人类功能获取MC4R变种显示信号偏差并保护人免于肥胖
Luca A Lotta1, Jacek Mokrosiński2, Edson Mendes de Oliveira2
1University of Cambridge MRC Epidemiology Unit, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK.
Cell
|April 20, 2019
概括
黑色皮质素4受体 (MC4R) 变异通过影响β- 停滞信号影响肥胖. 功能增强的MC4R变体提供了对肥胖和相关疾病的保护,这表明其具有治疗潜力.
科学领域:
- 遗传学
- 药理学
- 代谢疾病
背景情况:
- 黑色皮质素4受体 (MC4R) 在调节能量平衡方面至关重要.
- MC4R信号的破坏是导致肥胖的主要遗传原因.
- 了解MC4R变异的功能是解决肥胖和相关疾病的关键.
研究的目的:
- 在大量人群中发现的61种MC4R变体的功能性特征.
- 研究这些变体与体重指数 (BMI) 和心脏代谢疾病的关联.
- 确定 MC4R 变异对肥胖的潜在信号通路.
主要方法:
- 使用β-逮捕素招募和循环腺单酸盐 (cAMP) 试验对61种MC4R变异的功能性表征.
- 分析英国生物库数据,以将MC4R变异与BMI和心脏代谢疾病的患病率相关联.
- 评估基激活蛋白激酶 (MAPK) 途径的激活.
主要成果:
- 乙- 止素的最大疗效解释了与MC4R变异相关的BMI变异的88%.
- 大多数变体显示功能丧失,但也发现了一些功能增加的变体.
- 功能增强的MC4R变体与较低的BMI,减轻肥胖,2型糖尿病和冠状动脉疾病有关.
结论:
- 乙- 止素招募效率是MC4R变异对BMI影响的关键决定因素.
- 功能增强的MC4R变体,特别是那些偏向于β- 停滞信号的变体,可以防止肥胖和心脏代谢疾病.
- 针对β- 逮捕素偏差的MC4R信号提供了一个有前途的治疗策略来控制体重和治疗与肥胖相关的疾病.
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