alexa Alternative Splicing Of The Androgen Receptor In PCOS With Ovulatory Dysfunction
ISSN: 2161-1017

Endocrinology & Metabolic Syndrome
Open Access

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2nd World Congress on Polycystic Ovarian Syndrome
October 05-07, 2016 Orlando, Florida, USA

Hefeng Huang
Shanghai Jiao Tong University, China
Posters & Accepted Abstracts: Endocrinol Metab Syndr
DOI: 10.4172/2161-1017.C1.015
Abstract
Androgen receptor is essential for healthy developing follicle, while excess intra-ovarian androgens impair follicle growth. Hyperandrogenism is the main characteristic of polycystic ovary syndrome (PCOS), a highly prevalent endocrine disorder and major threat to women’s health. However, the etiology of hyperandrogenism is poorly understood. We describe the specific transcription of two AR splice variants, insertion (ins) and deletion (del) isoforms, in granulosa cells (GCs) of women with PCOS. Wild-type (wt) AR existed in each individual; surprisingly its transcription is comparable between PCOS and control group. Women with AR ins or del isoforms showed distinct hyperandrogenism, attenuated androgen metabolism, enhanced androgen synthesis and altered expression corresponding enzymes, aromatase and steroid 17α-hydroxylase, in GCs, particularly the former. In vitro over-expression of different AR variants in primarily cultured human GCs not only confirmed the in vivo results, but also revealed notable change of expression of folliculogenesis, steroidogenesis and ovarian structure modeling-related genes. Its underlying mechanism is an inferior ability of nuclear shuttle and DNA binding, including U1 androgen response element (ARE) of CYP19A1 gene, of AR as nuclear receptor. In conclusion alternative splicing of AR in GCs is a cause of hyperandrogenism leading to follicular arrest in PCOS.
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