内皮特异性普罗利氧化酶域含有蛋白2的缺陷减轻了与衰老相关的肥胖和运动不耐受
Lihong Pan1, Xiaochen He1, Rui Xu1
1Department of Physiology and Biophysics, University of Mississippi Medical Center, School of Medicine, 2500 North State Street, Jackson, MS, 39216, USA.
GeroScience
|March 11, 2024
概括
向血管内皮基酶域含有蛋白2 (PHD2) 的蛋白质显著降低了与衰老相关的肥胖症,并改善了运动能力. 这项研究表明,内皮细胞中PHD2抑制为与年龄相关的代谢衰退提供了有前途的治疗策略.
科学领域:
- 老龄化和新陈代谢
- 血管生物学 血管生物学
- 酶的功能 酶的功能
背景情况:
- 肥胖和不耐运动会降低老年人的生活质量.
- 含有prolyl氧酶域的蛋白2 (PHD2) 调节缺氧诱导因子-α (HIF).
- 内皮PHD2在与衰老相关的代谢功能障碍中的作用尚不清楚.
研究的目的:
- 调查内皮PHD2在与衰老相关的肥胖和运动能力中的功能.
- 为了确定抑制内皮PHD2是否可以改善与年龄相关的代谢衰退.
主要方法:
- 通过交叉PHD2-floxed和VE-Cadherin (Cdh5) -Cre小鼠,生成血管内皮细胞特异的PHD2基因淘汰 (PHD2 ECKO) 的小鼠.
- 在年轻 (6-7个月) 和老年 (16-18个月) PHD2 ECKO和对照小鼠中评估肥胖和运动能力.
- 测量身体成分,食物摄入量,氧气消耗量 (VO2max),葡萄糖耐受性和胰岛素耐药性.
主要成果:
- 与对照组相比,老年PHD2 ECKO小鼠表现出瘦身的表型,脂肪质量减少,尽管食物摄入量相似.
- PHD2 ECKO小鼠的休息和运动氧气消耗增加,包括更高的VO2max.
- 年轻和年长的PHD2 ECKO小鼠均表现出改善的葡萄糖耐受性和降低的胰岛素耐药性.
结论:
- 抑制血管内皮PHD2信号传递有效打击与衰老相关的肥胖症.
- 内皮PHD2在调节衰老期间的运动不耐受和葡萄糖代谢方面发挥着关键作用.
- 向内皮PHD2是与年龄相关的代谢疾病的潜在治疗方法.
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