Nuclear receptor LRH-1 induces the reproductive neuropeptide kisspeptin in the hypothalamus.

Nuclear receptor LRH-1 induces the reproductive neuropeptide kisspeptin in the hypothalamus.
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DOI:
10.1210/me.2012-1371
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发表时间:
2013-04
期刊:
Molecular endocrinology (Baltimore, Md.)
影响因子:
--
通讯作者:
Mangelsdorf DJ
Mangelsdorf DJ
中科院分区:
其他
文献类型:
--
作者:
Atkin SD;Owen BM;Bookout AL;Cravo RM;Lee C;Elias CF;Elmquist JK;Kliewer SA;Mangelsdorf DJ

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神经肽kisspeptin的差异表达和分泌的神经元在弓状(弧)和前腹侧脑室周围(AVPV)核的下丘脑协调的时间释放垂体促性腺激素,控制女性生殖周期。然而,这种差异调节的分子基础还不完全清楚。在这里,我们报告了肝受体同源物-1(LRH-1),核受体超家族的成员,在雌性小鼠的Arc中的kisspeptin神经元中表达,但在AVPV中不表达。LRH-1直接与Kissspeptin(Kiss 1)启动子结合并刺激Kiss 1转录。小鼠kisspeptin神经元中LRH-1的缺失降低了Arc中Kiss 1的表达,导致血浆FSH水平降低,卵泡成熟失调和发情周期延长。相反,在kisspeptin神经元中LRH-1的过表达增加了Arc Kiss 1的表达和血浆FSH浓度。这些研究为Arc和AVPV神经元基础kisspeptin表达的差异调节提供了分子基础,并揭示了下丘脑LRH-1在调节雌性生殖轴中的重要作用。
The differential expression and secretion of the neuropeptide kisspeptin from neurons in the arcuate (Arc) and anteroventral periventricular (AVPV) nuclei of the hypothalamus coordinate the temporal release of pituitary gonadotropins that control the female reproductive cycle. However, the molecular basis for this differential regulation is incompletely understood. Here, we report that liver receptor homolog-1 (LRH-1), a member of the nuclear receptor superfamily, is expressed in kisspeptin neurons in the Arc but not in the AVPV in female mice. LRH-1 binds directly to the kisspeptin (Kiss1) promoter and stimulates Kiss1 transcription. Deletion of LRH-1 from kisspeptin neurons in mice decreased Kiss1 expression in the Arc, leading to reduced plasma FSH levels, dysregulated follicle maturation, and prolongation of the estrous cycle. Conversely, overexpression of LRH-1 in kisspeptin neurons increased Arc Kiss1 expression and plasma FSH concentrations. These studies provide a molecular basis for the differential regulation of basal kisspeptin expression in Arc and AVPV neurons and reveal a prominent role for LRH-1 in hypothalamus in regulating the female reproductive axis.
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