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- W3092229309 abstract "Recently, we have demonstrated that neonatal exposure to environmental endocrine-active compounds (EACs) with androgenic/antiandrogenic and estrogenic/antiestrogenic activities led to morphological and functional changes in the porcine corpus luteum (CL). To gain insight into the regulatory mechanisms of the long-term effects of EACs, we analyzed the impact of neonatal exposure of such compounds on global DNA methylation and the expression of miRNA biogenesis components in the porcine CL. Piglets were injected subcutaneously with testosterone propionate (TP, an androgen), flutamide (FLU, an antiandrogen), 4-tert-octylphenol (OP, an estrogenic compound), ICI 182,780 (ICI, an antiestrogen), methoxychlor (MXC, a compound with mixed activities) or corn oil (control) between postnatal days 1 and 10 (n = 5/group). The CLs from sexually mature gilts were examined for global DNA methylation and for the abundance of proteins related to DNA methylation (DNMT1, DNMT3A and DNMT3B) and miRNA biogenesis (DROSHA, XPO5, DICER1, AGO2) using an enzyme-linked immunosorbent assay, Western blotting and immunohistochemical staining. ICI and MXC increased the global DNA methylation levels and DNMT1 protein abundance in the luteal tissue. OP treatment led to a lower DROSHA protein abundance, while ICI treatment resulted in a greater DROSHA protein abundance. Both FLU and ICI increased DICER1 protein abundance in the luteal tissue. In addition, XPO5 showed immunolocalization exclusively in small luteal cells in the OP-treated pigs, in contrast to localization in both small and large luteal cells in the controls. In conclusion, the changes in DNA methylation, as well as the altered miRNA biogenesis components, seem to be a part of the regulatory network that mediates the long-term effects of EACs on CL function in pigs." @default.
- W3092229309 created "2020-10-15" @default.
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- W3092229309 date "2021-01-01" @default.
- W3092229309 modified "2023-10-18" @default.
- W3092229309 title "Effect of neonatal exposure to endocrine-active compounds on epigenetic regulation of gene expression in corpus luteum of gilts" @default.
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- W3092229309 doi "https://doi.org/10.1016/j.theriogenology.2020.10.010" @default.
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