Rare MTNR1B variants impairing melatonin receptor 1B function contribute to type 2 diabetes.

Rare MTNR1B variants impairing melatonin receptor 1B function contribute to type 2 diabetes.
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DOI:
10.1038/ng.1053
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发表时间:
2012-01-29
期刊:
影响因子:
30.8
通讯作者:
Froguel, Philippe
Froguel, Philippe
中科院分区:
生物学1区
文献类型:
--
作者:
Bonnefond, Amelie;Clement, Nathalie;Fawcett, Katherine;Yengo, Loic;Vaillant, Emmanuel;Guillaume, Jean-Luc;Dechaume, Aurelie;Payne, Felicity;Roussel, Ronan;Czernichow, Sebastien;Hercberg, Serge;Hadjadj, Samy;Balkau, Beverley;Marre, Michel;Lantieri, Olivier;Langenberg, Claudia;Bouatia-Naji, Nabila;Charpentier, Guillaume;Vaxillaire, Martine;Rocheleau, Ghislain;Wareham, Nicholas J.;Sladek, Robert;McCarthy, Mark I.;Dina, Christian;Barroso, Ines;Jockers, Ralf;Froguel, Philippe

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全基因组关联研究表明,MTNR 1B(编码褪黑激素受体1B,也称为MT 2)中常见的非编码变体会增加2型糖尿病(T2 D)的风险。虽然最强的相关信号非常显著(P<10−20),但其对T2 D风险的贡献是适度的(比值比,OR~1.10-1.15)。我们对7,632名欧洲人(包括2,186名T2 D患者)进行了大规模外显子重测序,并确定了40种非同义变异,包括36种与T2 D相关的非常罕见的变异(次要等位基因频率,MAF<0.1%)(OR=3.31[1.78;6.18]95%); P=1.64×10−4。对所有40个突变体的四级功能研究显示,14个是无功能的和罕见的(MAF<1%); 4个是非常罕见的,完全丧失褪黑激素结合和信号传导能力。在非常罕见的变异中,部分或全部功能丧失变异(而非中性变异)导致T2 D(OR=5.67[2.17;14.82]95%; P=4.09×10−4)。对另外11,854名个体的4种完全功能丧失变异进行基因分型,发现它们与T2 D风险相关(Ncases= 8,153/Ncontrols= 10,100; OR=3.88[1.49;10.07]95%; P=5.37×10−3)。这项研究建立了MTNR 1B和T2 D风险之间的可靠功能联系。
Genome-wide association studies revealed that common non-coding variants in MTNR1B (encoding melatonin receptor 1B, also known as MT2) increase type 2 diabetes (T2D) risk. Although the strongest association signal was highly significant (P<10−20), its contribution to T2D risk was modest (odds ratio, OR~1.10-1.15). We performed large-scale exon resequencing in 7,632 Europeans including 2,186 T2D patients and identified 40 non-synonymous variants, including 36 very rare variants (minor allele frequency, MAF<0.1%) associated with T2D (OR=3.31[1.78;6.18]95%); P=1.64×10−4. A four-tier functional investigation of all 40 mutants revealed that 14 were non-functional and rare (MAF<1%); four were very rare with complete loss of melatonin binding and signaling capabilities. Among the very rare variants, the partial or total loss-of-function variants, but not the neutral ones, contributed to T2D (OR=5.67[2.17;14.82]95%; P=4.09×10−4). Genotyping the four complete loss-of-function variants in 11,854 additional individuals revealed their association with T2D risk (Ncases=8,153/Ncontrols=10,100; OR=3.88[1.49;10.07]95%; P=5.37×10−3). This study establishes a firm functional link between MTNR1B and T2D risk.
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发表时间: 2010-12-03
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发表时间: 2009-01
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