Androgen rather than estrogen up-regulates brain-type cytochrome P450 aromatase (cyp19a1b) gene via tissue-specific promoters in the hermaphrodite teleost ricefield eel Monopterus albus
文献类型： 外文期刊
作者： Zhang, Yang 1 ; Zhang, Shen 1 ; Zhou, Wenliang 1 ; Ye, Xing 3 ; Ge, Wei 4 ; Cheng, Christopher H. K. 5 ; Lin, Haoran 1 ;
作者机构： 1.Sun Yat Sen Univ, Sch Life Sci, Dept Biol, Guangzhou 510275, Guangdong, Peoples R China
2.Sun Yat Sen Univ, Sch Life Sci, Inst Aquat Econ Anim, State Key Lab Biocontrol, Guangzhou 510275, Guangdong, Peoples R China
3.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Guangdong, Peoples R China
4.Chinese Univ Hong Kong, Dept Biol, Shatin, Hong Kong, Peoples R China
5.Chinese Univ Hong Kong, Sch Biomed Sci, Shatin, Hong Kong, Peop
关键词： Monopterus albus;cyp19a1b;Tissue-specific promoter;Estrogen;Androgen
期刊名称：MOLECULAR AND CELLULAR ENDOCRINOLOGY （ 影响因子：4.102； 五年影响因子：4.226 ）
ISSN： 0303-7207
年卷期： 2012 年 350 卷 1 期
页码：
收录情况： SCI
摘要： CYP19A1 in the brain and pituitary of vertebrates is important for reproductive and non-reproductive processes. In teleosts, it is broadly accepted that estradiol (E-2) up-regulates cyp19a1b gene via a positive autoregulatory loop. Our present study, however, showed that E-2 did not up-regulate ricefield eel cyp19a1b in the hypothalamus and pituitary, whereas dihydrotestosterone (DHT) or testosterone (T) stimulated cyp19a1b expression only in the pituitary. Two tissue-specific promoters, namely promoter I and II directing the expression in the brain and pituitary respectively, were identified. Promoter I contained a non-consensus estrogen response element (ERE), and consequently did not respond to E-2. Promoter II contained an androgen response element (ARE) and consequently responded to DHT. Taken together, these results demonstrated a novel steroidal regulation of cyp19a1b gene expression and an alternative usage of tissue-specific cyp19a1b promoters in the brain and pituitary of a teleost species, the ricefield eel. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
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