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PMID |
Sentence |
1 |
21143387
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In cardiomyocytes, CM from EAT of HFD-fed animals increased SMAD2-phosphorylation, a marker for activin A-signalling, decreased sarcoplasmic-endoplasmic reticulum calcium ATPase 2a expression, and reduced insulin-mediated phosphorylation of Akt-Ser473 versus CM from SAT and standard diet-fed animals.
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2 |
2121404
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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.
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3 |
1671798
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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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4 |
2036994
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Since activin binds to follistatin, it is imperative to determine the nature of the activin/follistatin binding complex.
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5 |
2036994
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Therefore, these results suggest that follistatin binds to both activin and inhibin through the common beta-subunit.
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6 |
8462476
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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.
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7 |
8472873
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Follistatin was originally identified as a specific inhibitor of follicle stimulating hormone secretion and later characterized as a binding protein for activin.
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8 |
8472873
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Since activin regulates hormone secretion and cell differentiation, the importance of understanding the mechanisms regulating the synthesis of its binding protein, follistatin, is evident.
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9 |
8477666
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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.
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10 |
8477666
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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.
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11 |
8477666
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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.
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12 |
8333840
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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.
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13 |
7887917
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Whether the heparin-binding site of follistatin would interact with activin has been examined.
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14 |
7887917
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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.
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15 |
16934249
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Furthermore, pGL3.hINS-363 3x shows significant promoter activity in differentiated AR42J cells that can produce insulin after activin A and betacellulin treatment.
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16 |
17272496
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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.
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17 |
17457565
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Sequential treatment with serum, activin and RA highly upregulated the expression of the genes encoding forkhead box protein A2 (FOXA2), SRY-box containing gene 17 (SOX17), pancreatic and duodenal homeobox 1 (PDX1) and homeobox HB9 (HLXB9).
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18 |
18506084
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The expressions of its signaling molecules, PAR-3 and atypical PKC lambda, also increased after the addition of activin A + betacellulin.
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19 |
18506084
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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.
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20 |
19298640
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High glucose may facilitate the synthesis of activin betaA, transforming growth factor (TGF)-beta, P-Smad2/3 and fibronectin in HK-2 cells while rh-follistatin inhibited them except TGF-beta.
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21 |
20530742
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Sustained activation or inhibition of the activin A pathway impairs or promotes, respectively, adipocyte differentiation via the C/EBP?-LAP and Smad2 pathway in an autocrine/paracrine manner.
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22 |
18065398
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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%.
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23 |
18065398
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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.
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24 |
19395281
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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.
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25 |
21193740
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Increased glucose augmented expression of BMP-2 and BMP-4; the BMP inhibitors matrix Gla protein (MGP) and Noggin; activin-like kinase receptor (ALK)1, -2, -3 and -6; the BMP type 2 receptor; and the vascular endothelial growth factor in human aortic endothelial cells (HAECs).
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26 |
21464440
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Activin A effects on insulin secretion and inflammation were tested in human pancreatic islet cells. 1) In patients with acute MI, serum levels of activin A were significantly higher in those with abnormal glucose regulation (AGR) compared with those with normal glucose regulation.
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27 |
21464440
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Activin A levels were associated with the presence of AGR 3 months later (adjusted odds ratio 5.1 [95% CI 1.73-15.17], P = 0.003). 2) In endothelial cells, glucose enhanced the release of activin A, whereas activin A attenuated the release of interleukin (IL)-8 and enhanced the mRNA levels of the antioxidant metallothionein. 3) In islet cells, activin A attenuated the suppressive effect of inflammatory cytokines on insulin release, counteracted the ability of these inflammatory cytokines to induce mRNA expression of IL-8, and induced the expression of transforming growth factor-?.
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28 |
21076077
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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.
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29 |
16123344
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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).
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30 |
9436357
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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.
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31 |
21191111
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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.
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32 |
19668253
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We treated mice on chow and high-fat diets with a soluble activin receptor type IIB (ActRIIB, RAP-031), which is a putative endogenous signaling receptor for myostatin and other ligands of the TGF-beta superfamily.
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33 |
21865351
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Leptin administration reversed cortisol response (P < 0.01) but failed to alter activin A, follistatin, or myostatin concentrations.
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34 |
21865351
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Although energy deprivation-induced cortisol changes are leptin mediated, the changes in follistatin and activin A concentrations occur through a leptin-independent pathway.
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35 |
22113197
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De-differentiation of ?-cells with activin A increased Msi1 expression.
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