JACC:早年开始持续低水平LDL-C暴露对于冠心病风险作用:孟德尔随机分析

2013-12-17 MedSci MedSci原创

这一研究的目的是评估长期维持较低的血浆低密度脂蛋白(LDL-C)水平对冠心病(CHD)风险的影响。文章发表在JACC上。我们知道,LDL-C与CHD风险相关。然而,对于从早年开始的长期暴露于较低水平LDL-C同CHD风险的相关性尚未进行明确的定量分析。方法:CHD可由6种不同基因、共9种基因型所介导,我们对长期暴露于较低水平LDL-C对于上述CHD风险的影响进行了一系列meta分析。然后将这些孟德

这一研究的目的是评估长期维持较低的血浆低密度脂蛋白(LDL-C)水平对冠心病(CHD)风险的影响。文章发表在JACC上。

我们知道,LDL-C与CHD风险相关。然而,对于从早年开始的长期暴露于较低水平LDL-C同CHD风险的相关性尚未进行明确的定量分析。方法:CHD可由6种不同基因、共9种基因型所介导,我们对长期暴露于较低水平LDL-C对于上述CHD风险的影响进行了一系列meta分析。然后将这些孟德尔的随机化研究同meta分析结合起来以获得对LDL-C长期较低水平暴露所产生影响的更精确评估,并将其与临床上应用他汀类药物治疗时LDL-C相同量降低的获益相对比。

结果:LDL-C每降低一个单位都会有高度一致的CHD风险降低,所有这九种基因型都与之相关并且无明显异质性效应(I2=0.0%)。在对312,321名参与者的不重叠资料进行meta分析显示,自然的随机分配到长期低水平LDL-C暴露者显示LDL-C水平每降低1mmol/l(38.7 mg/dl),则CHD风险就会降低54.5%(95%可信区间:48.8%-59.5%)。这意味着从早年开始长期维持的LDL-C水平每降低一个单
位,CHD的风险降低量是生命晚期开始服用他汀类药物达到同样指标的三倍(p =8.43×10-19)。

结论:从早年开始持续暴露于较低水平LDL-C对于降低CHD风险的效果远大于目前在晚年才开始的降LDL-C疗法。

原始出处:
Ference BA, Yoo W, Alesh I, Mahajan N, Mirowska KK, Mewada A, Kahn J, Afonso L, Williams KA Sr, Flack JM.Effect of long-term exposure to lower low-density lipoprotein cholesterol beginning early in life on the risk of coronary heart disease: a Mendelian randomization analysis.J Am Coll Cardiol. 2012 Dec 25;60(25):2631-9.

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    2014-09-27 hbwxf
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    2013-12-19 zhwj