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• W2135473313 startingPage "535" @default.
• W2135473313 abstract "Activins are growth and differentiation factors which have been shown to have proliferative and antiproliferative actions in many tissues. In addition, they have been implicated in tumourigenesis in reproductive tissues. Although activin and inhibin are present in rat ventral prostate, inhibin beta, but not alpha, subunit proteins have been detected in the human prostate epithelial tumour cell lines LNCaP, DU145 and PC3. With this absence of capacity to produce inhibins, the aims of this study were to determine the effect of activin A and B and follistatin on DNA synthesis by these human prostate tumour cell lines. The results demonstrate a differential response to exogenously added activin A and B on DNA synthesis in vitro by the tumour cell lines. The inhibitory effects were observed on LNCaP cells in the absence or presence of stimulation with 1 nM 5 alpha-dihydrotestosterone and on the androgen-independent DU145 cells, but not the PC3 cells. Activin A caused a dose-dependent inhibition of DNA synthesis and proliferation by LNCaP and androgen-independent DU145 cells which was maximal at 8 ng/ml. The effect of exogenously added activin A was completely reversed by follistatin, but not by inhibin A. The addition of human recombinant FS 288 alone (400 ng/ml) did not have any effect on DNA synthesis, whereas inhibin A alone (400 ng/ml) caused a significant inhibition of DNA synthesis. The capacity of all three cell lines to produce activins and follistatins was demonstrated by the expression of the mRNAs and confirmed by the localisation of immunoreactivity for these ligands to the cytoplasm of the tumour cells. The growth inhibitory response to activins A and B by LNCaP and DU145 cells, and the ability of follistatin to block these effects, suggest that the autocrine interactions between activins and follistatins have a role in the regulation of LNCaP and DU145 prostate tumour cell growth." @default.
• W2135473313 created "2016-06-24" @default.
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• W2135473313 date "1997-09-01" @default.
• W2135473313 modified "2023-10-14" @default.
• W2135473313 title "Growth inhibitory response to activin A and B by human prostate tumour cell lines, LNCaP and DU145" @default.
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• W2135473313 doi "https://doi.org/10.1677/joe.0.1540535" @default.
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• W2135473313 hasPublicationYear "1997" @default.
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