The association between common genetic variation in the FTO gene and metabolic syndrome in Han Chinese

• Published in: Chinese medical journal Vol. 123; no. 14; pp. 1852 - 1858
• Main Authors: Wang, Tong, Huang, Yi, Xiao, Xin-Hua, Wang, Duen-Mei, Diao, Cheng-Ming, Zhang, Feng, Xu, Ling-Ling, Zhang, Yong-Biao, Li, Wen-Hui, Zhang, Li-Li, Zhang, Yun, Sun, Xiao-Fang, Zhang, Qian
• Format: Journal Article
• Language: English
• Published: China Graduate University of Chinese Academy of Sciences, Beijing 100029, China%Key Laboratory of Endocrinology, Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital,Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China%Beijing Institute of Genomics, Chinese Academy of Sciences,Beijing 100029, China 01.07.2010; Department of Endocrinology, the 305 Hospital Chinese People's Liberation Army, Beijing 100017, China%Beijing Institute of Genomics, Chinese Academy of Sciences,Beijing 100029, China; Key Laboratory of Endocrinology, Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital,Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
• Subjects: 2型糖尿病; Alpha-Ketoglutarate-Dependent Dioxygenase FTO; Asian Continental Ancestry Group; Female; FTO; Genetic Predisposition to Disease - genetics; Genetic Variation - genetics; Genotype; Haplotypes - genetics; Humans; Male; Metabolic Syndrome - genetics; Middle Aged; Polymorphism, Single Nucleotide - genetics; Proteins - genetics; 代谢特征; 关联; 单核苷酸多态性; 基因座; 症候群; 遗传变异; metabolic syndrome; Chinese; single nucleotide polymorphisms; fat mass and obesity associated gene
• ISSN: 0366-6999; 2542-5641; 2542-5641
• DOI: 10.3760/cma.j.issn.0366-6999.2010.14.005

Background Genome-wide association studies for type 2 diabetes mellitus （T2DM） identified FTO gene as a locus conferring increased risk for common obesity in many populations with European ancestry. However, the involvement of FTO gene in obesity or T2DM related metabolic traits has not been consistently established in Chinese populations. The objective of this study was to investigate the association of FTO genetic polymorphisms with metabolic syndrome （MetS） in Han Chinese. Methods We tested 41 FTO single nucleotide polymorphisms （SNPs） for association between FTO and MetS-related traits. There were a total of 236 unrelated subjects （108 cases and 128 controls）, grouped according to the International Diabetes Federation （IDF） criteria. Results Of the 41 SNPs examined, only SNP rs8047395 exhibited statistical significance （P=-0.026） under a recessive model, after Bonferroni adjustment for multiple testing （OR 1.64, 95% CI 1.11-2.42; P=-0.014）. The common distributions of this polymorphism among Chineseawith a minor allele frequency （MAF） of 36% in the control group versus 48% in the Met$ group--greatly improved our test power in a relatively small sample size for an association study. Previously identified obesity- （or T2DM-） associated FTO SNPs were less common in Hart Chinese and were not associated with MetS in this study. No significant associations were found between our FTO SNPs and any endophenotypes of MetS. Conclusions A more common risk-conferring variant of FTO for MetS was identified in Han Chinese. Our study substantiated that genetic variations in FTO locus are involved in the pathogenesis of MetS.