Genomics of sex hormone receptor signaling in hepatic sexual dimorphism.

Genomics of sex hormone receptor signaling in hepatic sexual dimorphism.
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DOI:
10.1016/j.mce.2017.05.025
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发表时间:
2018-08-15
影响因子:
4.1
通讯作者:
Li Z
Li Z
中科院分区:
医学2区
文献类型:
--
作者:
Zheng D;Wang X;Antonson P;Gustafsson JÅ;Li Z

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肝脏在各种生理过程中起着至关重要的作用。性二态性在肝脏疾病如脂肪肝和肝癌中有明显的定义,但在正常肝脏中几乎没有涉及。雄性和雌性肝脏之间不同的性激素信号传导是肝脏性二型的主要驱动因素。超过6,000个基因在雄性和雌性小鼠的肝脏中有不同的表达。在这里,我们解决如何性激素受体,雌激素受体α(ERα)和雄激素受体(AR),介导小鼠肝脏中的性二型基因表达。我们使用ChIP-Seq鉴定了5,192个ERα靶基因和4,154个AR靶基因。使用肝脏特异性ERα或AR敲除小鼠,我们进一步鉴定了ERα(123个基因)和AR(151个基因)的直接和功能性靶基因,这些基因导致肝脏性二型。我们还发现,最显着的性二态基因表达开始在出生时比较肝脏发育过程中的胚胎阶段E10.5到出生后阶段P60的肝脏基因表达数据。总的来说,我们的研究表明,性激素受体信号驱动整个肝脏发育过程中肝脏基因表达的性别二型性。
The liver plays a crucial role in a variety of physiological processes. Sexual dimorphism is markedly defined in liver disorders, such as fatty liver diseases and liver cancer, but barely addressed in the normal liver. Distinct sex hormone signaling between male and female livers is the major driving factor for hepatic sexual dimorphism. Over 6,000 genes are differently expressed between male and female livers in mice. Here we address how sex hormone receptors, estrogen receptor alpha (ERα) and androgen receptor (AR), mediate sexually dimorphic gene expression in mouse livers. We identified 5,192 ERα target genes and 4,154 AR target genes using ChIP-Seq. Using liver-specific ERα or AR knockout mice, we further identified direct and functional target genes of ERα (123 genes) and AR (151 genes) that contribute to hepatic sexual dimorphism. We also found that the most significant sexually dimorphic gene expression was initiated at birth by comparing hepatic gene expression data from the embryonic stage E10.5 to the postnatal stage P60 during liver development. Overall, our study indicates that sex hormone receptor signaling drives sexual dimorphism of hepatic gene expression throughout liver development.
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