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Circ Res:肥胖会增加缺血性心脏病风险,你知道多少?

2014-12-08 MedSci MedSci原创

有研究显示,肥胖与缺血性心脏病存在一定的联系,两者之间可能是因果关系;然而,相比于体重本身而言,更可能是脂蛋白、血压、血糖水平、和/或炎症这些变量对缺血性心脏病风险起着调节作用。肥胖作为一个日益增长的公共健康问题影响着众多国家,虽然高体重指数是一项可以被控制的危险因素,却很难鼓励肥胖患者减肥,更别说保持体重减轻了。因此,对哪些因素会导致肥胖增加缺血性心脏病风险的研究至关重要。 Anette Va

有研究显示,肥胖与缺血性心脏病存在一定的联系,两者之间可能是因果关系;然而,相比于体重本身而言,更可能是脂蛋白、血压、血糖水平、和/或炎症这些变量对缺血性心脏病风险起着调节作用。肥胖作为一个日益增长的公共健康问题影响着众多国家,虽然高体重指数是一项可以被控制的危险因素,却很难鼓励肥胖患者减肥,更别说保持体重减轻了。因此,对哪些因素会导致肥胖增加缺血性心脏病风险的研究至关重要。

Anette Varbo等人通过孟德尔分析对肥胖和缺血性心脏病之间的联系做了研究,发现主要是残留胆固醇、低密度脂蛋白胆固醇、血压这三项中间变量对缺血性心脏病的风险起着调节作用,该研究结果近期发表在11月的Circulation research上。

理论基础:肥胖会增加缺血性心脏病的风险,中间变量(主要是残留胆固醇、低密度脂蛋白胆固醇、血压)对其风险起着调节作用,而不是升高的体重本身对风险起着调节。

目的:检验肥胖增加缺血性心脏病风险,其作用受到脂蛋白、血压、血糖、和/或C反应蛋白调节的假说。

方法和结果:在哥本哈根,通过孟德尔随机化方法纳入9万名参与者用于数据分析。对体重指数和中间变量进行常规测量,用来验证肥胖与缺血性心脏病风险之间的联系。在为期22年的随访中,13945名参与者缺血性心脏病有进展。结果显示:非空腹残留胆固醇和低密度脂蛋白胆固醇水平的增高,血压的增高以及非空腹血糖水平的升高都会导致肥胖患者增加缺血性心脏病风险;而高密度脂蛋白的减少以及C反应蛋白水平的增高并不增加缺血性心脏病的风险。在肥胖患者中,三项中间变量增加缺血性心脏病风险:低密度脂蛋白超额危险度为8%,收缩压为7%,残留胆固醇为7%。通过体重指数观察到的超额危险度分别为为21%,11%和20%。

结论:非空腹残留胆固醇,低密度脂蛋白胆固醇以及血压的增高都能介导肥胖患者增加缺血性心脏病的风险。结论提示,未能减轻体重的肥胖患者,可以通过降低上述危险因素的水平获取收益。

原始出处

Varbo A, Benn M, Davey Smith G, Timpson NJ, Tybjaerg-Hansen A, Nordestgaard BG. Remnant Cholesterol, Low-Density Lipoprotein Cholesterol, and Blood Pressure as Mediators from Obesity to Ischemic Heart Disease. Circ Res. 2014.December 2

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