G protein-coupled estrogen receptor protects from atherosclerosis.

G protein-coupled estrogen receptor protects from atherosclerosis.
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DOI:
10.1038/srep07564
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发表时间:
2014-12-23
期刊:
影响因子:
4.6
通讯作者:
Prossnitz ER
Prossnitz ER
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Meyer MR;Fredette NC;Howard TA;Hu C;Ramesh C;Daniel C;Amann K;Arterburn JB;Barton M;Prossnitz ER

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绝经后妇女的冠状动脉粥样硬化和心肌梗死与炎症和一氧化氮(NO)形成减少有关。天然雌激素对这两个过程都有保护作用,但也显示出子宫营养活性。在这里,我们使用遗传学和药理学的方法来研究G蛋白偶联雌激素受体(GPER)在动脉粥样硬化中的作用。在卵巢完整的小鼠中,gper的缺失增加了动脉粥样硬化的进展,总胆固醇和LDL胆固醇水平和炎症,同时降低了血管NO生物活性,在某些情况下,手术绝经加重了这种影响。在人内皮细胞中,GPER在细胞内膜上表达并介导eNOS活化和NO形成,部分解释了雌激素介导的效应。长期使用G-1(一种合成的、高选择性的GPER小分子激动剂)治疗可减少绝经后动脉粥样硬化和炎症,而无子宫营养作用。总之,这项研究揭示了GPER的动脉粥样硬化保护功能,并介绍了选择性GPER激活作为一种新的治疗方法,以抑制绝经后动脉粥样硬化和炎症的子宫营养活性的情况下。
Coronary atherosclerosis and myocardial infarction in postmenopausal women have been linked to inflammation and reduced nitric oxide (NO) formation. Natural estrogen exerts protective effects on both processes, yet also displays uterotrophic activity. Here, we used genetic and pharmacologic approaches to investigate the role of the G protein-coupled estrogen receptor (GPER) in atherosclerosis. In ovary-intact mice, deletion of gper increased atherosclerosis progression, total and LDL cholesterol levels and inflammation while reducing vascular NO bioactivity, effects that were in some cases aggravated by surgical menopause. In human endothelial cells, GPER was expressed on intracellular membranes and mediated eNOS activation and NO formation, partially accounting for estrogen-mediated effects. Chronic treatment with G-1, a synthetic, highly selective small molecule agonist of GPER, reduced postmenopausal atherosclerosis and inflammation without uterotrophic effects. In summary, this study reveals an atheroprotective function of GPER and introduces selective GPER activation as a novel therapeutic approach to inhibit postmenopausal atherosclerosis and inflammation in the absence of uterotrophic activity.
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