inhibin receptor action and activin-induced transcriptional regulation of the FSHbeta gene promoter.
|
381 |
15319828
|
Inhibin, activin, and follistatin were first identified as gonadal hormones that could exert selective effects on follicle-stimulating hormone (FSH) secretion without affecting luteinizing hormone (LH).
|
382 |
15319828
|
Although the primary source of inhibin remains the gonad, both activin and follistatin are produced in extragonadal tissues and can exert effects on FSH through an autocrine-paracrine mechanism.
|
383 |
15319828
|
Second, activin up-regulates gonadotropin-releasing hormone receptor (GnRHR) gene expression, leading to alterations in the synthesis and release of both gonadotropins in response to GnRH.
|
384 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
385 |
15319828
|
Both inhibin and follistatin can negatively regulate these effects by preventing activin binding to the activin receptor at the cell membrane and blocking activation of downstream signal transduction pathways.
|
386 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
387 |
15319828
|
The mechanisms of inhibin and activin signaling are also reported, with particular attention to developments in our understanding of inhibin receptor action and activin-induced transcriptional regulation of the FSHbeta gene promoter.
|
388 |
15375186
|
Synergy between activin A and gonadotropin-releasing hormone in transcriptional activation of the rat follicle-stimulating hormone-beta gene.
|
389 |
15375186
|
Both activin and GnRH can independently stimulate expression of the FSHbeta subunit gene.
|
390 |
15375186
|
In this study, we used the gonadotrope-derived LbetaT2 cell line to investigate the potential interaction between activin and GnRH in regulating the transcriptional activity of the rat FSHbeta gene promoter.
|
391 |
15375186
|
Activin A and GnRH synergistically enhanced rat FSHbeta transcriptional activity.
|
392 |
15375186
|
Overexpression of SMAD3 (mediator of decapentaplegic-related protein 3), but not of SMAD2, increased transcriptional activation of the rat (r) FSHbeta gene promoter, which was further enhanced by the combined overexpression of SMAD3 and 4 (3+4).
|
393 |
15375186
|
The stimulatory effects of SMAD3 overexpression were localized to -472/-256 of the rFSHbeta gene promoter, and activin- and GnRH-responsive proteins were shown to bind to region -284/-252.
|
394 |
15375186
|
Mutation of two bases located in the center of this palindrome effectively abrogated SMAD4 binding, markedly reduced SMAD3 and 3+4 stimulation of the rFSHbeta gene promoter, and significantly decreased the synergistic enhancement of promoter activity by both activin A and GnRH, and SMAD3 and GnRH.
|
395 |
15375186
|
Blockade of the MAPK-signaling pathway did not significantly affect the response to combined stimulation with activin and GnRH.
|
396 |
15375186
|
In contrast, interference with SMAD3 signaling caused a significant reduction in activin and GnRH synergy.
|
397 |
15375186
|
The results indicate that SMAD3 plays an important role in the synergistic effects of activin and GnRH and demonstrate that this synergy is mediated by a palindromic cis-element located at -266/-259 of the rFSHbeta gene promoter.
|
398 |
15375186
|
Synergy between activin A and gonadotropin-releasing hormone in transcriptional activation of the rat follicle-stimulating hormone-beta gene.
|
399 |
15375186
|
Both activin and GnRH can independently stimulate expression of the FSHbeta subunit gene.
|
400 |
15375186
|
In this study, we used the gonadotrope-derived LbetaT2 cell line to investigate the potential interaction between activin and GnRH in regulating the transcriptional activity of the rat FSHbeta gene promoter.
|
401 |
15375186
|
Activin A and GnRH synergistically enhanced rat FSHbeta transcriptional activity.
|
402 |
15375186
|
Overexpression of SMAD3 (mediator of decapentaplegic-related protein 3), but not of SMAD2, increased transcriptional activation of the rat (r) FSHbeta gene promoter, which was further enhanced by the combined overexpression of SMAD3 and 4 (3+4).
|
403 |
15375186
|
The stimulatory effects of SMAD3 overexpression were localized to -472/-256 of the rFSHbeta gene promoter, and activin- and GnRH-responsive proteins were shown to bind to region -284/-252.
|
404 |
15375186
|
Mutation of two bases located in the center of this palindrome effectively abrogated SMAD4 binding, markedly reduced SMAD3 and 3+4 stimulation of the rFSHbeta gene promoter, and significantly decreased the synergistic enhancement of promoter activity by both activin A and GnRH, and SMAD3 and GnRH.
|
405 |
15375186
|
Blockade of the MAPK-signaling pathway did not significantly affect the response to combined stimulation with activin and GnRH.
|
406 |
15375186
|
In contrast, interference with SMAD3 signaling caused a significant reduction in activin and GnRH synergy.
|
407 |
15375186
|
The results indicate that SMAD3 plays an important role in the synergistic effects of activin and GnRH and demonstrate that this synergy is mediated by a palindromic cis-element located at -266/-259 of the rFSHbeta gene promoter.
|
408 |
15375186
|
Synergy between activin A and gonadotropin-releasing hormone in transcriptional activation of the rat follicle-stimulating hormone-beta gene.
|
409 |
15375186
|
Both activin and GnRH can independently stimulate expression of the FSHbeta subunit gene.
|
410 |
15375186
|
In this study, we used the gonadotrope-derived LbetaT2 cell line to investigate the potential interaction between activin and GnRH in regulating the transcriptional activity of the rat FSHbeta gene promoter.
|
411 |
15375186
|
Activin A and GnRH synergistically enhanced rat FSHbeta transcriptional activity.
|
412 |
15375186
|
Overexpression of SMAD3 (mediator of decapentaplegic-related protein 3), but not of SMAD2, increased transcriptional activation of the rat (r) FSHbeta gene promoter, which was further enhanced by the combined overexpression of SMAD3 and 4 (3+4).
|
413 |
15375186
|
The stimulatory effects of SMAD3 overexpression were localized to -472/-256 of the rFSHbeta gene promoter, and activin- and GnRH-responsive proteins were shown to bind to region -284/-252.
|
414 |
15375186
|
Mutation of two bases located in the center of this palindrome effectively abrogated SMAD4 binding, markedly reduced SMAD3 and 3+4 stimulation of the rFSHbeta gene promoter, and significantly decreased the synergistic enhancement of promoter activity by both activin A and GnRH, and SMAD3 and GnRH.
|
415 |
15375186
|
Blockade of the MAPK-signaling pathway did not significantly affect the response to combined stimulation with activin and GnRH.
|
416 |
15375186
|
In contrast, interference with SMAD3 signaling caused a significant reduction in activin and GnRH synergy.
|
417 |
15375186
|
The results indicate that SMAD3 plays an important role in the synergistic effects of activin and GnRH and demonstrate that this synergy is mediated by a palindromic cis-element located at -266/-259 of the rFSHbeta gene promoter.
|
418 |
15375186
|
Synergy between activin A and gonadotropin-releasing hormone in transcriptional activation of the rat follicle-stimulating hormone-beta gene.
|
419 |
15375186
|
Both activin and GnRH can independently stimulate expression of the FSHbeta subunit gene.
|
420 |
15375186
|
In this study, we used the gonadotrope-derived LbetaT2 cell line to investigate the potential interaction between activin and GnRH in regulating the transcriptional activity of the rat FSHbeta gene promoter.
|
421 |
15375186
|
Activin A and GnRH synergistically enhanced rat FSHbeta transcriptional activity.
|
422 |
15375186
|
Overexpression of SMAD3 (mediator of decapentaplegic-related protein 3), but not of SMAD2, increased transcriptional activation of the rat (r) FSHbeta gene promoter, which was further enhanced by the combined overexpression of SMAD3 and 4 (3+4).
|
423 |
15375186
|
The stimulatory effects of SMAD3 overexpression were localized to -472/-256 of the rFSHbeta gene promoter, and activin- and GnRH-responsive proteins were shown to bind to region -284/-252.
|
424 |
15375186
|
Mutation of two bases located in the center of this palindrome effectively abrogated SMAD4 binding, markedly reduced SMAD3 and 3+4 stimulation of the rFSHbeta gene promoter, and significantly decreased the synergistic enhancement of promoter activity by both activin A and GnRH, and SMAD3 and GnRH.
|
425 |
15375186
|
Blockade of the MAPK-signaling pathway did not significantly affect the response to combined stimulation with activin and GnRH.
|
426 |
15375186
|
In contrast, interference with SMAD3 signaling caused a significant reduction in activin and GnRH synergy.
|
427 |
15375186
|
The results indicate that SMAD3 plays an important role in the synergistic effects of activin and GnRH and demonstrate that this synergy is mediated by a palindromic cis-element located at -266/-259 of the rFSHbeta gene promoter.
|
428 |
15375186
|
Synergy between activin A and gonadotropin-releasing hormone in transcriptional activation of the rat follicle-stimulating hormone-beta gene.
|
429 |
15375186
|
Both activin and GnRH can independently stimulate expression of the FSHbeta subunit gene.
|
430 |
15375186
|
In this study, we used the gonadotrope-derived LbetaT2 cell line to investigate the potential interaction between activin and GnRH in regulating the transcriptional activity of the rat FSHbeta gene promoter.
|
431 |
15375186
|
Activin A and GnRH synergistically enhanced rat FSHbeta transcriptional activity.
|
432 |
15375186
|
Overexpression of SMAD3 (mediator of decapentaplegic-related protein 3), but not of SMAD2, increased transcriptional activation of the rat (r) FSHbeta gene promoter, which was further enhanced by the combined overexpression of SMAD3 and 4 (3+4).
|
433 |
15375186
|
The stimulatory effects of SMAD3 overexpression were localized to -472/-256 of the rFSHbeta gene promoter, and activin- and GnRH-responsive proteins were shown to bind to region -284/-252.
|
434 |
15375186
|
Mutation of two bases located in the center of this palindrome effectively abrogated SMAD4 binding, markedly reduced SMAD3 and 3+4 stimulation of the rFSHbeta gene promoter, and significantly decreased the synergistic enhancement of promoter activity by both activin A and GnRH, and SMAD3 and GnRH.
|
435 |
15375186
|
Blockade of the MAPK-signaling pathway did not significantly affect the response to combined stimulation with activin and GnRH.
|
436 |
15375186
|
In contrast, interference with SMAD3 signaling caused a significant reduction in activin and GnRH synergy.
|
437 |
15375186
|
The results indicate that SMAD3 plays an important role in the synergistic effects of activin and GnRH and demonstrate that this synergy is mediated by a palindromic cis-element located at -266/-259 of the rFSHbeta gene promoter.
|
438 |
15375186
|
Synergy between activin A and gonadotropin-releasing hormone in transcriptional activation of the rat follicle-stimulating hormone-beta gene.
|
439 |
15375186
|
Both activin and GnRH can independently stimulate expression of the FSHbeta subunit gene.
|
440 |
15375186
|
In this study, we used the gonadotrope-derived LbetaT2 cell line to investigate the potential interaction between activin and GnRH in regulating the transcriptional activity of the rat FSHbeta gene promoter.
|
441 |
15375186
|
Activin A and GnRH synergistically enhanced rat FSHbeta transcriptional activity.
|
442 |
15375186
|
Overexpression of SMAD3 (mediator of decapentaplegic-related protein 3), but not of SMAD2, increased transcriptional activation of the rat (r) FSHbeta gene promoter, which was further enhanced by the combined overexpression of SMAD3 and 4 (3+4).
|
443 |
15375186
|
The stimulatory effects of SMAD3 overexpression were localized to -472/-256 of the rFSHbeta gene promoter, and activin- and GnRH-responsive proteins were shown to bind to region -284/-252.
|
444 |
15375186
|
Mutation of two bases located in the center of this palindrome effectively abrogated SMAD4 binding, markedly reduced SMAD3 and 3+4 stimulation of the rFSHbeta gene promoter, and significantly decreased the synergistic enhancement of promoter activity by both activin A and GnRH, and SMAD3 and GnRH.
|
445 |
15375186
|
Blockade of the MAPK-signaling pathway did not significantly affect the response to combined stimulation with activin and GnRH.
|
446 |
15375186
|
In contrast, interference with SMAD3 signaling caused a significant reduction in activin and GnRH synergy.
|
447 |
15375186
|
The results indicate that SMAD3 plays an important role in the synergistic effects of activin and GnRH and demonstrate that this synergy is mediated by a palindromic cis-element located at -266/-259 of the rFSHbeta gene promoter.
|
448 |
15375186
|
Synergy between activin A and gonadotropin-releasing hormone in transcriptional activation of the rat follicle-stimulating hormone-beta gene.
|
449 |
15375186
|
Both activin and GnRH can independently stimulate expression of the FSHbeta subunit gene.
|
450 |
15375186
|
In this study, we used the gonadotrope-derived LbetaT2 cell line to investigate the potential interaction between activin and GnRH in regulating the transcriptional activity of the rat FSHbeta gene promoter.
|
451 |
15375186
|
Activin A and GnRH synergistically enhanced rat FSHbeta transcriptional activity.
|
452 |
15375186
|
Overexpression of SMAD3 (mediator of decapentaplegic-related protein 3), but not of SMAD2, increased transcriptional activation of the rat (r) FSHbeta gene promoter, which was further enhanced by the combined overexpression of SMAD3 and 4 (3+4).
|
453 |
15375186
|
The stimulatory effects of SMAD3 overexpression were localized to -472/-256 of the rFSHbeta gene promoter, and activin- and GnRH-responsive proteins were shown to bind to region -284/-252.
|
454 |
15375186
|
Mutation of two bases located in the center of this palindrome effectively abrogated SMAD4 binding, markedly reduced SMAD3 and 3+4 stimulation of the rFSHbeta gene promoter, and significantly decreased the synergistic enhancement of promoter activity by both activin A and GnRH, and SMAD3 and GnRH.
|
455 |
15375186
|
Blockade of the MAPK-signaling pathway did not significantly affect the response to combined stimulation with activin and GnRH.
|
456 |
15375186
|
In contrast, interference with SMAD3 signaling caused a significant reduction in activin and GnRH synergy.
|
457 |
15375186
|
The results indicate that SMAD3 plays an important role in the synergistic effects of activin and GnRH and demonstrate that this synergy is mediated by a palindromic cis-element located at -266/-259 of the rFSHbeta gene promoter.
|
458 |
15375186
|
Synergy between activin A and gonadotropin-releasing hormone in transcriptional activation of the rat follicle-stimulating hormone-beta gene.
|
459 |
15375186
|
Both activin and GnRH can independently stimulate expression of the FSHbeta subunit gene.
|
460 |
15375186
|
In this study, we used the gonadotrope-derived LbetaT2 cell line to investigate the potential interaction between activin and GnRH in regulating the transcriptional activity of the rat FSHbeta gene promoter.
|
461 |
15375186
|
Activin A and GnRH synergistically enhanced rat FSHbeta transcriptional activity.
|
462 |
15375186
|
Overexpression of SMAD3 (mediator of decapentaplegic-related protein 3), but not of SMAD2, increased transcriptional activation of the rat (r) FSHbeta gene promoter, which was further enhanced by the combined overexpression of SMAD3 and 4 (3+4).
|
463 |
15375186
|
The stimulatory effects of SMAD3 overexpression were localized to -472/-256 of the rFSHbeta gene promoter, and activin- and GnRH-responsive proteins were shown to bind to region -284/-252.
|
464 |
15375186
|
Mutation of two bases located in the center of this palindrome effectively abrogated SMAD4 binding, markedly reduced SMAD3 and 3+4 stimulation of the rFSHbeta gene promoter, and significantly decreased the synergistic enhancement of promoter activity by both activin A and GnRH, and SMAD3 and GnRH.
|
465 |
15375186
|
Blockade of the MAPK-signaling pathway did not significantly affect the response to combined stimulation with activin and GnRH.
|
466 |
15375186
|
In contrast, interference with SMAD3 signaling caused a significant reduction in activin and GnRH synergy.
|
467 |
15375186
|
The results indicate that SMAD3 plays an important role in the synergistic effects of activin and GnRH and demonstrate that this synergy is mediated by a palindromic cis-element located at -266/-259 of the rFSHbeta gene promoter.
|
468 |
15504962
|
Interplay of glucagon-like peptide-1 and transforming growth factor-beta signaling in insulin-positive differentiation of AR42J cells.
|
469 |
15504962
|
Exogenous activin, possibly working through intracellular smad 2 and/or smad 3, as well as exogenous exendin-4 (a long-acting glucagon-like peptide-1 agonist) have both been shown to induce insulin-positive/endocrine differentiation in AR42J cells.
|
470 |
15504962
|
In particular, insulin-positive differentiation seems to entail an exendin-4-induced drop in smad 2 and elevation in smad 3 in RNA levels.
|
471 |
15504962
|
The coapplication of exogenous exendin-4 and, specifically, low-dose exogenous TGF-beta1 led to a dramatic 20-fold increase in insulin mRNA levels, supporting a novel synergistic and codependent relationship between exendin-4 signaling and TGF-beta isoform signaling.
|
472 |
15849173
|
Here we show that a simple three-step experimental approach based on the combination induction by activin A, all-trans retinoic acid, and other mature factors is able to induce murine ESCs to differentiate into insulin-producing cells in 2 weeks, and that insulin release of these induced cells is regulated by the glucose concentration.
|
473 |
16020542
|
Cross-talk between bone morphogenetic protein and transforming growth factor-beta signaling is essential for exendin-4-induced insulin-positive differentiation of AR42J cells.
|
474 |
16020542
|
We found that the canonical intracellular mediators of BMP signaling, Smad-1 and Smad-8, were significantly elevated in AR42J cells undergoing insulin-positive differentiation in response to exendin-4 treatment, suggesting a role for BMP signaling in beta-cell formation.
|
475 |
16020542
|
Similarly, endogenous BMP-2 ligand and ALK-1 receptor (activin receptor-like kinase-1; known to activate Smads 1 and 8) mRNAs were specifically up-regulated in exendin-4-treated AR42J cells.
|
476 |
16020542
|
Surprisingly, Smad-1 and Smad-8 levels were suppressed by the addition of BMP-soluble receptor inhibition of BMP ligand binding to its receptor.
|
477 |
16020542
|
BMP-2 ligand antisense also strongly inhibited Smad-1 and Smad-8 expression, again with the abolition of insulin-positive differentiation.
|
478 |
16020542
|
In short, BMP signaling may represent a novel downstream target of exendin-4 (glucagon-like peptide 1) signaling and potentially serve as an upstream regulator of transforming growth factor-beta isoform signaling to differentiate the acinar-like AR42J cells into insulin-secreting cells.
|
479 |
16123344
|
We have previously demonstrated that the expression of the beta-cell transcription factor pancreatic duodenal homeobox 1 (PDX-1) in human fetal liver cells activates multiple aspects of the beta-cell phenotype.
|
480 |
16123344
|
Cells cultured with activin A in serum-free medium upregulated expression of NeuroD and Nkx2.2 and downregulated paired box homeotic gene 6 (PAX-6).
|
481 |
16123344
|
Glucokinase and prohormone convertase 1/3 were also upregulated, whereas pancreatic polypeptide and glucagon as well as liver markers were downregulated.
|
482 |
16934249
|
Furthermore, pGL3.hINS-363 3x shows significant promoter activity in differentiated AR42J cells that can produce insulin after activin A and betacellulin treatment.
|
483 |
17229845
|
FSTL3 deletion reveals roles for TGF-beta family ligands in glucose and fat homeostasis in adults.
|
484 |
17229845
|
Activin and myostatin are related members of the TGF-beta growth factor superfamily.
|
485 |
17229845
|
FSTL3 (Follistatin-like 3) is an activin and myostatin antagonist whose physiological role in adults remains to be determined.
|
486 |
17229845
|
We found that homozygous FSTL3 knockout adults developed a distinct group of metabolic phenotypes, including increased pancreatic islet number and size, beta cell hyperplasia, decreased visceral fat mass, improved glucose tolerance, and enhanced insulin sensitivity, changes that might benefit obese, insulin-resistant patients.
|
487 |
17229845
|
This combination of phenotypes appears to arise from increased activin and myostatin bioactivity in specific tissues resulting from the absence of the FSTL3 antagonist.
|
488 |
17229845
|
Reduced visceral fat is consistent with a role for increased myostatin action in regulating fat deposition, which, in turn, may be partly responsible for the enhanced glucose tolerance and insulin sensitivity.
|
489 |
17229845
|
Our results demonstrate that FSTL3 regulation of activin and myostatin is critical for normal adult metabolic homeostasis, suggesting that pharmacological manipulation of FSTL3 activity might simultaneously reduce visceral adiposity, increase beta cell mass, and improve insulin sensitivity.
|
490 |
17229845
|
FSTL3 deletion reveals roles for TGF-beta family ligands in glucose and fat homeostasis in adults.
|
491 |
17229845
|
Activin and myostatin are related members of the TGF-beta growth factor superfamily.
|
492 |
17229845
|
FSTL3 (Follistatin-like 3) is an activin and myostatin antagonist whose physiological role in adults remains to be determined.
|
493 |
17229845
|
We found that homozygous FSTL3 knockout adults developed a distinct group of metabolic phenotypes, including increased pancreatic islet number and size, beta cell hyperplasia, decreased visceral fat mass, improved glucose tolerance, and enhanced insulin sensitivity, changes that might benefit obese, insulin-resistant patients.
|
494 |
17229845
|
This combination of phenotypes appears to arise from increased activin and myostatin bioactivity in specific tissues resulting from the absence of the FSTL3 antagonist.
|
495 |
17229845
|
Reduced visceral fat is consistent with a role for increased myostatin action in regulating fat deposition, which, in turn, may be partly responsible for the enhanced glucose tolerance and insulin sensitivity.
|
496 |
17229845
|
Our results demonstrate that FSTL3 regulation of activin and myostatin is critical for normal adult metabolic homeostasis, suggesting that pharmacological manipulation of FSTL3 activity might simultaneously reduce visceral adiposity, increase beta cell mass, and improve insulin sensitivity.
|
497 |
17229845
|
FSTL3 deletion reveals roles for TGF-beta family ligands in glucose and fat homeostasis in adults.
|
498 |
17229845
|
Activin and myostatin are related members of the TGF-beta growth factor superfamily.
|
499 |
17229845
|
FSTL3 (Follistatin-like 3) is an activin and myostatin antagonist whose physiological role in adults remains to be determined.
|
500 |
17229845
|
We found that homozygous FSTL3 knockout adults developed a distinct group of metabolic phenotypes, including increased pancreatic islet number and size, beta cell hyperplasia, decreased visceral fat mass, improved glucose tolerance, and enhanced insulin sensitivity, changes that might benefit obese, insulin-resistant patients.
|
501 |
17229845
|
This combination of phenotypes appears to arise from increased activin and myostatin bioactivity in specific tissues resulting from the absence of the FSTL3 antagonist.
|
502 |
17229845
|
Reduced visceral fat is consistent with a role for increased myostatin action in regulating fat deposition, which, in turn, may be partly responsible for the enhanced glucose tolerance and insulin sensitivity.
|
503 |
17229845
|
Our results demonstrate that FSTL3 regulation of activin and myostatin is critical for normal adult metabolic homeostasis, suggesting that pharmacological manipulation of FSTL3 activity might simultaneously reduce visceral adiposity, increase beta cell mass, and improve insulin sensitivity.
|
504 |
17267584
|
Pioglitazone induces apoptosis in human vascular smooth muscle cells from diabetic patients involving the transforming growth factor-beta/activin receptor-like kinase-4/5/7/Smad2 signaling pathway.
|
505 |
17267584
|
Here, we aimed to study whether pioglitazone was able to induce apoptosis in VSMC from diabetic patients (DP) and, if so, whether the transforming growth factor (TGF)-beta1/Smad-2 pathway was involved.
|
506 |
17267584
|
This apoptotic effect was inhibited by the activin receptor-like kinase-4/5/7/Smad2 inhibitor 4-(5-benzo(1,3)dioxol-5-yl-4-pyridin-2-yl-1H-imidazol-2-yl)benzamide (SB-431542), denoting that the TGF-beta1/Smad-2 pathway was involved.
|
507 |
17267584
|
Pioglitazone rapidly increased the extracellular TGF-beta1 levels and concomitantly induced phosphorylation of Smad2 in VSMC from DP and NDP.
|
508 |
17267584
|
Pioglitazone induces apoptosis in human vascular smooth muscle cells from diabetic patients involving the transforming growth factor-beta/activin receptor-like kinase-4/5/7/Smad2 signaling pathway.
|
509 |
17267584
|
Here, we aimed to study whether pioglitazone was able to induce apoptosis in VSMC from diabetic patients (DP) and, if so, whether the transforming growth factor (TGF)-beta1/Smad-2 pathway was involved.
|
510 |
17267584
|
This apoptotic effect was inhibited by the activin receptor-like kinase-4/5/7/Smad2 inhibitor 4-(5-benzo(1,3)dioxol-5-yl-4-pyridin-2-yl-1H-imidazol-2-yl)benzamide (SB-431542), denoting that the TGF-beta1/Smad-2 pathway was involved.
|
511 |
17267584
|
Pioglitazone rapidly increased the extracellular TGF-beta1 levels and concomitantly induced phosphorylation of Smad2 in VSMC from DP and NDP.
|
512 |
17272496
|
Concomitantly, downregulation of the pancreas marker Pdx1 was recorded in activin-treated EBs, a phenomenon that was prevented by antagonizing Hedgehog signaling with Hedgehog interacting protein.
|
513 |
17303930
|
Conophylline and betacellulin-delta4: an effective combination of differentiation factors for pancreatic beta cells.
|
514 |
17303930
|
Conophylline and betacellulin-delta4 reproduce differentiation-inducing activity of activin A and betacellulin, respectively.
|
515 |
17303930
|
We examined the effect of conophylline and betacellulin-delta4 on beta cell differentiation.
|
516 |
17303930
|
In AR42J cells, conophylline and betacellulin-delta4 converted them into insulin-producing cells.
|
517 |
17303930
|
Cells treated with conophylline and betacellulin-delta4 continued to grow after differentiation.
|
518 |
17303930
|
Thus, cell number and insulin content were much greater compared to cells treated with activin A and betacellulin.
|
519 |
17303930
|
Furthermore, cells treated with conophylline and betacellulin-delta4 secreted insulin in response to glucose.
|
520 |
17303930
|
Likewise, conophylline and betacellulin-delta4 converted pancreatic ductal cells into insulin-producing cells.
|
521 |
17303930
|
Insulin content, cell number and glucose-evoked insulin secretion were significantly greater than those in cells treated with activin A and betacellulin.
|
522 |
17303930
|
Transplantation of pseudoislets prepared using ductal cells treated with conophylline and betacellulin-delta4 was able to reduce effectively the plasma glucose concentration in streptozotocin-treated nude mice.
|
523 |
17303930
|
Conophylline and betacellulin-delta4 are effective in inducing differentiation of beta cells from progenitors.
|
524 |
17303930
|
Conophylline and betacellulin-delta4: an effective combination of differentiation factors for pancreatic beta cells.
|
525 |
17303930
|
Conophylline and betacellulin-delta4 reproduce differentiation-inducing activity of activin A and betacellulin, respectively.
|
526 |
17303930
|
We examined the effect of conophylline and betacellulin-delta4 on beta cell differentiation.
|
527 |
17303930
|
In AR42J cells, conophylline and betacellulin-delta4 converted them into insulin-producing cells.
|
528 |
17303930
|
Cells treated with conophylline and betacellulin-delta4 continued to grow after differentiation.
|
529 |
17303930
|
Thus, cell number and insulin content were much greater compared to cells treated with activin A and betacellulin.
|
530 |
17303930
|
Furthermore, cells treated with conophylline and betacellulin-delta4 secreted insulin in response to glucose.
|
531 |
17303930
|
Likewise, conophylline and betacellulin-delta4 converted pancreatic ductal cells into insulin-producing cells.
|
532 |
17303930
|
Insulin content, cell number and glucose-evoked insulin secretion were significantly greater than those in cells treated with activin A and betacellulin.
|
533 |
17303930
|
Transplantation of pseudoislets prepared using ductal cells treated with conophylline and betacellulin-delta4 was able to reduce effectively the plasma glucose concentration in streptozotocin-treated nude mice.
|
534 |
17303930
|
Conophylline and betacellulin-delta4 are effective in inducing differentiation of beta cells from progenitors.
|
535 |
17303930
|
Conophylline and betacellulin-delta4: an effective combination of differentiation factors for pancreatic beta cells.
|
536 |
17303930
|
Conophylline and betacellulin-delta4 reproduce differentiation-inducing activity of activin A and betacellulin, respectively.
|
537 |
17303930
|
We examined the effect of conophylline and betacellulin-delta4 on beta cell differentiation.
|
538 |
17303930
|
In AR42J cells, conophylline and betacellulin-delta4 converted them into insulin-producing cells.
|
539 |
17303930
|
Cells treated with conophylline and betacellulin-delta4 continued to grow after differentiation.
|
540 |
17303930
|
Thus, cell number and insulin content were much greater compared to cells treated with activin A and betacellulin.
|
541 |
17303930
|
Furthermore, cells treated with conophylline and betacellulin-delta4 secreted insulin in response to glucose.
|
542 |
17303930
|
Likewise, conophylline and betacellulin-delta4 converted pancreatic ductal cells into insulin-producing cells.
|
543 |
17303930
|
Insulin content, cell number and glucose-evoked insulin secretion were significantly greater than those in cells treated with activin A and betacellulin.
|
544 |
17303930
|
Transplantation of pseudoislets prepared using ductal cells treated with conophylline and betacellulin-delta4 was able to reduce effectively the plasma glucose concentration in streptozotocin-treated nude mice.
|
545 |
17303930
|
Conophylline and betacellulin-delta4 are effective in inducing differentiation of beta cells from progenitors.
|
546 |
17510217
|
In this 36-day protocol, hESCs were treated with sodium butyrate and activin A to generate definitive endoderm coexpressing CXCR4 and Sox17, and CXCR4 and Foxa2.
|
547 |
17510217
|
The endoderm population was then converted into cellular aggregates and further differentiated to Pdx1-expressing pancreatic endoderm in the presence of epidermal growth factor, basic fibroblast growth factor, and noggin.
|
548 |
17510217
|
The aggregates were finally matured in the presence of insulin-like growth factor II and nicotinamide.
|
549 |
17652186
|
Inhibin and activin are members of the TGFbeta family that perform mutually antagonistic signaling roles in the anterior pituitary, gonads, and adrenal gland.
|
550 |
17652186
|
In this study, we demonstrate that Smad3, a key effector of activin signaling, is expressed at high levels and is constitutively activated in tumors from these mice.
|
551 |
17652186
|
The decrease in cyclinD2 levels in compound knockout mice is related to a reduction in mitogenic signaling through the phosphoinositide-3-kinase (PI3-kinase)/Akt pathway, which is required for normal cell cycle progression in tumor cells.
|
552 |
17652186
|
Loss of PI3-kinase/Akt signaling cannot be attributed to alterations in IGF expression, suggesting instead that signaling through the FSH receptor is attenuated.
|
553 |
17652186
|
Gene expression profiling in the ovaries of Madh3-/- and Inha-/-:Madh3-/- compound knockout mice supports this hypothesis and further suggests that Smad3 is specifically required for FSH to activate PI3-kinase/Akt, but not protein kinase A.
|
554 |
17652186
|
Together these observations imply that activin/Smad3 signaling is necessary for efficient signaling by FSH in Inha-/- tumor cells and that interruption of this pathway uncouples FSH from its intracellular mitogenic effectors.
|
555 |
17652186
|
Inhibin and activin are members of the TGFbeta family that perform mutually antagonistic signaling roles in the anterior pituitary, gonads, and adrenal gland.
|
556 |
17652186
|
In this study, we demonstrate that Smad3, a key effector of activin signaling, is expressed at high levels and is constitutively activated in tumors from these mice.
|
557 |
17652186
|
The decrease in cyclinD2 levels in compound knockout mice is related to a reduction in mitogenic signaling through the phosphoinositide-3-kinase (PI3-kinase)/Akt pathway, which is required for normal cell cycle progression in tumor cells.
|
558 |
17652186
|
Loss of PI3-kinase/Akt signaling cannot be attributed to alterations in IGF expression, suggesting instead that signaling through the FSH receptor is attenuated.
|
559 |
17652186
|
Gene expression profiling in the ovaries of Madh3-/- and Inha-/-:Madh3-/- compound knockout mice supports this hypothesis and further suggests that Smad3 is specifically required for FSH to activate PI3-kinase/Akt, but not protein kinase A.
|
560 |
17652186
|
Together these observations imply that activin/Smad3 signaling is necessary for efficient signaling by FSH in Inha-/- tumor cells and that interruption of this pathway uncouples FSH from its intracellular mitogenic effectors.
|
561 |
17652186
|
Inhibin and activin are members of the TGFbeta family that perform mutually antagonistic signaling roles in the anterior pituitary, gonads, and adrenal gland.
|
562 |
17652186
|
In this study, we demonstrate that Smad3, a key effector of activin signaling, is expressed at high levels and is constitutively activated in tumors from these mice.
|
563 |
17652186
|
The decrease in cyclinD2 levels in compound knockout mice is related to a reduction in mitogenic signaling through the phosphoinositide-3-kinase (PI3-kinase)/Akt pathway, which is required for normal cell cycle progression in tumor cells.
|
564 |
17652186
|
Loss of PI3-kinase/Akt signaling cannot be attributed to alterations in IGF expression, suggesting instead that signaling through the FSH receptor is attenuated.
|
565 |
17652186
|
Gene expression profiling in the ovaries of Madh3-/- and Inha-/-:Madh3-/- compound knockout mice supports this hypothesis and further suggests that Smad3 is specifically required for FSH to activate PI3-kinase/Akt, but not protein kinase A.
|
566 |
17652186
|
Together these observations imply that activin/Smad3 signaling is necessary for efficient signaling by FSH in Inha-/- tumor cells and that interruption of this pathway uncouples FSH from its intracellular mitogenic effectors.
|
567 |
17710734
|
Folliculostellate cells are targets of cytokines, peptides, and steroid hormones, and produce growth factors and cytokines, including follistatin, the dynamic regulator of follicle-stimulating hormone (FSH) production that binds activin, and limits activin signaling.
|
568 |
17710734
|
Pituitary adenylate cyclase-activating peptide (PACAP) and its receptor are found in folliculostellate cells in which they stimulate transcription of the follistatin gene through cyclic adenosine monophosphate/protein kinase A (PKA) signaling.
|
569 |
17710734
|
When PACAP increases, follistatin levels increase, and FSH-beta mRNA is reduced.
|
570 |
17710734
|
PACAP also activates gonadotrophs to stimulate transcription of the gonadotropin alpha-subunit gene and lengthen the LH-beta mRNA, presumably to prolong it half-life, and increases responsiveness to GnRH.
|
571 |
17989064
|
In vitro studies on non diabetic islets demonstrated that glucose, betacellulin, activin A, GLP-1 and insulin increased Pax4 mRNA levels.
|
572 |
17989064
|
Adenoviral-mediated expression of human Pax4 resulted in a small increase in Bcl-xL expression while Id2 transcript levels and cell replication were unchanged in human islets.
|
573 |
17989064
|
Treatment of islets with 5-Aza-2'-deoxycytidine induced Pax4 without stimulating Bcl-xL and Id2 expression.
|
574 |
18023369
|
Differential effect of activin on mouse embryonic stem cell differentiation in insulin-secreting cells under nestin-positive selection and spontaneous differentiation protocols.
|
575 |
18023369
|
To increase the efficiency of endocrine pancreatic-like cell differentiation from mouse embryonic stem cells (ESCs), we applied activin-B to nestin-positive selection (protocol 1) and spontaneous differentiation (protocol 2) in different groups including: [A] activin-B, or [B] basic fibroblast growth factor (bFGF), and/or [C] activin-B+bFGF.
|
576 |
18023369
|
In conclusion, Addition of activin-B in a nestin-positive selection protocol increased the insulin-secreting cells in comparison with the same protocol with bFGF and/or spontaneous differentiation in presence of bFGF and/or activin-B alone.
|
577 |
18065398
|
In this system, activin, normally an endoderm inducer, caused an 80% decrease in the Foxa2-positive endoderm fraction, whereas follistatin increased the Foxa2-positive endoderm fraction to 78%.
|
578 |
18065398
|
Long-term differentiation displays a twofold reduction in hepatic gene expression and threefold reduction in hepatic protein expression of activin-treated cells compared with follistatin-treated cells.
|
579 |
18065398
|
In this system, activin, normally an endoderm inducer, caused an 80% decrease in the Foxa2-positive endoderm fraction, whereas follistatin increased the Foxa2-positive endoderm fraction to 78%.
|
580 |
18065398
|
Long-term differentiation displays a twofold reduction in hepatic gene expression and threefold reduction in hepatic protein expression of activin-treated cells compared with follistatin-treated cells.
|
581 |
18223258
|
Smad and p38 MAP kinase-mediated signaling of proteoglycan synthesis in vascular smooth muscle.
|
582 |
18223258
|
This pathway was investigated using the activin receptor-like kinase 5 (ALK5) inhibitor SB431542 and inhibitors of p38 MAP kinase as a possible downstream or alternative mediator.
|
583 |
18223258
|
TGF-beta stimulated and SB431542 inhibited the phosphorylation of Smad2/3.
|
584 |
18223258
|
Two different p38 MAP kinase inhibitors, SB203580 and SB202190, but not the inactive analogue SB202474, concentration-dependently blocked TGF-beta-mediated [(35)S]sulfate incorporation.
|
585 |
18223258
|
TGF-beta increased [(3)H]glucosamine incorporation into glycosaminoglycans by 180% and [(35)S]Met/Cys incorporation into proteoglycan core proteins by 35% with both effects completely inhibited by SB431542.
|
586 |
18223258
|
Blocking both Smad2/3 and p38 MAP kinase pathways prevented the effect of TGF-beta to increase proteoglycan to LDL binding.
|
587 |
18223258
|
TGF-beta mediates its effects on proteoglycan synthesis in VSMCs via the ALK5/Smad2/3 phosphorylation pathway as well as via the p38 MAP kinase signaling cascade.
|
588 |
18506084
|
Up-regulation of JAM-1 in AR42J cells treated with activin A and betacellulin and the diabetic regenerating islets.
|
589 |
18506084
|
The expression level of JAM-1 showed an up-regulation in the mRNA level after 3 hours and in the protein level after 24 hours in [activin A + betacellulin]-treated AR42J cells.
|
590 |
18506084
|
The expressions of its signaling molecules, PAR-3 and atypical PKC lambda, also increased after the addition of activin A + betacellulin.
|
591 |
18506084
|
When JAM-1 was over-expressed in [activin A + betacellulin]-treated AR42J cells, tagged-JAM-1 was observed in cytoplasm as vesicular structures and JAM-1 was colocalized with Rab3B and Rab13, members of the Rab family expressed at tight junctions.
|
592 |
18506084
|
Up-regulation of JAM-1 in AR42J cells treated with activin A and betacellulin and the diabetic regenerating islets.
|
593 |
18506084
|
The expression level of JAM-1 showed an up-regulation in the mRNA level after 3 hours and in the protein level after 24 hours in [activin A + betacellulin]-treated AR42J cells.
|
594 |
18506084
|
The expressions of its signaling molecules, PAR-3 and atypical PKC lambda, also increased after the addition of activin A + betacellulin.
|
595 |
18506084
|
When JAM-1 was over-expressed in [activin A + betacellulin]-treated AR42J cells, tagged-JAM-1 was observed in cytoplasm as vesicular structures and JAM-1 was colocalized with Rab3B and Rab13, members of the Rab family expressed at tight junctions.
|
596 |
18506084
|
Up-regulation of JAM-1 in AR42J cells treated with activin A and betacellulin and the diabetic regenerating islets.
|
597 |
18506084
|
The expression level of JAM-1 showed an up-regulation in the mRNA level after 3 hours and in the protein level after 24 hours in [activin A + betacellulin]-treated AR42J cells.
|
598 |
18506084
|
The expressions of its signaling molecules, PAR-3 and atypical PKC lambda, also increased after the addition of activin A + betacellulin.
|
599 |
18506084
|
When JAM-1 was over-expressed in [activin A + betacellulin]-treated AR42J cells, tagged-JAM-1 was observed in cytoplasm as vesicular structures and JAM-1 was colocalized with Rab3B and Rab13, members of the Rab family expressed at tight junctions.
|
600 |
18506084
|
Up-regulation of JAM-1 in AR42J cells treated with activin A and betacellulin and the diabetic regenerating islets.
|
601 |
18506084
|
The expression level of JAM-1 showed an up-regulation in the mRNA level after 3 hours and in the protein level after 24 hours in [activin A + betacellulin]-treated AR42J cells.
|
602 |
18506084
|
The expressions of its signaling molecules, PAR-3 and atypical PKC lambda, also increased after the addition of activin A + betacellulin.
|
603 |
18506084
|
When JAM-1 was over-expressed in [activin A + betacellulin]-treated AR42J cells, tagged-JAM-1 was observed in cytoplasm as vesicular structures and JAM-1 was colocalized with Rab3B and Rab13, members of the Rab family expressed at tight junctions.
|
604 |
18951876
|
Insulin gene is a target in activin receptor-like kinase 7 signaling pathway in pancreatic beta-cells.
|
605 |
18951876
|
In this study, human insulin promoter was activated by Smad2, Smad3 and the pancreatic and duodenal homeobox factor-1 (PDX-1) in the ALK7 pathway.
|
606 |
18951876
|
Phosphorylated Smad2/Smad3 and PDX-1 were bound to insulin gene with Nodal and Activin AB, and the phosphorylated Smad2/Smad3 interacted with PDX-1.
|
607 |
18951876
|
These results indicate that one of the direct target genes of Nodal and Activin AB signals is the insulin gene in pancreatic beta-cells and that PDX-1 is directly involved in the ALK7-Smad pathway.
|
608 |
19128983
|
Adiponectin upregulates monocytic activin A but systemic levels are not altered in obesity or type 2 diabetes.
|
609 |
19128983
|
Adiponectin and activin A reduce foam cell formation and adiponectin activates the p38 MAPK pathway that is well described to induce activin A.
|
610 |
19128983
|
Therefore, it was analyzed whether adiponectin alters activin A in primary human monocytes.
|
611 |
19128983
|
Adiponectin dose- and time-dependently induced activin A in the supernatant, and the maximal amount was observed after 12h of incubation.
|
612 |
19128983
|
Adiponectin-stimulated release of activin A was blocked by a p38 MAPK inhibitor.
|
613 |
19128983
|
Furthermore, activin A did not correlate to systemic adiponectin, body mass index, waist to hip ratio or C-reactive protein.
|
614 |
19128983
|
These findings indicate that adiponectin upregulates monocytic activin A release via the p38 MAPK pathway, and this may in part explain the immunoregulatory and antiatherosclerotic effects of this adipokine.
|
615 |
19128983
|
Adiponectin upregulates monocytic activin A but systemic levels are not altered in obesity or type 2 diabetes.
|
616 |
19128983
|
Adiponectin and activin A reduce foam cell formation and adiponectin activates the p38 MAPK pathway that is well described to induce activin A.
|
617 |
19128983
|
Therefore, it was analyzed whether adiponectin alters activin A in primary human monocytes.
|
618 |
19128983
|
Adiponectin dose- and time-dependently induced activin A in the supernatant, and the maximal amount was observed after 12h of incubation.
|
619 |
19128983
|
Adiponectin-stimulated release of activin A was blocked by a p38 MAPK inhibitor.
|
620 |
19128983
|
Furthermore, activin A did not correlate to systemic adiponectin, body mass index, waist to hip ratio or C-reactive protein.
|
621 |
19128983
|
These findings indicate that adiponectin upregulates monocytic activin A release via the p38 MAPK pathway, and this may in part explain the immunoregulatory and antiatherosclerotic effects of this adipokine.
|
622 |
19128983
|
Adiponectin upregulates monocytic activin A but systemic levels are not altered in obesity or type 2 diabetes.
|
623 |
19128983
|
Adiponectin and activin A reduce foam cell formation and adiponectin activates the p38 MAPK pathway that is well described to induce activin A.
|
624 |
19128983
|
Therefore, it was analyzed whether adiponectin alters activin A in primary human monocytes.
|
625 |
19128983
|
Adiponectin dose- and time-dependently induced activin A in the supernatant, and the maximal amount was observed after 12h of incubation.
|
626 |
19128983
|
Adiponectin-stimulated release of activin A was blocked by a p38 MAPK inhibitor.
|
627 |
19128983
|
Furthermore, activin A did not correlate to systemic adiponectin, body mass index, waist to hip ratio or C-reactive protein.
|
628 |
19128983
|
These findings indicate that adiponectin upregulates monocytic activin A release via the p38 MAPK pathway, and this may in part explain the immunoregulatory and antiatherosclerotic effects of this adipokine.
|
629 |
19128983
|
Adiponectin upregulates monocytic activin A but systemic levels are not altered in obesity or type 2 diabetes.
|
630 |
19128983
|
Adiponectin and activin A reduce foam cell formation and adiponectin activates the p38 MAPK pathway that is well described to induce activin A.
|
631 |
19128983
|
Therefore, it was analyzed whether adiponectin alters activin A in primary human monocytes.
|
632 |
19128983
|
Adiponectin dose- and time-dependently induced activin A in the supernatant, and the maximal amount was observed after 12h of incubation.
|
633 |
19128983
|
Adiponectin-stimulated release of activin A was blocked by a p38 MAPK inhibitor.
|
634 |
19128983
|
Furthermore, activin A did not correlate to systemic adiponectin, body mass index, waist to hip ratio or C-reactive protein.
|
635 |
19128983
|
These findings indicate that adiponectin upregulates monocytic activin A release via the p38 MAPK pathway, and this may in part explain the immunoregulatory and antiatherosclerotic effects of this adipokine.
|
636 |
19128983
|
Adiponectin upregulates monocytic activin A but systemic levels are not altered in obesity or type 2 diabetes.
|
637 |
19128983
|
Adiponectin and activin A reduce foam cell formation and adiponectin activates the p38 MAPK pathway that is well described to induce activin A.
|
638 |
19128983
|
Therefore, it was analyzed whether adiponectin alters activin A in primary human monocytes.
|
639 |
19128983
|
Adiponectin dose- and time-dependently induced activin A in the supernatant, and the maximal amount was observed after 12h of incubation.
|
640 |
19128983
|
Adiponectin-stimulated release of activin A was blocked by a p38 MAPK inhibitor.
|
641 |
19128983
|
Furthermore, activin A did not correlate to systemic adiponectin, body mass index, waist to hip ratio or C-reactive protein.
|
642 |
19128983
|
These findings indicate that adiponectin upregulates monocytic activin A release via the p38 MAPK pathway, and this may in part explain the immunoregulatory and antiatherosclerotic effects of this adipokine.
|
643 |
19128983
|
Adiponectin upregulates monocytic activin A but systemic levels are not altered in obesity or type 2 diabetes.
|
644 |
19128983
|
Adiponectin and activin A reduce foam cell formation and adiponectin activates the p38 MAPK pathway that is well described to induce activin A.
|
645 |
19128983
|
Therefore, it was analyzed whether adiponectin alters activin A in primary human monocytes.
|
646 |
19128983
|
Adiponectin dose- and time-dependently induced activin A in the supernatant, and the maximal amount was observed after 12h of incubation.
|
647 |
19128983
|
Adiponectin-stimulated release of activin A was blocked by a p38 MAPK inhibitor.
|
648 |
19128983
|
Furthermore, activin A did not correlate to systemic adiponectin, body mass index, waist to hip ratio or C-reactive protein.
|
649 |
19128983
|
These findings indicate that adiponectin upregulates monocytic activin A release via the p38 MAPK pathway, and this may in part explain the immunoregulatory and antiatherosclerotic effects of this adipokine.
|
650 |
19128983
|
Adiponectin upregulates monocytic activin A but systemic levels are not altered in obesity or type 2 diabetes.
|
651 |
19128983
|
Adiponectin and activin A reduce foam cell formation and adiponectin activates the p38 MAPK pathway that is well described to induce activin A.
|
652 |
19128983
|
Therefore, it was analyzed whether adiponectin alters activin A in primary human monocytes.
|
653 |
19128983
|
Adiponectin dose- and time-dependently induced activin A in the supernatant, and the maximal amount was observed after 12h of incubation.
|
654 |
19128983
|
Adiponectin-stimulated release of activin A was blocked by a p38 MAPK inhibitor.
|
655 |
19128983
|
Furthermore, activin A did not correlate to systemic adiponectin, body mass index, waist to hip ratio or C-reactive protein.
|
656 |
19128983
|
These findings indicate that adiponectin upregulates monocytic activin A release via the p38 MAPK pathway, and this may in part explain the immunoregulatory and antiatherosclerotic effects of this adipokine.
|
657 |
19295913
|
Myostatin inhibition in muscle, but not adipose tissue, decreases fat mass and improves insulin sensitivity.
|
658 |
19295913
|
To determine how Mstn deletion causes reduced adiposity and resistance to obesity, we analyzed substrate utilization and insulin sensitivity in Mstn(-/-) mice fed a standard chow.
|
659 |
19295913
|
In contrast, Mstn(-/-) mice had increased glucose utilization and insulin sensitivity as measured by indirect calorimetry, glucose and insulin tolerance tests, and hyperinsulinemic-euglycemic clamp.
|
660 |
19295913
|
To determine whether these metabolic effects were due primarily to the loss of myostatin signaling in muscle or adipose tissue, we compared two transgenic mouse lines carrying a dominant negative activin IIB receptor expressed specifically in adipocytes or skeletal muscle.
|
661 |
19295913
|
We found that inhibition of myostatin signaling in adipose tissue had no effect on body composition, weight gain, or glucose and insulin tolerance in mice fed a standard diet or a high-fat diet.
|
662 |
19295913
|
Our results demonstrate that Mstn(-/-) mice have an increase in insulin sensitivity and glucose uptake, and that the reduction in adipose tissue mass in Mstn(-/-) mice is an indirect result of metabolic changes in skeletal muscle.
|
663 |
19395281
|
Endoglin is an accessory receptor molecule that, in association with transforming growth factor beta (TGF-beta) family receptors Types I and II, binds TGF-beta1, TGF-beta3, activin A, bone morphogenetic protein (BMP)-2 and BMP-7, regulating TGF-beta dependent cellular responses.
|
664 |
19544420
|
Using a two-step culture condition combined with nicotinamide, activin, and/or GLP-1, we differentiated HEACs into insulin-secreting cells and examined in vivo effects of differentiated cells by transplantation experiments.
|
665 |
19582775
|
Role of Smad3, acting independently of transforming growth factor-beta, in the early induction of Wnt-beta-catenin signaling by parathyroid hormone in mouse osteoblastic cells.
|
666 |
19582775
|
We showed previously that PTH interacts with the canonical Wnt-beta-catenin signaling pathway via the transforming growth factor (TGF)-beta signaling molecule, Smad3, to modulate osteoblast differentiation and apoptosis.
|
667 |
19582775
|
Here, we examined which actions of Smad3 are TGF-beta-independent in stimulating the osteoblast phenotype and PTH-induced Wnt-beta-catenin signaling.
|
668 |
19582775
|
For this, the TGF-beta receptor type 1 [activin receptor-like kinase (ALK5)] inhibitor (SB431542), and a Smad3 mutant in which the site normally phosphorylated by ALK5 is mutated from SSVS to AAVA, was used.
|
669 |
19582775
|
PTH induced total beta-catenin and reduced phosphorylated beta-catenin levels at 1, 6, and 24 h in mouse osteoblastic MC3T3-E1 cells.
|
670 |
19582775
|
Transient transfection of Smad3AAVA inhibited the PTH induction of total beta-catenin and reduction of phosphorylated beta-catenin levels at 6 and 24 h, but not at 1 h, indicating that the early effects occur independently of TGF-beta receptor signaling.
|
671 |
19582775
|
On the other hand, MC3T3-E1 cell clones in which Smad3AAVA was stably expressed demonstrated elevated beta-catenin levels, although alkaline phosphatase (ALP) activity and mineralization were unaltered.
|
672 |
19582775
|
In contrast, MC3T3-E1 cell clones in which wild-type Smad3 was stably expressed exhibited increased ALP activity and mineralization that were decreased by the ALK5 inhibitor, SB431542, although the beta-catenin levels induced in these cells were not modulated.
|
673 |
19582775
|
In conclusion, the present study indicates that PTH induces osteoblast beta-catenin levels via Smad3 independently of, and dependently on, TGF-beta in the early and later induction phases, respectively.
|
674 |
19668253
|
The effects of a soluble activin type IIB receptor on obesity and insulin sensitivity.
|
675 |
20007937
|
First-trimester follistatin-like-3 levels in pregnancies complicated by subsequent gestational diabetes mellitus.
|
676 |
20007937
|
OBJECTIVE To determine whether maternal levels of follistatin-like-3 (FSTL3), an inhibitor of activin and myostatin involved in glucose homeostasis, are altered in the first trimester of pregnancies complicated by subsequent gestational diabetes mellitus (GDM).
|
677 |
20398888
|
Two of these are VLDLR and INHBE, which showed significant increase in expression after ER stress in B cells and in primary fibroblasts.
|
678 |
20571025
|
Thrombin stimulation of proteoglycan synthesis in vascular smooth muscle is mediated by protease-activated receptor-1 transactivation of the transforming growth factor beta type I receptor.
|
679 |
20571025
|
One component of classical G-protein-coupled receptor (GPCR) signaling invokes transactivation of protein tyrosine kinase receptors such as the epidermal growth factor receptor.
|
680 |
20571025
|
We have used the model of proteoglycan synthesis to demonstrate that the signaling paradigm of GPCR signaling can be extended to include the transactivation of serine/threonine receptor, specifically the TGF-beta type I receptor (TbetaRI) also known as activin-like kinase (ALK) V.
|
681 |
20571025
|
Thrombin stimulated elongation of GAG chains and increased proteoglycan core protein expression and these responses were blocked by the TbetaRI antagonist, SB431542 and TbetaRI siRNA knockdown, as well as several protease-activated receptor (PAR)-1 antagonists.
|
682 |
20571025
|
The canonical downstream response to TGF-beta is increased C-terminal phosphorylation of the transcription factor Smad2 generating phospho-Smad2C (phosphorylation of Smad2 C-terminal region).
|
683 |
20571025
|
The proteolytically inactive thrombin mimetic thrombin-receptor activating peptide also stimulated an increase in cytosolic phospho-Smad2C.
|
684 |
20803090
|
Transcription factor 7-like 2 (TCF7L2) regulates activin receptor-like kinase 1 (ALK1)/Smad1 pathway for development of diabetic nephropathy.
|
685 |
20803090
|
This study aims to elucidate molecular interactions between activin receptor-like kinase 1 (ALK1)/Smad1 signaling pathway and transcription factor 7-like 2 (TCF7L2) in the progression of DN in vitro and in vivo.
|
686 |
20803090
|
The expressions of TCF7L2 and ALK1 were induced by advanced glycation end products (AGEs) in parallel with Smad1, phosphorylated Smad1 (pSmad1), and alpha-smooth muscle actin (α-SMA) through TGF-β1 in cultured mesangial cells.
|
687 |
20803090
|
The binding of TCF7L2 to ALK1 promoter was confirmed by chromatin immunoprecipitation assay.
|
688 |
20803090
|
Furthermore, TCF7L2 induced promoter activity of ALK1.
|
689 |
20803090
|
AGEs and TGF-β1 induced a marked increase in TCF7L2 expression in parallel with ALK1.
|
690 |
20803090
|
Overexpression of TCF7L2 increased the expressions of ALK1 and Smad1.
|
691 |
20803090
|
Inversely, TCF7L2 knockdown by siRNA suppressed α-SMA expression as well as ALK1 and Smad1.
|
692 |
20803090
|
The iNOS transgenic mice (iNOS-Tgm), which developed diabetic glomerulosclerosis resembling human diabetic nephropathy, exhibited markedly increased expressions of ALK1, TCF7L2, Smad1, pSmad1, and α-SMA in glomeruli in association with mesangial matrix expansion.
|
693 |
20803090
|
These results provide a new evidence that the TCF7L2/ALK1/Smad1 pathway plays a key role in the development of DN.
|
694 |
20803090
|
Transcription factor 7-like 2 (TCF7L2) regulates activin receptor-like kinase 1 (ALK1)/Smad1 pathway for development of diabetic nephropathy.
|
695 |
20803090
|
This study aims to elucidate molecular interactions between activin receptor-like kinase 1 (ALK1)/Smad1 signaling pathway and transcription factor 7-like 2 (TCF7L2) in the progression of DN in vitro and in vivo.
|
696 |
20803090
|
The expressions of TCF7L2 and ALK1 were induced by advanced glycation end products (AGEs) in parallel with Smad1, phosphorylated Smad1 (pSmad1), and alpha-smooth muscle actin (α-SMA) through TGF-β1 in cultured mesangial cells.
|
697 |
20803090
|
The binding of TCF7L2 to ALK1 promoter was confirmed by chromatin immunoprecipitation assay.
|
698 |
20803090
|
Furthermore, TCF7L2 induced promoter activity of ALK1.
|
699 |
20803090
|
AGEs and TGF-β1 induced a marked increase in TCF7L2 expression in parallel with ALK1.
|
700 |
20803090
|
Overexpression of TCF7L2 increased the expressions of ALK1 and Smad1.
|
701 |
20803090
|
Inversely, TCF7L2 knockdown by siRNA suppressed α-SMA expression as well as ALK1 and Smad1.
|
702 |
20803090
|
The iNOS transgenic mice (iNOS-Tgm), which developed diabetic glomerulosclerosis resembling human diabetic nephropathy, exhibited markedly increased expressions of ALK1, TCF7L2, Smad1, pSmad1, and α-SMA in glomeruli in association with mesangial matrix expansion.
|
703 |
20803090
|
These results provide a new evidence that the TCF7L2/ALK1/Smad1 pathway plays a key role in the development of DN.
|
704 |
21076077
|
Peroxisome proliferators-activated receptor gamma (PPARG) ligands improve insulin sensitivity in type 2 diabetes and polycystic ovarian syndrome (PCOS).
|
705 |
21076077
|
Despite clinical studies showing normalization of pituitary responsiveness to gonadotropin-releasing hormone (GnRH) in patients with PCOS, the precise role of PPARG in regulating the hypothalamic-pituitary-gonadal axis remains unclear.
|
706 |
21076077
|
In mouse LbetaT2 immortalized gonadotrophs, rosiglitazone treatment inhibited GnRH stimulation of the stress kinases p38MAPK and MAPKs/JNKs, but did not alter activation of ERKs, both in the presence and absence of activin.
|
707 |
21076077
|
Furthermore, p38MAPK signaling was critical for both Lhb and Fshb promoter activity, and rosiglitazone suppressed the GnRH-mediated induction of Lhb and Fshb mRNA.
|
708 |
21076077
|
Depletion of PPARG using a lentivirally encoded short hairpin RNA abolishes the effect of rosiglitazone to suppress activation of JNKs and induction of the transcription factors EGR1 and FOS as well as the gonadotropin genes Lhb and Fshb.
|
709 |
21076077
|
Lastly, we show conditional knockout of Pparg in pituitary gonadotrophs caused an increase in luteinizing hormone levels in female mice, a decrease in follicle-stimulating hormone in male mice, and a fertility defect characterized by reduced litter size.
|
710 |
21191111
|
PACAP increases alpha-subunit (Cga) and Lhb mRNAs, and it stimulates the transcription of follistatin (Fst) that, in turn, restrains activin signaling to repress Fshb and gonadotropin-releasing hormone-receptor (Gnrhr) expression as well as other activin-responsive genes.
|
711 |
21191111
|
At birth, pituitary PACAP declines and pituitary follistatin levels decrease, which together with increased gonadotropin-releasing hormone secretion allow Gnrhr and Fshb to increase and facilitate activation of the newborn gonads.
|
712 |
21191111
|
Changes in Adcyap1 expression levels in the adult pituitary may contribute to the selective rise in follicle-stimulating hormone (FSH) from age 20-30 days to the midcycle surge and to the secondary increase in FSH that occurs before estrus.
|
713 |
21353873
|
A type I receptor, which is a component of the complex, is known as an activin receptor-like kinase (ALK); currently seven ALKs (ALK1-ALK7) have been identified in humans.
|
714 |
21353873
|
Activins signaling, which is mediated by ALK4 and 7 together with ActRIIA and IIB, plays a critical role in glucose-stimulated insulin secretion, development/neogenesis, and glucose homeostatic control of pancreatic endocrine cells; the insulin gene is regulated by these signaling pathways via ALK7, which is a receptor for Activins AB and B and Nodal.
|
715 |
21353874
|
Activin receptor type IIB (ActRIIB) belongs to a type II transforming growth factor-β (TGF-β) serine/threonine kinase receptor family which is integral to the activin and myostatin signaling pathway.
|
716 |
21353874
|
Actvin and myostatin bind to activin type II receptors (ActRIIA and ActRIIB), and the glycine-serine-rich domains of type I receptors are phosphorylated by type II receptors.
|
717 |
21353874
|
Activin receptor type IIB (ActRIIB) belongs to a type II transforming growth factor-β (TGF-β) serine/threonine kinase receptor family which is integral to the activin and myostatin signaling pathway.
|
718 |
21353874
|
Actvin and myostatin bind to activin type II receptors (ActRIIA and ActRIIB), and the glycine-serine-rich domains of type I receptors are phosphorylated by type II receptors.
|
719 |
21865351
|
Energy deprivation alters in a leptin- and cortisol-independent manner circulating levels of activin A and follistatin but not myostatin in healthy males.
|
720 |
22023380
|
Mice were fed a diet containing 60% kcal from fat for 12 weeks followed by treatment with a soluble MSTN receptor derived from the activin receptor type IIB extracellular domain.
|
721 |
22056147
|
Treatment with activin A and a GSK3β inhibitor enhanced efficient endodermal differentiation, and then combined treatment with retinoic acid, a bone morphogenic protein inhibitor, and a transforming growth factor-β (TGF-β) inhibitor induced efficient differentiation of pancreatic progenitor cells from definitive endoderm.
|
722 |
22202163
|
Unlike activin A, CnP inhibited activation of cultured stellate cells and reduced the production of collagen.
|
723 |
22202163
|
In pancreatic sections obtained from 6-wk-old GK rats, CD68-positive macrophages and glial fibrillary acidic protein- and α-smooth muscle actin-positive stellate cells infiltrated into islets.
|
724 |
22306733
|
Here we show that the BMP receptor activin-like kinase 3 (Alk3) is elevated early in diseased kidneys after injury.
|
725 |
22306733
|
A structure-function analysis of the BMP-Alk3-BMP receptor, type 2 (BMPR2) ligand-receptor complex, along with synthetic organic chemistry, led us to construct a library of small peptide agonists of BMP signaling that function through the Alk3 receptor.
|
726 |
22393251
|
Here, we inhibited MSTN in adult mice with a soluble activin receptor type IIB and analysed the incorporation of new nuclei using 5-bromo-2-deoxyuridine (BrdU) labelling by isolating individual myofibres.
|
727 |
22579779
|
The constitutively activating mutation (R206H) of the BMP type 1 receptor, activin A type 1 receptor/activin-like kinase 2 (ACVR1/ALK2), underlies the molecular pathogenesis of fibrodysplasia ossificans progressiva (FOP) in which heterotopic ossification occurs in muscle tissue.
|
728 |
22579779
|
Transcriptional activity of the BMP-2 signaling molecules, Smad1/5, was increased even in the absence of exogenous BMP-2.
|
729 |
22579779
|
Endogenous BMP-2 levels positively correlated with Tmem119 levels.
|
730 |
22579779
|
A BMP-2/4 neutralizing antibody and dorsomorphin, an ALK2 inhibitor, antagonized Tmem119-enhanced alkaline phosphatase (ALP) levels.
|
731 |
22579779
|
Tmem119 siRNA antagonized the BMP-2-induced ALP and osteocalcin, but not Runx2 and Osterix, mRNAs, in C2C12 cells.
|
732 |
22579779
|
In conclusion, Tmem119 levels were increased by the FOP-associated constitutively activating ALK2 mutation in myoblasts.
|
733 |
22579779
|
The data show that Tmem119 promotes the differentiation of myoblasts into osteoblasts and the interaction with the BMP signaling pathway likely occurs downstream of Runx2 and Osterix in myoblasts.
|
734 |
22596054
|
The growth factor myostatin (MSTN) negatively regulates skeletal muscle growth, and mice with MSTN inhibition have reduced adiposity and improved insulin sensitivity.
|
735 |
22596054
|
A-ZIP/F1 lipodystrophic mice were crossed to mice expressing a dominant-negative MSTN receptor (activin receptor type IIB) in muscle.
|
736 |
22596054
|
MSTN inhibition in A-ZIP/F1 mice reduced blood glucose, serum insulin, triglyceride levels, and the rate of triglyceride synthesis, and improved insulin sensitivity.
|
737 |
22596054
|
These results show that the effect of MSTN inhibition on insulin sensitivity is not secondary to an effect on adipose mass and that MSTN inhibition may be an effective treatment for diabetes.
|
738 |
22652787
|
Hepatic oval cells can be redirected to the beta-cell linage by an appropriate combination of high extracellular glucose, specific extracellular matrix proteins (laminin and fibronectin), cytokines (activin A), and the expression of several differentiation-related transcription factors (Pdx-1, Ngn-3, MafA).
|
739 |
22750100
|
Combined treatment of CM and OA further regulates a set of downstream NF-κB target genes including angiopoietin-1, activin A, and MMP-1, all critically involved in SMC dysfunction.
|
740 |
22915381
|
Moreover, reverse transcription-polymerase chain reaction (RT-PCR) data showed increased expression of pancreatic cell markers, including insulin, Pdx1, pan polypeptide and neurogenin-3, when these cells formed pancreatic clusters in the presence of activin A, exendin-4 and retinoic acid.
|
741 |
22919367
|
Here, we present an efficacy strategy for the differentiation of mouse ES cells into insulin-producing cells (IPCs) by a two-step differentiation protocol comprising of (i) the formation of definitive endoderm in monolayer culture by activin A, and (ii) this monolayer endoderm being induced to differentiate into IPCs by nicotinamide, insulin, and laminin.
|
742 |
23116663
|
Increased glucose and insulin had no effect on base-line activin A secretion by BMNPs in culture, but pre-treatment with insulin blocked the TNF-α induced release of activin A.
|
743 |
23116663
|
Furthermore, regulation of neutrophil activin A release by insulin may also play a role in the inflammation associated with T2D.
|
744 |
23116663
|
Increased glucose and insulin had no effect on base-line activin A secretion by BMNPs in culture, but pre-treatment with insulin blocked the TNF-α induced release of activin A.
|
745 |
23116663
|
Furthermore, regulation of neutrophil activin A release by insulin may also play a role in the inflammation associated with T2D.
|
746 |
23754846
|
It has been previously shown that elastin degradation products work synergistically with transforming growth factor-beta 1 (TGF-β1) to induce osteogenesis in vascular smooth muscle cells.
|
747 |
23754846
|
Thus, the goal of this study was to analyse the effects of high concentration of glucose, elastin peptides and TGF-β1 on bone-specific markers like alkaline phosphatase (ALP), osteocalcin (OCN) and runt-related transcription factor 2 (RUNX2).
|
748 |
23754846
|
We demonstrated using relative gene expression and specific protein assays that elastin degradation products in the presence of high glucose cause the increase in expression of the specific elastin-laminin receptor-1 (ELR-1) and activin receptor-like kinase-5 (ALK-5) present on the surface of the vascular cells, in turn leading to overexpression of typical osteogenic markers like ALP, OCN and RUNX2.
|
749 |
23754846
|
In conclusion, our results indicate that glucose plays an important role in amplifying the osteogenesis induced by elastin peptides and TGF-β1, possibly by activating the ELR-1 and ALK-5 signalling pathways.
|
750 |
23838169
|
In type 1 diabetes, muscle wasting essentially results from insulin deficiency and this induces of genes involved in the ubiquitin proteasome pathway.
|
751 |
23838169
|
Decreased insulin responsiveness has been attributed to defects in the insulin signaling pathways secondary to inflammation (e.g., NF-κB activation and elevated levels of TNF-α, IL-1 and IL-6), metabolic acidosis, increased circulating free fatty acids and glucotoxicity.
|
752 |
23838169
|
Furthermore, emerging pathways, such as myostatin/activin A system are beginning to be uncovered.
|
753 |
23987834
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Interleukin-6 and activin A are independently associated with cardiovascular events and mortality in type 2 diabetes: the prospective Asker and Bærum Cardiovascular Diabetes (ABCD) cohort study.
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