COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY

Association of TCF7L2 polymorphisms with susceptibility to type 2 diabetes in 4,087 Japanese subjects

Kazuaki Miyake, Yukio Horikawa, Kazuo Hara, Kazuki Yasuda, Haruhiko Osawa, Hiroto Furuta, Yushi Hirota, Kazuya Yamagata, Yoshinori Hinokio, Yoshitomo Oka, Naoko Iwasaki, Yasuhiko Iwamoto, Yuichiro Yamada, Yutaka Seino, Hiroshi Maegawa, Atsunori Kashiwagi, Ken Yamamoto, Katsushi Tokunaga, Jun Takeda, Hideichi Makino, Kishio Nanjo, Takashi Kadowaki, Masato Kasuga
Journal of Human Genetics 2008, 53 (2): 174-80
18097733
Transcription factor 7-like 2 (TCF7L2) has been shown to be associated with type 2 diabetes mellitus in multiple ethnic groups. Regarding the Asian population, Horikoshi et al. (Diabetologia 50:747-751, 2007) and Hayashi et al. (Diabetologia 50:980-984, 2007) reported that single nucleotide polymorphisms (SNPs) in TCF7L2 were associated with type 2 diabetes in the Japanese population, while contradictory results were reported for Han Chinese populations. The aim of this study was to investigate the associations of the TCF7L2 gene with type 2 diabetes using a relatively large sample size: 2,214 Japanese individuals with type 2 diabetes and 1,873 normal controls. The minor alleles of rs7903146, rs11196205, and rs12255372 showed significant associations with type 2 diabetes (OR=1.48, P=2.7 x 10(-4); OR=1.39, P=4.6 x 10(-4); OR=1.70, P=9.8 x 10(-5), respectively) in the combined sample sets. However, neither rs11196218 nor rs290487 showed a significant association. These results indicate that TCF7L2 is an important susceptibility gene for type 2 diabetes in the Japanese population.

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