Association analysis of <Emphasis Type="Italic">SLC22A4</Emphasis>, <Emphasis Type="Italic">SLC22A5</Emphasis> and <Emphasis Type="Italic">DLG5</Emphasis> in Japanese patients with Crohn disease |
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| Authors: | Keiko?Yamazaki Masakazu?Takazoe Torao?Tanaka Toshiki?Ichimori Susumu?Saito Aritoshi?Iida Yoshihiro?Onouchi Akira?Hata Email author" target="_blank">Yusuke?NakamuraEmail author |
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| Institution: | (1) Laboratory of Molecular Medicine, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan;(2) Department of Medicine, Division of Gastroenterology, Social Insurance Central General Hospital, Tokyo, Japan;(3) Department of Medicine, Division of Gastroenterology, Suzaki Kuroshio Hospital, Kouchi, Japan;(4) Laboratory for Genotyping, SNP Research Center, The Institute of Physical and Chemical Research (RIKEN), Kanagawa, Japan;(5) Laboratory for Gastrointestinal Diseases, SNP Research Center, The Institute of Physical and Chemical Research (RIKEN), Kanagawa, Japan |
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| Abstract: | Crohn disease (CD) is an inflammatory bowel disease characterized by chronic transmural, segmental, and typically granulomatous inflammation of the gut. Recently, two novel candidate gene loci associated with CD, SLC22A4 and SLC22A5 on chromosome 5 known as IBD5 and DLG5 on chromosome 10, were identified through association analysis of Caucasian CD patients. We validated these candidate genes in Japanese patients with CD and found a weak but possible association with both SLC22A4 (P=0.028) and DLG5 (P=0.023). However, the reported genetic variants that were indicated to be causative in the Caucasian population were completely absent in or were not associated with Japanese CD patients. These findings imply significant differences in genetic background with CD susceptibility among different ethnic groups and further indicate some difficulty of population-based studies. |
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| Keywords: | Crohn disease Single-nucleotide polymorphism (SNP) DLG5 SLC22A4 SLC22A5 OCTN1 OCTN2 Japanese population |
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