ERα upregulates Phd3 to ameliorate HIF-1 induced fibrosis and inflammation in adipose tissue.

ERα upregulates Phd3 to ameliorate HIF-1 induced fibrosis and inflammation in adipose tissue.
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DOI:
10.1016/j.molmet.2014.05.007
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发表时间:
2014-09
影响因子:
8.1
通讯作者:
Clegg DJ
Clegg DJ
中科院分区:
医学1区
文献类型:
--
作者:
Kim M;Neinast MD;Frank AP;Sun K;Park J;Zehr JA;Vishvanath L;Morselli E;Amelotte M;Palmer BF;Gupta RK;Scherer PE;Clegg DJ

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缺氧诱导因子1 (HIF-1)促进脂肪组织的纤维化和炎症,而雌激素和雌激素受体α (ERα)具有相反的作用。我们在Phd3的启动子中发现了雌激素反应元件(Estrogen Response Element, ERE),这是HIF-1的负调控酶,我们证明HIF-1α在17-β雌二醇(E2)/ERα介导的Phd3转录后泛素化。在体内操纵ERα可增加Phd3转录并降低HIF-1活性,而添加Phd3可改善脂肪组织纤维化和炎症。我们的研究结果概述了脂肪组织中E2/ERα、PHD3和HIF-1之间的一种新的调节关系,为E2/ERα在脂肪组织中的保护作用提供了机制解释。
Hypoxia Inducible Factor 1 (HIF-1) promotes fibrosis and inflammation in adipose tissues, while estrogens and Estrogen Receptor α (ERα) have the opposite effect. Here we identify an Estrogen Response Element (ERE) in the promoter of Phd3, which is a negative regulatory enzyme of HIF-1, and we demonstrate HIF-1α is ubiquitinated following 17-β estradiol (E2)/ERα mediated Phd3 transcription. Manipulating ERα in vivo increases Phd3 transcription and reduces HIF-1 activity, while addition of PHD3 ameliorates adipose tissue fibrosis and inflammation. Our findings outline a novel regulatory relationship between E2/ERα, PHD3 and HIF-1 in adipose tissues, providing a mechanistic explanation for the protective effect of E2/ERα in adipose tissue.
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