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http://repositorio.inger.gob.mx/jspui/handle/20.500.12100/17330| Título : | Estradiol differentially induces progesterone receptor isoforms expression through alternative promoter regulation in a mouse embryonic hypothalamic cell line |
| Autor: | EDGAR RICARDO VAZQUEZ MARTINEZ Ignacio Camacho Arroyo ANGEL ALFONSO ZARAIN HERZBERG MARIA DEL CARMEN RODRIGUEZ GUTIERREZ LUCIANO MENDOZA GARCES patricia ostrosky-wegman MARCO ANTONIO CERBON CERVANTES |
| Palabras clave : | BIOLOGÍA Y QUÍMICA;Biología molecular;Isoformas del receptor de progesterona;Progesterone receptor isoforms;Marcas epigenéticas;Epigenetic marks;Hipotálamo;Hypothalamus;Acetilación de histonas;Histone acetylation;Estradiol |
| Fecha de publicación: | 2016 |
| Editorial : | Springer |
| Descripción : | Progesterone receptor (PR) presents two main isoforms (PR-A and PR-B) that are regulated by two specific promoters and transcribed from alternative transcriptional start sites. The molecular regulation of PR isoforms expression in embryonic hypothalamus is poorly understood. The aim of the present study was to assess estradiol regulation of PR isoforms in a mouse embryonic hypothalamic cell line (mHypoE-N42), as well as the transcriptional status of their promoters. MHypoE-N42 cells were treated with estradiol for 6 and 12 h. Then, Western blot, real-time quantitative reverse transcription polymerase chain reaction, and chromatin and DNA immunoprecipitation experiments were performed. PR-B expression was transiently induced by estradiol after 6 h of treatment in an estrogen receptor alpha (ERα)-dependent manner. This induction was associated with an increase in ERα phosphorylation (serine 118) and its recruitment to PR-B promoter. After 12 h of estradiol exposure, a downregulation of this PR isoform was associated with a decrease of specific protein 1, histone 3 lysine 4 trimethylation, and RNA polymerase II occupancy on PR-B promoter, without changes in DNA methylation and hydroxymethylation. In contrast, there were no estradiol-dependent changes in PR-A expression that could be related with the epigenetic marks or the transcription factors evaluated. We demonstrate that PR isoforms are differentially regulated by estradiol and that the induction of PR-B expression is associated to specific transcription factors interactions and epigenetic changes in its promoter in embryonic hypothalamic cells. |
| URI : | http://repositorio.inger.gob.mx/jspui/handle/20.500.12100/17330 |
| Aparece en las colecciones: | 1. Artículos |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| Endocrine (1559-0100) Vol. 52 (2016).pdf | 880.36 kB | Adobe PDF | Visualizar/Abrir |