期刊
MOLECULAR AND CELLULAR ENDOCRINOLOGY
卷 200, 期 1-2, 页码 89-98出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/S0303-7207(02)00419-7
关键词
gonadotropin-releasing hormone receptor; transcriptional regulation; glucocorticoid response element
资金
- NCRR NIH HHS [RR-00163] Funding Source: Medline
- NICHD NIH HHS [HD-19899, HD-18185] Funding Source: Medline
Expression of the gonadotropin-releasing hormone (GnRH) receptor gene is stimulated by dexamethasone in GnRH-deficient rodents. In this study we identify a 1226 by sequence at the 5'-flanking region of the mouse GnRH-R gene that confers dexamethasone responsiveness when expressed in host cells. Further, a glucocorticoid antagonist blocks transcriptional activity of the mGnRHR promoter. Progressive 5'-deletion of the mGnRHR promoter localized the response sequence between the -331/-255 region. Analysis of this region revealed binding sites for the AP-1 transcription factor. Mutation in AP-1 modified the functional activity of the mGnRHR promoter following GnRH agonist or dexamethasone-stimulation. Using an electrophoretic mobility shift assay, a protein complex is shown to bind to the AP-1 site. These results suggest that AP-1 proteins and glucocorticoid receptor regulate transcription of the GnRH-R promoter in a heterologous system. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.
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