Low copy number of the salivary amylase gene predisposes to obesity.

Low copy number of the salivary amylase gene predisposes to obesity.
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唾液淀粉酶基因的低拷贝数易于肥胖。

DOI:
10.1038/ng.2939
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发表时间:
2014-05
期刊:
影响因子:
30.8
通讯作者:
Froguel P
Froguel P
中科院分区:
生物学1区
文献类型:
--
作者:
Falchi M;El-Sayed Moustafa JS;Takousis P;Pesce F;Bonnefond A;Andersson-Assarsson JC;Sudmant PH;Dorajoo R;Al-Shafai MN;Bottolo L;Ozdemir E;So HC;Davies RW;Patrice A;Dent R;Mangino M;Hysi PG;Dechaume A;Huyvaert M;Skinner J;Pigeyre M;Caiazzo R;Raverdy V;Vaillant E;Field S;Balkau B;Marre M;Visvikis-Siest S;Weill J;Poulain-Godefroy O;Jacobson P;Sjostrom L;Hammond CJ;Deloukas P;Sham PC;McPherson R;Lee J;Tai ES;Sladek R;Carlsson LM;Walley A;Eichler EE;Pattou F;Spector TD;Froguel P

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常见的多等位基因拷贝数变异体(CNV)与其双等位基因对应物相比,表现出丰富的表型关联。在这里,我们通过脂肪组织中基因表达水平的CNV关联研究,调查了基因剂量效应对肥胖的影响。我们确定了包含唾液淀粉酶基因(AMY 1)的多等位基因CNV与体重指数(BMI)和肥胖的显著相关性,并在6,200名受试者中重复了这一发现。AMY 1拷贝数的增加与淀粉酶基因的表达呈正相关(P= 2.31 × 10−14)和血清酶水平(P< 2.20 × 10−16),而AMY 1拷贝数减少与BMI增加相关(每个估计拷贝的BMI变化= −0.15(0.02)kg/m2; P= 6.93 × 10 - 10)和肥胖风险(每个估计副本的比值比(OR)= 1.19,95%置信区间(CI)= 1.13-1.26;P= 1.46 × 10 - 10)。每拷贝AMY 1的OR值为1.19,这意味着在拷贝数分布的顶部(拷贝数> 9)和底部(拷贝数< 4)10%的受试者之间肥胖风险的差异约为8倍。我们的研究提供了碳水化合物代谢和BMI之间的第一个遗传联系,并证明了超越全基因组关联研究的整合基因组方法的力量。
Common multi-allelic copy number variants (CNVs) appear enriched for phenotypic associations compared to their biallelic counterparts,,,. Here we investigated the influence of gene dosage effects on adiposity through a CNV association study of gene expression levels in adipose tissue. We identified significant association of a multi-allelic CNV encompassing the salivary amylase gene (AMY1) with body mass index (BMI) and obesity, and we replicated this finding in 6,200 subjects. IncreasedAMY1copy number was positively associated with both amylase gene expression (P= 2.31 × 10−14) and serum enzyme levels (P< 2.20 × 10−16), whereas reducedAMY1copy number was associated with increased BMI (change in BMI per estimated copy = −0.15 (0.02) kg/m2;P= 6.93 × 10−10) and obesity risk (odds ratio (OR) per estimated copy = 1.19, 95% confidence interval (CI) = 1.13–1.26;P= 1.46 × 10−10). The OR value of 1.19 per copy ofAMY1translates into about an eightfold difference in risk of obesity between subjects in the top (copy number > 9) and bottom (copy number < 4) 10% of the copy number distribution. Our study provides a first genetic link between carbohydrate metabolism and BMI and demonstrates the power of integrated genomic approaches beyond genome-wide association studies.
DOI: 10.1086/505915
发表时间: 2006-09-01
影响因子: 9.8
作者:
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通讯作者: Stange, Eduard F.
DOI: 10.1126/science.1101160
发表时间: 2005-03-04
期刊: SCIENCE
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发表时间: 1977-01-01
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DOI: 10.1007/978-1-61779-507-7_9
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期刊: GENOMIC STRUCTURAL VARIANTS: METHODS AND PROTOCOLS
影响因子: --
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DOI: 10.1093/bioinformatics/btr264
发表时间: 2011-07-01
期刊: BIOINFORMATICS
影响因子: 5.8
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