# |
PMID |
Sentence |
1 |
1591345
|
Regulation of pulsatile gonadotropin secretion by estrogen, inhibin, and follistatin (activin-binding protein) in ovariectomized rats.
|
2 |
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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3 |
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).
|
4 |
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.
|
5 |
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.
|
6 |
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).
|
7 |
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.
|
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.
|
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).
|
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 |
1899217
|
In vivo comparison of the follicle-stimulating hormone-suppressing activity of follistatin and inhibin in ovariectomized rats.
|
12 |
1899217
|
Data obtained from a second experiment conducted to examine the effects of inhibin and follistatin on anterior pituitary gonadotropin responses to LHRH were consistent with in vitro data showing direct pituitary effects of the gonadal polypeptides.
|
13 |
1899217
|
In vivo comparison of the follicle-stimulating hormone-suppressing activity of follistatin and inhibin in ovariectomized rats.
|
14 |
1899217
|
Data obtained from a second experiment conducted to examine the effects of inhibin and follistatin on anterior pituitary gonadotropin responses to LHRH were consistent with in vitro data showing direct pituitary effects of the gonadal polypeptides.
|
15 |
1909791
|
Follistatin and activin: a potential intrinsic regulatory system within diverse tissues.
|
16 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
17 |
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.
|
18 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
19 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
20 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
21 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
22 |
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.
|
23 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
24 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
25 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
26 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
27 |
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.
|
28 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
29 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
30 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
31 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
32 |
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.
|
33 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
34 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
35 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
36 |
2036994
|
Follistatin binds to both activin and inhibin through the common subunit.
|
37 |
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.
|
38 |
2036994
|
By contrast, the physiological significance of follistatin was obscure, until it was discovered that follistatin is a binding protein to activin.
|
39 |
2036994
|
Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
|
40 |
2036994
|
Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
|
41 |
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.
|
42 |
2121404
|
Figure 3 shows a simplistic diagram summarizing our current understanding of inhibin/activin and follistatin action along the hypothalamic-pituitary-gonadal axis.
|
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 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
46 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
47 |
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.
|
48 |
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.
|
49 |
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.
|
50 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
51 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
52 |
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.
|
53 |
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.
|
54 |
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.
|
55 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
56 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
57 |
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.
|
58 |
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.
|
59 |
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.
|
60 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
61 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
62 |
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.
|
63 |
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.
|
64 |
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.
|
65 |
7887917
|
The heparin binding site of follistatin is involved in its interaction with activin.
|
66 |
7887917
|
Whether the heparin-binding site of follistatin would interact with activin has been examined.
|
67 |
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.
|
68 |
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.
|
69 |
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.
|
70 |
8333840
|
Differential control of activin, inhibin and follistatin proteins in cultured rat granulosa cells.
|
71 |
8333840
|
Follistatin, activin and inhibin proteins are produced by granulosa cells, but the mechanisms controlling their production remain unclear.
|
72 |
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.
|
73 |
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.
|
74 |
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.
|
75 |
8333840
|
Differential control of activin, inhibin and follistatin proteins in cultured rat granulosa cells.
|
76 |
8333840
|
Follistatin, activin and inhibin proteins are produced by granulosa cells, but the mechanisms controlling their production remain unclear.
|
77 |
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.
|
78 |
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.
|
79 |
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.
|
80 |
8333840
|
Differential control of activin, inhibin and follistatin proteins in cultured rat granulosa cells.
|
81 |
8333840
|
Follistatin, activin and inhibin proteins are produced by granulosa cells, but the mechanisms controlling their production remain unclear.
|
82 |
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.
|
83 |
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.
|
84 |
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.
|
85 |
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.
|
86 |
8472873
|
Structural and functional characterization of the rat follistatin (activin-binding protein) gene promoter.
|
87 |
8472873
|
Follistatin was originally identified as a specific inhibitor of follicle stimulating hormone secretion and later characterized as a binding protein for activin.
|
88 |
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.
|
89 |
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.
|
90 |
8472873
|
Structural and functional characterization of the rat follistatin (activin-binding protein) gene promoter.
|
91 |
8472873
|
Follistatin was originally identified as a specific inhibitor of follicle stimulating hormone secretion and later characterized as a binding protein for activin.
|
92 |
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.
|
93 |
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.
|
94 |
8472873
|
Structural and functional characterization of the rat follistatin (activin-binding protein) gene promoter.
|
95 |
8472873
|
Follistatin was originally identified as a specific inhibitor of follicle stimulating hormone secretion and later characterized as a binding protein for activin.
|
96 |
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.
|
97 |
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.
|
98 |
8472873
|
Structural and functional characterization of the rat follistatin (activin-binding protein) gene promoter.
|
99 |
8472873
|
Follistatin was originally identified as a specific inhibitor of follicle stimulating hormone secretion and later characterized as a binding protein for activin.
|
100 |
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.
|
101 |
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.
|
102 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
103 |
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.
|
104 |
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.
|
105 |
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.
|
106 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
107 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
108 |
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.
|
109 |
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.
|
110 |
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.
|
111 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
112 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
113 |
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.
|
114 |
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.
|
115 |
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.
|
116 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
117 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
118 |
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.
|
119 |
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.
|
120 |
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.
|
121 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
122 |
8477666
|
Increased follistatin (activin-binding protein) gene expression in rat anterior pituitary tissue after ovariectomy may be mediated by pituitary activin.
|
123 |
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.
|
124 |
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.
|
125 |
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.
|
126 |
8477666
|
Viewed in the context of previous work, the data also suggest that changes in follistatin mRNA levels may be linked to activin signaling.
|
127 |
15180456
|
Activins, myostatin and related TGF-beta family members as novel therapeutic targets for endocrine, metabolic and immune disorders.
|
128 |
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).
|
129 |
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.
|
130 |
15232060
|
There is evidence that the intra-pituitary regulation of FSH-beta and GnRH-receptor gene expression may activate pubertal maturation in male rats.
|
131 |
15277382
|
Interestingly, the expression of endogenous cellular inhibitors of activin signaling, follistatin and Cripto, were also found to be augmented.
|
132 |
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).
|
133 |
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.
|
134 |
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.
|
135 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
136 |
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.
|
137 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
138 |
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.
|
139 |
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).
|
140 |
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.
|
141 |
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.
|
142 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
143 |
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.
|
144 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
145 |
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.
|
146 |
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).
|
147 |
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.
|
148 |
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.
|
149 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
150 |
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.
|
151 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
152 |
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.
|
153 |
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).
|
154 |
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.
|
155 |
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.
|
156 |
15319828
|
Third, activin can stimulate GnRH release from GnRH neurons in the hypothalamus and thereby affect FSH and LH secretion.
|
157 |
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.
|
158 |
15319828
|
This review concentrates on the mechanisms through which inhibin, activin, and follistatin regulate the gonadotropins.
|
159 |
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.
|
160 |
16281169
|
However, Sonic hedgehog, a known inhibitor of pancreas induction in vivo drastically increased in day 6 embryoid bodies, while Inhibin betaA and betaB were down-regulated and follistatin up-regulated.
|
161 |
16350721
|
Several genes from these pathways have been tested include genes involved in steroid hormone biosynthesis and metabolism (StAR, CYP11, CYP17, CYP19 HSD17B1-3, HSD3B1-2), gonadotropin and gonadal hormones action (ACTR1, ACTR2A-B, FS, INHA, INHBA-B, INHC, SHBG, LHCGR, FSHR, MADH4, AR), obesity and energy regulation (MC4R, OB, OBR, POMC, UCP2-3), insulin secretion and action (IGF1, IGF1R, IGFBPI1-3, INS VNTR, IR, INSL, IRS1-2, PPARG) and many others.
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162 |
16350721
|
Polymorphic alleles of both IRS-1 and IRS-2 (insulin receptor substrate 1 - 2), alone or in combination, may have a functional impact on the insulin-resistant component of PCOS.
|
163 |
16350721
|
There is no evidence to suggest that follistatin gene polymorphisms play a role in the pathogenesis of insulin resistance in PCOS women.
|
164 |
16350721
|
The results of this study demonstrate that there are significant alterations in the expression of ERalpha and ERbeta in PCOS that may be related to abnormal follicular development.
|
165 |
17229845
|
FSTL3 deletion reveals roles for TGF-beta family ligands in glucose and fat homeostasis in adults.
|
166 |
17229845
|
Activin and myostatin are related members of the TGF-beta growth factor superfamily.
|
167 |
17229845
|
FSTL3 (Follistatin-like 3) is an activin and myostatin antagonist whose physiological role in adults remains to be determined.
|
168 |
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.
|
169 |
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.
|
170 |
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.
|
171 |
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.
|
172 |
17284512
|
Acting to regulate the development of ovarian follicles and as an antagonist to aromatase activity, alterations in follistatin function or expression may result in key features of PCOS such as reduced serum FSH, impaired ovarian follicle development and augmented ovarian androgen production.
|
173 |
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.
|
174 |
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.
|
175 |
17710734
|
When PACAP increases, follistatin levels increase, and FSH-beta mRNA is reduced.
|
176 |
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.
|
177 |
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.
|
178 |
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.
|
179 |
17710734
|
When PACAP increases, follistatin levels increase, and FSH-beta mRNA is reduced.
|
180 |
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.
|
181 |
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.
|
182 |
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.
|
183 |
17710734
|
When PACAP increases, follistatin levels increase, and FSH-beta mRNA is reduced.
|
184 |
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.
|
185 |
18030501
|
Follistatin and avian myelocytomatosis viral oncogene homolog mRNA both showed a similar age-related pattern of response to DM, but protein levels did not parallel mRNA for either of these gene products.
|
186 |
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%.
|
187 |
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.
|
188 |
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%.
|
189 |
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.
|
190 |
19281773
|
Besides the expected increases in insulin, glucagon, and duct markers (mucin 6, aquaporin 1 and 5), the beta cell auto-antigen IA-2/phogrin was increased 5-fold in Differentiated.
|
191 |
19281773
|
In addition, developmentally important pathways, including notch/jagged, Wnt/frizzled, TGFbeta superfamily (follistatin, BMPs, and SMADs), and retinoic acid (COUP-TFI, CRABP1, 2, and RAIG1) were differentially regulated during the expansion/differentiation.
|
192 |
19281773
|
Two putative markers for islet precursor cells, UCHL1/PGP9.5 and DMBT1, were enhanced during the progression to differentiated cells, but only the latter could be a marker of islet precursor cells.
|
193 |
20007937
|
First-trimester follistatin-like-3 levels in pregnancies complicated by subsequent gestational diabetes mellitus.
|
194 |
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).
|
195 |
20007937
|
First-trimester follistatin-like-3 levels in pregnancies complicated by subsequent gestational diabetes mellitus.
|
196 |
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).
|
197 |
20043993
|
Downregulated expression of the secreted glycoprotein follistatin-like 1 (Fstl1) is a robust hallmark of preadipocyte to adipocyte conversion.
|
198 |
20043993
|
Time course studies in multiple adipogenesis models reveal downregulation of Fstl1 is a hallmark of white and brown adipocyte conversion.
|
199 |
20043993
|
By Western blot, we show culture media of 3T3-L1 preadipocytes contains high levels of Fstl1 protein that rapidly decline in adipocyte conversion.
|
200 |
20043993
|
Moreover, we observe a correlation between preadipocyte phenotype and Fstl1 expression in that TNFalpha-mediated de-differentiation of 3T3-L1 adipocytes is accompanied by re-expression of Fstl1 transcript and protein.
|
201 |
20043993
|
Furthermore, of 10 additional preadipocyte-expressed genes analyzed we find Pref-1, Col1A1, Sca-1/Ly6a, Lox and Thbs2, are also downregulated by 5-aza-cytidine.
|
202 |
20043993
|
Using luciferase reporter constructs containing 791 or 3922 bp of the Fstl1 5' flanking region, we determine negative transcriptional regulation by Kruppel-like factor 15.
|
203 |
20043993
|
Together, our data suggest downregulation of Fstl1 expression may be an important feature of preadipocyte to adipocyte conversion.
|
204 |
20869223
|
Hence, the present investigation evaluates the antidepressant effect of mitragynine in the mouse forced swim test (FST) and tail suspension test (TST), two models predictive of antidepressant activity and the effect of mitragynine towards neuroendocrine system of hypothalamic-pituitary-adrenal (HPA) axis by measuring the corticosterone concentration of mice exposed to FST and TST.
|
205 |
20869223
|
An open-field test (OFT) was used to detect any association of immobility in the FST and TST with changes in motor activity of mice treated with mitragynine.
|
206 |
20869223
|
In the present study, mitragynine at dose of 10 mg/kg and 30 mg/kg i.p. injected significantly reduced the immobility time of mice in both FST and TST without any significant effect on locomotor activity in OFT.
|
207 |
20869223
|
Moreover, mitragynine significantly reduced the released of corticosterone in mice exposed to FST and TST at dose of 10 mg/kg and 30 mg/kg.
|
208 |
20869223
|
Overall, the present study clearly demonstrated that mitragynine exerts an antidepressant effect in animal behavioral model of depression (FST and TST) and the effect appears to be mediated by an interaction with neuroendocrine HPA axis systems.
|
209 |
20869223
|
Hence, the present investigation evaluates the antidepressant effect of mitragynine in the mouse forced swim test (FST) and tail suspension test (TST), two models predictive of antidepressant activity and the effect of mitragynine towards neuroendocrine system of hypothalamic-pituitary-adrenal (HPA) axis by measuring the corticosterone concentration of mice exposed to FST and TST.
|
210 |
20869223
|
An open-field test (OFT) was used to detect any association of immobility in the FST and TST with changes in motor activity of mice treated with mitragynine.
|
211 |
20869223
|
In the present study, mitragynine at dose of 10 mg/kg and 30 mg/kg i.p. injected significantly reduced the immobility time of mice in both FST and TST without any significant effect on locomotor activity in OFT.
|
212 |
20869223
|
Moreover, mitragynine significantly reduced the released of corticosterone in mice exposed to FST and TST at dose of 10 mg/kg and 30 mg/kg.
|
213 |
20869223
|
Overall, the present study clearly demonstrated that mitragynine exerts an antidepressant effect in animal behavioral model of depression (FST and TST) and the effect appears to be mediated by an interaction with neuroendocrine HPA axis systems.
|
214 |
20869223
|
Hence, the present investigation evaluates the antidepressant effect of mitragynine in the mouse forced swim test (FST) and tail suspension test (TST), two models predictive of antidepressant activity and the effect of mitragynine towards neuroendocrine system of hypothalamic-pituitary-adrenal (HPA) axis by measuring the corticosterone concentration of mice exposed to FST and TST.
|
215 |
20869223
|
An open-field test (OFT) was used to detect any association of immobility in the FST and TST with changes in motor activity of mice treated with mitragynine.
|
216 |
20869223
|
In the present study, mitragynine at dose of 10 mg/kg and 30 mg/kg i.p. injected significantly reduced the immobility time of mice in both FST and TST without any significant effect on locomotor activity in OFT.
|
217 |
20869223
|
Moreover, mitragynine significantly reduced the released of corticosterone in mice exposed to FST and TST at dose of 10 mg/kg and 30 mg/kg.
|
218 |
20869223
|
Overall, the present study clearly demonstrated that mitragynine exerts an antidepressant effect in animal behavioral model of depression (FST and TST) and the effect appears to be mediated by an interaction with neuroendocrine HPA axis systems.
|
219 |
20869223
|
Hence, the present investigation evaluates the antidepressant effect of mitragynine in the mouse forced swim test (FST) and tail suspension test (TST), two models predictive of antidepressant activity and the effect of mitragynine towards neuroendocrine system of hypothalamic-pituitary-adrenal (HPA) axis by measuring the corticosterone concentration of mice exposed to FST and TST.
|
220 |
20869223
|
An open-field test (OFT) was used to detect any association of immobility in the FST and TST with changes in motor activity of mice treated with mitragynine.
|
221 |
20869223
|
In the present study, mitragynine at dose of 10 mg/kg and 30 mg/kg i.p. injected significantly reduced the immobility time of mice in both FST and TST without any significant effect on locomotor activity in OFT.
|
222 |
20869223
|
Moreover, mitragynine significantly reduced the released of corticosterone in mice exposed to FST and TST at dose of 10 mg/kg and 30 mg/kg.
|
223 |
20869223
|
Overall, the present study clearly demonstrated that mitragynine exerts an antidepressant effect in animal behavioral model of depression (FST and TST) and the effect appears to be mediated by an interaction with neuroendocrine HPA axis systems.
|
224 |
20869223
|
Hence, the present investigation evaluates the antidepressant effect of mitragynine in the mouse forced swim test (FST) and tail suspension test (TST), two models predictive of antidepressant activity and the effect of mitragynine towards neuroendocrine system of hypothalamic-pituitary-adrenal (HPA) axis by measuring the corticosterone concentration of mice exposed to FST and TST.
|
225 |
20869223
|
An open-field test (OFT) was used to detect any association of immobility in the FST and TST with changes in motor activity of mice treated with mitragynine.
|
226 |
20869223
|
In the present study, mitragynine at dose of 10 mg/kg and 30 mg/kg i.p. injected significantly reduced the immobility time of mice in both FST and TST without any significant effect on locomotor activity in OFT.
|
227 |
20869223
|
Moreover, mitragynine significantly reduced the released of corticosterone in mice exposed to FST and TST at dose of 10 mg/kg and 30 mg/kg.
|
228 |
20869223
|
Overall, the present study clearly demonstrated that mitragynine exerts an antidepressant effect in animal behavioral model of depression (FST and TST) and the effect appears to be mediated by an interaction with neuroendocrine HPA axis systems.
|
229 |
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.
|
230 |
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.
|
231 |
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.
|
232 |
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.
|
233 |
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.
|
234 |
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.
|
235 |
21622850
|
Follistatin-like 1 in chronic systolic heart failure: a marker of left ventricular remodeling.
|
236 |
21865351
|
Energy deprivation alters in a leptin- and cortisol-independent manner circulating levels of activin A and follistatin but not myostatin in healthy males.
|
237 |
22087027
|
The type 1 insulin-like growth factor receptor (IGF-IR) pathway is mandatory for the follistatin-induced skeletal muscle hypertrophy.
|
238 |
22087027
|
Myostatin inhibition by follistatin (FS) offers a new approach for muscle mass enhancement.
|
239 |
22087027
|
Because IGF-I and IGF-II, two crucial skeletal muscle growth factors, are induced by myostatin inhibition, we assessed their role in FS action.
|
240 |
22087027
|
We then tested the role of the signaling molecules stimulated by IGF-IR, in particular the Akt/mammalian target of rapamycin (mTOR)/70-kDa ribosomal protein S6 kinase (S6K) pathway.
|
241 |
22087027
|
In conclusion, the IGF-IR/Akt/mTOR pathway plays a critical role in FS-induced muscle hypertrophy.
|
242 |
22087027
|
In contrast, induction of IGF-II expression and S6K activity by FS are not required for the hypertrophic action of FS.
|
243 |
22087027
|
The type 1 insulin-like growth factor receptor (IGF-IR) pathway is mandatory for the follistatin-induced skeletal muscle hypertrophy.
|
244 |
22087027
|
Myostatin inhibition by follistatin (FS) offers a new approach for muscle mass enhancement.
|
245 |
22087027
|
Because IGF-I and IGF-II, two crucial skeletal muscle growth factors, are induced by myostatin inhibition, we assessed their role in FS action.
|
246 |
22087027
|
We then tested the role of the signaling molecules stimulated by IGF-IR, in particular the Akt/mammalian target of rapamycin (mTOR)/70-kDa ribosomal protein S6 kinase (S6K) pathway.
|
247 |
22087027
|
In conclusion, the IGF-IR/Akt/mTOR pathway plays a critical role in FS-induced muscle hypertrophy.
|
248 |
22087027
|
In contrast, induction of IGF-II expression and S6K activity by FS are not required for the hypertrophic action of FS.
|
249 |
22689209
|
The same results were observed in patients who underwent both FST and SIT.
|
250 |
22711699
|
Follistatin-mediated skeletal muscle hypertrophy is regulated by Smad3 and mTOR independently of myostatin.
|
251 |
22711699
|
Furthermore, we identify Smad3 as the critical intracellular link that mediates the effects of follistatin on mTOR signaling.
|
252 |
22711699
|
Expression of constitutively active Smad3 not only markedly prevented skeletal muscle growth induced by follistatin but also potently suppressed follistatin-induced Akt/mTOR/S6K signaling.
|
253 |
22711699
|
Importantly, the regulation of Smad3- and mTOR-dependent events by follistatin occurred independently of overexpression or knockout of myostatin, a key repressor of muscle development that can regulate Smad3 and mTOR signaling and that is itself inhibited by follistatin.
|
254 |
22711699
|
These findings identify a critical role of Smad3/Akt/mTOR/S6K/S6RP signaling in follistatin-mediated muscle growth that operates independently of myostatin-driven mechanisms.
|
255 |
22711699
|
Follistatin-mediated skeletal muscle hypertrophy is regulated by Smad3 and mTOR independently of myostatin.
|
256 |
22711699
|
Furthermore, we identify Smad3 as the critical intracellular link that mediates the effects of follistatin on mTOR signaling.
|
257 |
22711699
|
Expression of constitutively active Smad3 not only markedly prevented skeletal muscle growth induced by follistatin but also potently suppressed follistatin-induced Akt/mTOR/S6K signaling.
|
258 |
22711699
|
Importantly, the regulation of Smad3- and mTOR-dependent events by follistatin occurred independently of overexpression or knockout of myostatin, a key repressor of muscle development that can regulate Smad3 and mTOR signaling and that is itself inhibited by follistatin.
|
259 |
22711699
|
These findings identify a critical role of Smad3/Akt/mTOR/S6K/S6RP signaling in follistatin-mediated muscle growth that operates independently of myostatin-driven mechanisms.
|
260 |
22711699
|
Follistatin-mediated skeletal muscle hypertrophy is regulated by Smad3 and mTOR independently of myostatin.
|
261 |
22711699
|
Furthermore, we identify Smad3 as the critical intracellular link that mediates the effects of follistatin on mTOR signaling.
|
262 |
22711699
|
Expression of constitutively active Smad3 not only markedly prevented skeletal muscle growth induced by follistatin but also potently suppressed follistatin-induced Akt/mTOR/S6K signaling.
|
263 |
22711699
|
Importantly, the regulation of Smad3- and mTOR-dependent events by follistatin occurred independently of overexpression or knockout of myostatin, a key repressor of muscle development that can regulate Smad3 and mTOR signaling and that is itself inhibited by follistatin.
|
264 |
22711699
|
These findings identify a critical role of Smad3/Akt/mTOR/S6K/S6RP signaling in follistatin-mediated muscle growth that operates independently of myostatin-driven mechanisms.
|
265 |
22711699
|
Follistatin-mediated skeletal muscle hypertrophy is regulated by Smad3 and mTOR independently of myostatin.
|
266 |
22711699
|
Furthermore, we identify Smad3 as the critical intracellular link that mediates the effects of follistatin on mTOR signaling.
|
267 |
22711699
|
Expression of constitutively active Smad3 not only markedly prevented skeletal muscle growth induced by follistatin but also potently suppressed follistatin-induced Akt/mTOR/S6K signaling.
|
268 |
22711699
|
Importantly, the regulation of Smad3- and mTOR-dependent events by follistatin occurred independently of overexpression or knockout of myostatin, a key repressor of muscle development that can regulate Smad3 and mTOR signaling and that is itself inhibited by follistatin.
|
269 |
22711699
|
These findings identify a critical role of Smad3/Akt/mTOR/S6K/S6RP signaling in follistatin-mediated muscle growth that operates independently of myostatin-driven mechanisms.
|
270 |
22711699
|
Follistatin-mediated skeletal muscle hypertrophy is regulated by Smad3 and mTOR independently of myostatin.
|
271 |
22711699
|
Furthermore, we identify Smad3 as the critical intracellular link that mediates the effects of follistatin on mTOR signaling.
|
272 |
22711699
|
Expression of constitutively active Smad3 not only markedly prevented skeletal muscle growth induced by follistatin but also potently suppressed follistatin-induced Akt/mTOR/S6K signaling.
|
273 |
22711699
|
Importantly, the regulation of Smad3- and mTOR-dependent events by follistatin occurred independently of overexpression or knockout of myostatin, a key repressor of muscle development that can regulate Smad3 and mTOR signaling and that is itself inhibited by follistatin.
|
274 |
22711699
|
These findings identify a critical role of Smad3/Akt/mTOR/S6K/S6RP signaling in follistatin-mediated muscle growth that operates independently of myostatin-driven mechanisms.
|
275 |
23395958
|
'See-saw' expression of microRNA-198 and FSTL1 from a single transcript in wound healing.
|
276 |
23395958
|
Expression of primate-specific exonic microRNA-198 (miR-198), located in the 3'-untranslated region of follistatin-like 1 (FSTL1) messenger RNA, switches to expression of the linked open reading frame of FSTL1 upon wounding in a human ex vivo organ culture system.
|
277 |
23395958
|
We show that binding of a KH-type splicing regulatory protein (KSRP, also known as KHSRP) to the primary transcript determines the fate of the transcript and is essential for the processing of miR-198: transforming growth factor-β signalling switches off miR-198 expression by downregulating KSRP, and promotes FSTL1 protein expression.
|
278 |
23395958
|
We also show that FSTL1 expression promotes keratinocyte migration, whereas miR-198 expression has the opposite effect by targeting and inhibiting DIAPH1, PLAU and LAMC2.
|
279 |
23395958
|
A clear inverse correlation between the expression pattern of FSTL1 (pro-migratory) and miR-198 (anti-migratory) highlights the importance of this regulatory switch in controlling context-specific gene expression to orchestrate wound re-epithelialization.
|
280 |
23395958
|
The deleterious effect of failure of this switch is apparent in non-healing chronic diabetic ulcers, in which expression of miR-198 persists, FSTL1 is absent, and keratinocyte migration, re-epithelialization and wound healing all fail to occur.
|
281 |
23419164
|
Follistatin-like protein 1 (Fstl1) is a secreted glycoprotein of the follistatin family.
|
282 |
23419164
|
Fstl1 is secreted by C2C12 cells, and Akt1 over-expression in skeletal muscle leads to its induction in muscle and increased circulating levels.
|
283 |
23419164
|
Furthermore, IFNγ and IL-1β significantly increase Fstl1 secretion.
|