Am J Clin Nutr:环境和遗传因素对BMI变化的影响(CODATwins)

2016-07-24 Mechront 译 MedSci原创

背景:众所周知,无论是遗传还是环境因素均会影响个体的BMI;但是这两个因素在儿童期和青春期对BMI的影响是一样的吗?目的:研究者分析了从婴儿期到成年早期,遗传和环境因素对BMI的影响,以及不同性别和地理区域间影响的差异;根据致胖环境,不同地理区域分为高(北美和澳大利亚)、中(欧洲)、低水平(东亚)。方法:研究纳入了来自45个队列的87782对双胞胎从0.5到19.5岁的数据,基于383092个BM

背景:众所周知,无论是遗传还是环境因素均会影响个体的BMI;但是这两个因素在儿童期和青春期对BMI的影响是一样的吗?

目的:研究者分析了从婴儿期到成年早期,遗传和环境因素对BMI的影响,以及不同性别和地理区域间影响的差异;根据致胖环境,不同地理区域分为高(北美和澳大利亚)、中(欧洲)、低水平(东亚)。

方法:研究纳入了来自45个队列的87782对双胞胎从0.5到19.5岁的数据,基于383092个BMI值进行分析,通过遗传结构方程模型将BMI的变化分解为遗传和环境成分。

结果:从5岁开始BMI方差随着年龄的增加而增加,平均BMI也增加。4岁时遗传因素对BMI变化的影响最小(男性:a2 = 0.42;女性:a2 = 0.41);在19岁时,无论男女,遗传因素对BMI变化的影响增加到0.75。在15岁时没有观察到共享环境对双胞胎BMI变化的影响。婴儿期就能看到遗传因素的性别特异性,到13岁或以后,这种影响更加突出。在北美和澳大利亚,BMI变化最大,东亚变化最小;但是遗传变异对总变化的影响比例不存在地区差异。

结论:同对双胞胎共享的环境因素在儿童期影响BMI,但很少有证据表明青春期后期仍会存在影响。我们的研究结果表明,遗传因素在不同种族、不同致胖环境中对青少年BMI的变化起主要作用。

原始出处:

Silventoinen K, Jelenkovic A, et al.Genetic and environmental effects on body mass index from infancy to the onset of adulthood: an individual-based pooled analysis of 45 twin cohorts participating in the COllaborative project of Development of Anthropometrical measures in Twins (CODATwins) study.Am J Clin Nutr. 2016 Jul 13. pii: ajcn130252. [Epub ahead of print]

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    2016-09-20 1e10c84am36(暂无匿称)

    文章很好,非常有益

    0

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    2016-09-13 舒心和人

    环境对机体的影响相当大

    0

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    2016-09-09 ylzr123

    赞一个。深入学习。

    0

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    2016-08-14 忠诚向上

    好好学习一下

    0

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    2016-07-24 1dd8c52fm63(暂无匿称)

    了解一下!

    0

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