PMID- 20085713 OWN - NLM STAT- MEDLINE DCOM- 20100225 LR - 20240317 IS - 1537-6605 (Electronic) IS - 0002-9297 (Print) IS - 0002-9297 (Linking) VI - 86 IP - 1 DP - 2010 Jan TI - Identification of KCNJ15 as a susceptibility gene in Asian patients with type 2 diabetes mellitus. PG - 54-64 LID - 10.1016/j.ajhg.2009.12.009 [doi] AB - Recent advances in genome research have enabled the identification of new genomic variations that are associated with type 2 diabetes mellitus (T2DM). Via fine mapping of SNPs in a candidate region of chromosome 21q, the current study identifies potassium inwardly-rectifying channel, subfamily J, member 15 (KCNJ15) as a new T2DM susceptibility gene. KCNJ15 is expressed in the beta cell of the pancreas, and a synonymous SNP, rs3746876, in exon 4 (C566T) of this gene, with T allele frequency among control subjects of 3.1%, showed a significant association with T2DM affecting lean individuals in three independent Japanese sample sets (p = 2.5 x 10(-7), odds ratio [OR] = 2.54, 95% confidence interval [CI] = 1.76-3.67) and with unstratified T2DM (p = 6.7 x 10(-6), OR = 1.76, 95% CI = 1.37-2.25). The diabetes risk allele frequency was, however, very low among Europeans in whom no association between this variant and T2DM could be shown. Functional analysis in human embryonic kidney 293 cells demonstrated that the risk allele of the synonymous SNP in exon 4 increased KCNJ15 expression via increased mRNA stability, which resulted in the higher expression of protein as compared to that of the nonrisk allele. We also showed that KCNJ15 is expressed in human pancreatic beta cells. In conclusion, we demonstrated a significant association between a synonymous variant in KCNJ15 and T2DM in lean Japanese patients with T2DM, suggesting that KCNJ15 is a previously unreported susceptibility gene for T2DM among Asians. CI - 2010 The American Society of Human Genetics. Published by Elsevier Inc. FAU - Okamoto, Koji AU - Okamoto K AD - Department of Human Genetics, Graduate School of Tokyo University, Japan. FAU - Iwasaki, Naoko AU - Iwasaki N FAU - Nishimura, Chisa AU - Nishimura C FAU - Doi, Kent AU - Doi K FAU - Noiri, Eisei AU - Noiri E FAU - Nakamura, Shinko AU - Nakamura S FAU - Takizawa, Miho AU - Takizawa M FAU - Ogata, Makiko AU - Ogata M FAU - Fujimaki, Risa AU - Fujimaki R FAU - Grarup, Niels AU - Grarup N FAU - Pisinger, Charlotta AU - Pisinger C FAU - Borch-Johnsen, Knut AU - Borch-Johnsen K FAU - Lauritzen, Torsten AU - Lauritzen T FAU - Sandbaek, Annelli AU - Sandbaek A FAU - Hansen, Torben AU - Hansen T FAU - Yasuda, Kazuki AU - Yasuda K FAU - Osawa, Haruhiko AU - Osawa H FAU - Nanjo, Kishio AU - Nanjo K FAU - Kadowaki, Takashi AU - Kadowaki T FAU - Kasuga, Masato AU - Kasuga M FAU - Pedersen, Oluf AU - Pedersen O FAU - Fujita, Toshiro AU - Fujita T FAU - Kamatani, Naoyuki AU - Kamatani N FAU - Iwamoto, Yasuhiko AU - Iwamoto Y FAU - Tokunaga, Katsushi AU - Tokunaga K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Hum Genet JT - American journal of human genetics JID - 0370475 RN - 0 (KCNJ15 protein, human) RN - 0 (Potassium Channels, Inwardly Rectifying) SB - IM MH - Adult MH - Aged MH - Asian People MH - Case-Control Studies MH - Chromosomes, Human, Pair 21 MH - Diabetes Mellitus, Type 2/*ethnology/*genetics MH - Female MH - *Genetic Predisposition to Disease MH - Humans MH - Insulin-Secreting Cells/metabolism MH - Male MH - Middle Aged MH - Polymorphism, Single Nucleotide MH - Potassium Channels, Inwardly Rectifying/*genetics/*physiology PMC - PMC2801752 EDAT- 2010/01/21 06:00 MHDA- 2010/02/26 06:00 PMCR- 2010/07/08 CRDT- 2010/01/21 06:00 PHST- 2009/09/04 00:00 [received] PHST- 2009/11/07 00:00 [revised] PHST- 2009/12/04 00:00 [accepted] PHST- 2010/01/21 06:00 [entrez] PHST- 2010/01/21 06:00 [pubmed] PHST- 2010/02/26 06:00 [medline] PHST- 2010/07/08 00:00 [pmc-release] AID - S0002-9297(09)00570-9 [pii] AID - AJHG538 [pii] AID - 10.1016/j.ajhg.2009.12.009 [doi] PST - ppublish SO - Am J Hum Genet. 2010 Jan;86(1):54-64. doi: 10.1016/j.ajhg.2009.12.009.