Association of the type 2 diabetes mellitus susceptibility gene, TCF7L2, with schizophrenia in an Arab-Israeli family sample.

Association of the type 2 diabetes mellitus susceptibility gene, TCF7L2, with schizophrenia in an Arab-Israeli family sample.
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DOI:
10.1371/journal.pone.0029228
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Lerer B
Lerer B
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Alkelai A;Greenbaum L;Lupoli S;Kohn Y;Sarner-Kanyas K;Ben-Asher E;Lancet D;Macciardi F;Lerer B

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许多不同人群的报告都证明了 10q24-q26 区域与精神分裂症的联系,因此鼓励进一步分析该位点以检测特定的精神分裂症基因。我们的小组之前报道了在一个独特的、同质的阿拉伯-以色列家庭样本中,在显性遗传模式下,10q24-q26区域与精神分裂症的联系,该样本中有多个受精神分裂症影响的个体。为了进一步探索该候选区域并识别其中的特定易感性变异,我们对取自我们之前的全基因组关联研究 (GWAS) 的 10q24-26 基因型数据进行了重新分析(Alkelai 等人,2011)。我们在显性遗传模型下分析了 57 个阿拉伯以色列家庭(189 个基因型个体)的扩展样本中的 2089 个 SNP,根据之前进行的 MOD 评分分析,该模型最适合该基因座。我们发现 TCF7L2 基因内含子 SNP rs12573128 (p = 7.01×10−6) 和位于 TCF7L2 和 HABP2 之间的邻近基因间 SNP rs1033772 (p = 6.59×10−6) 与精神分裂症显着相关。 TCF7L2 是不同种族中最明确的 2 型糖尿病 (T2D) 易感基因之一,在胰腺 β 细胞功能中发挥作用,并可能导致精神分裂症和 T2D 的共病。这些初步结果独立支持了先前关于 TCF7L2 在精神分裂症易感性中可能发挥作用的发现,并加强了在感兴趣区域进行关联分析时整合遗传连锁分析模型的重要性。需要在其他人群中进行进一步的验证研究。
Many reports in different populations have demonstrated linkage of the 10q24–q26 region to schizophrenia, thus encouraging further analysis of this locus for detection of specific schizophrenia genes. Our group previously reported linkage of the 10q24–q26 region to schizophrenia in a unique, homogeneous sample of Arab-Israeli families with multiple schizophrenia-affected individuals, under a dominant model of inheritance. To further explore this candidate region and identify specific susceptibility variants within it, we performed re-analysis of the 10q24-26 genotype data, taken from our previous genome-wide association study (GWAS) (Alkelai et al, 2011). We analyzed 2089 SNPs in an extended sample of 57 Arab Israeli families (189 genotyped individuals), under the dominant model of inheritance, which best fits this locus according to previously performed MOD score analysis. We found significant association with schizophrenia of the TCF7L2 gene intronic SNP, rs12573128, (p = 7.01×10−6) and of the nearby intergenic SNP, rs1033772, (p = 6.59×10−6) which is positioned between TCF7L2 and HABP2. TCF7L2 is one of the best confirmed susceptibility genes for type 2 diabetes (T2D) among different ethnic groups, has a role in pancreatic beta cell function and may contribute to the comorbidity of schizophrenia and T2D. These preliminary results independently support previous findings regarding a possible role of TCF7L2 in susceptibility to schizophrenia, and strengthen the importance of integrating linkage analysis models of inheritance while performing association analyses in regions of interest. Further validation studies in additional populations are required.
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