Complete mtDNA genomes reveal similar penetrances of maternally inherited type 2 diabetes in two Chinese families

Complete mtDNA genomes reveal similar penetrances of maternally inherited type 2 diabetes in two Chinese families
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完整的线粒体DNA基因组揭示两个中国家庭母系遗传2型糖尿病的外显率相似

DOI:
10.3109/19401736.2014.982552
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发表时间:
2014-12
期刊:
影响因子:
--
通讯作者:
Zhang, Yaping
Zhang, Yaping
中科院分区:
生物4区
文献类型:
--
作者:
Li, Yiping;Wang, Huawei;Irwin, David M.;Zhang, Yaping

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摘要以往的研究表明,来自母体基因组的线粒体DNA(mtDNA)与2型糖尿病密切相关。这将支持2型糖尿病的家族模式。因此,我们分析了来自中国西南地区的两个家族,A和B,证明母系遗传的2型糖尿病的完整mtDNA基因组。我们的数据支持来自A和B家系的mtDNA谱系分别属于单倍群A4和D4 h1。这表明,具有相似遗传特征的母系遗传2型糖尿病可能出现在具有显著不同母系遗传背景的中国个体中。在家族B中鉴定出两个私有编码区突变(MT-ND 5中的G13759 A和tRNA-Thr中的G15930 A)。进一步的进化和系统发育分析表明,这两个突变有多个起源,不太可能是致病的。
Abstract Previous work suggests that mitochondrial DNA (mtDNA) derived from the maternal genome has a close affinity with type 2 diabetes. This would support a familial pattern for type 2 diabetes. Thereby, we analyzed complete mtDNA genomes from two families, A and B, from Southwest China that demonstrated maternally inherited type 2 diabetes. Our data support that mtDNA lineages from families A and B belong to haplogroups A4 and D4h1, respectively. This suggests that maternally inherited type 2 diabetes with similar penetrances can arise in Chinese individuals with strikingly different maternal genetic backgrounds. Two private coding region mutations (G13759A in MT-ND5 and G15930A in tRNA-Thr) were identified in family B. Further evolutionary and phylogenetic analyses suggest that both these mutations have multiple origins and are unlikely to be disease causing.
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