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- W2165646126 abstract "OBJECTIVE: Activin A is a multifunctional growth and cell differentiation factor produced by normal endometrium, and secreted in high amounts by endometrial adenocarcinoma. In the present study we evaluated the expression of two inhibitory activin A ligands, follistatin and follistatin-related gene (FLRG), in endometrial adenocarcinoma and in age-matched healthy human endometrium. DESIGN AND METHODS: Atropic menopausal (n=13) and tumoral (n=9 adenocarcinoma) tissues were processed to evaluate mRNA expression levels (by semiquantitative RT-PCR) and peptide localization (by immunohistochemistry). Differences were evaluated by the unpaired t-test and assumed to be statistically significant when P<0.05. RESULTS: Both control and tumoral endometrial samples express and localize follistatin and FLRG. However, whereas follistatin mRNA expression did not differ significantly, FLRG was significantly lower in endometrial adenocarcinoma than in healthy endometrial specimens (P<0.0001). With respect to the localization of proteins, follistatin was immunolocalized in endometrial epithelial and vascular cells both in tumoral and healthy endometrium without any significant difference in intensity. Nuclear and cytoplasmic FLRG immunolocalization was seen in glands, and only nuclear immunolocalization was found in stroma and vessels of healthy endometrium. FLRG was weakly immunostained in endometrial adenocarcinoma. CONCLUSIONS: Whilst follistatin expression is unchanged, FLRG is down-regulated in endometrial carcinoma. As activin A is a differentiation factor of human endometrium, the present findings support an imbalance between increased activin A and decreased FLRG expression in endometrial cancer, so that the failure of the activin A pathway through FLRG may be pivotal in endometrial tumorigenesis." @default.
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- W2165646126 date "2004-08-01" @default.
- W2165646126 modified "2023-09-27" @default.
- W2165646126 title "Follistatin-related gene expression, but not follistatin expression, is decreased in human endometrial adenocarcinoma" @default.
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- W2165646126 doi "https://doi.org/10.1530/eje.0.1510251" @default.
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