{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T07:11:24Z","timestamp":1782976284719,"version":"3.54.5"},"reference-count":47,"publisher":"The Endocrine Society","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2005,1,1]]},"abstract":"<jats:p>Ovarian granulosa cells play pivotal roles in many aspects of ovary functions including folliculogenesis and steroidogenesis. In response to FSH and LH, the elevation of intracellular cAMP level in granulosa cells leads to activation of multiple ovarian genes. Here, we report findings from a genome-wide study of the cAMP-responsive gene expression profiles in a human granulosa-like tumor cell line, KGN. The study identified 140 genes that are either activated or repressed by 2-fold or greater after stimulation by the adenylyl cyclase activator forskolin. The induction patterns of some cAMP-responsive genes were further analyzed by quantitative real-time PCR. Consistent with previous observations, the LH-responsive genes, such as the nuclear receptor 4A subfamily (NURR1, NGFI-B, and NOR-1), were rapidly but transiently induced, whereas the FSH-responsive gene CYP19 encoding aromatase was induced in a delayed fashion. Interestingly, ectopic expression of NURR1 or NGFI-B severely attenuated the cAMP-responsive activation of the ovary-specific aromatase promoter. Reduction of the endogenous NURR1 or NGFI-B by small interfering RNA significantly elevated aromatase gene expression. The cis-elements responsible for NURR1\/NGFI-B-mediated repression were mapped to the minimal aromatase promoter sequence that confers camp responsiveness. Furthermore, the DNA-binding domain of NURR1 was required for the repression. Taken together, these results strongly suggest a causal relationship between the rapid decline of aromatase mRNA and induction of nuclear receptor subfamily 4A expression, which concomitantly occur upon LH surge at the later stages of ovarian follicular development.<\/jats:p>","DOI":"10.1210\/en.2004-0889","type":"journal-article","created":{"date-parts":[[2004,10,15]],"date-time":"2004-10-15T00:27:42Z","timestamp":1097800062000},"page":"237-246","source":"Crossref","is-referenced-by-count":45,"title":["The Orphan Nuclear Receptors NURR1 and NGFI-B Modulate Aromatase Gene Expression in Ovarian Granulosa Cells: A Possible Mechanism for Repression of Aromatase Expression upon Luteinizing Hormone Surge"],"prefix":"10.1210","volume":"146","author":[{"given":"Yimin","family":"Wu","sequence":"first","affiliation":[{"name":"Department of Biochemistry and Molecular Genetics (Y.W., S.G., Y.H.), School of Medicine, University of Virginia, Charlottesville, Virginia 22908-0733"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sagar","family":"Ghosh","sequence":"first","affiliation":[{"name":"Department of Biochemistry and Molecular Genetics (Y.W., S.G., Y.H.), School of Medicine, University of Virginia, Charlottesville, Virginia 22908-0733"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshihiro","family":"Nishi","sequence":"first","affiliation":[{"name":"Department of Medicine and Bioregulatory Science (Y.N., T.Y., H.N.), Graduate School of Medical Sciences, Kyushu University, Higashi-Ku, Fukuoka 812-8582, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toshihiko","family":"Yanase","sequence":"first","affiliation":[{"name":"Department of Medicine and Bioregulatory Science (Y.N., T.Y., H.N.), Graduate School of Medical Sciences, Kyushu University, Higashi-Ku, Fukuoka 812-8582, 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