2012年12月3日 讯 /生物谷BIOON/ --近日,来自一项国际研究小组的研究人员通过研究揭示了,四个和低出生体重相关的基因区域,其中三个基因区域影响个体成年后的代谢,而且可以长期影响机体情况,比如成年后体重、患II型糖尿病风险以及成年血压等,相关研究成果刊登在国际杂志Nature Genetics上。
来自埃克塞特大学医学院等处的研究者通过对欧洲、亚洲、非洲等地将近70,000名个体进行综合数据分析,肯定了前期发现的3个遗传区域和低出生体重风险增加相关,这项最新研究中,研究者发现了另外一些遗传区域,其和低出生体重也相关,为HMGA2, LCORL, ADRB1及染色体5号部位。
以前鉴别出的两个基因区域和II型糖尿病风险直接相关,第三个遗传区域,ADRB1和成年后血压相关,这也是科学家第一次发现出生体重和成年后血压有直接的关系。
研究者Freathy说道,这些研究发现为我们研究控制婴儿在母体中成长的分子机制提供了重要的研究线索,这或许可以帮助我们理解在妇女怀孕期间控制婴儿生长的一些情况。
这项最新研究阐述了,早期发育的活性基因对于个体在幼年期以及成年期的健康效应。研究者表示,我们或许可以通过认为地婴儿出生前干预措施来改善婴儿的出生体重,以改善其出生后的生长和健康状况。相关研究由国立卫生研究院等机构提供资助。(生物谷Bioon.com)
doi:10.1038/ng.2477
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New loci associated with birth weight identify genetic links between intrauterine growth and adult height and metabolism
Momoko Horikoshi1, 2, 118 Hanieh Yaghootkar3, 118 Dennis O Mook-Kanamori4, 5, 6, 7, 118 Ulla Sovio8, 9 H Rob Taal4, 5, 6 Branwen J Hennig10, 11 Jonathan P Bradfield12 Beate St Pourcain13 David M Evans13 Pimphen Charoen8, 14 Marika Kaakinen15, 16 Diana L Cousminer17 Terho Lehtimäki18, 19 Eskil Kreiner-Møller20, 21 Nicole M Warrington22 Mariona Bustamante23, 24, 25, 26 Bjarke Feenstra27 Diane J Berry28 Elisabeth Thiering29 et al.
Birth weight within the normal range is associated with a variety of adult-onset diseases, but the mechanisms behind these associations are poorly understood1. Previous genome-wide association studies of birth weight identified a variant in the ADCY5 gene associated both with birth weight and type 2 diabetes and a second variant, near CCNL1, with no obvious link to adult traits2. In an expanded genome-wide association meta-analysis and follow-up study of birth weight (of up to 69,308 individuals of European descent from 43 studies), we have now extended the number of loci associated at genome-wide significance to 7, accounting for a similar proportion of variance as maternal smoking. Five of the loci are known to be associated with other phenotypes: ADCY5 and CDKAL1 with type 2 diabetes, ADRB1 with adult blood pressure and HMGA2 and LCORL with adult height. Our findings highlight genetic links between fetal growth and postnatal growth and metabolism.