PMID- 25800097 OWN - NLM STAT- MEDLINE DCOM- 20161213 LR - 20161230 IS - 1753-0407 (Electronic) IS - 1753-0407 (Linking) VI - 8 IP - 2 DP - 2016 Mar TI - Differential promoter activity by nucleotide substitution at a type 2 diabetes genome-wide association study signal upstream of the wolframin gene. PG - 253-9 LID - 10.1111/1753-0407.12289 [doi] AB - BACKGROUND: Functional knowledge of most genetic variants identified from genome-wide association studies (GWAS) for type 2 diabetes (T2D) is limited. A recent T2D GWAS revealed an association signal (rs4689388) upstream of the gene encoding Wolfram syndrome 1 (WFS1) whose intrinsic nucleotide variants had been previously associated with T2D in several candidate gene analyses. The aim of the present study was to identify functional variants of the GWAS signal. METHODS: Promoter activity of luciferase reporter constructs was compared with haplotypes including variants composing a linkage disequilibrium block in the vicinity of rs4689388 in HEK293 and HepG2 cells. RESULTS: Promoter activity was highest with the most frequent haplotype (H1; ATCGT) and lowest with second most frequent haplotype (H2; GATCG), whose nucleotide alleles were all complementary to those of H1. Further analysis with artificial haplotypes revealed differential transcriptional activity by nucleotide substitution of rs4320200, rs13107806, or rs13127445 (P < 0.05). This concurred with changes in predicted transcription factor binding site by their allele substitutions. CONCLUSIONS: The previously reported GWAS signal for T2D may be identified by the differential promoter activity of rs4320200, rs13107806, and rs13127445 in the promoter of WFS1 by nucleotide substitution. CI - (c) 2015 Ruijin Hospital, Shanghai Jiaotong University School of Medicine and Wiley Publishing Asia Pty Ltd. FAU - Ryu, Jihye AU - Ryu J AD - School of Systems Biomedical Science, Soongsil University, Seoul, Korea. FAU - Lee, Chaeyoung AU - Lee C AD - School of Systems Biomedical Science, Soongsil University, Seoul, Korea. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150609 PL - Australia TA - J Diabetes JT - Journal of diabetes JID - 101504326 RN - 0 (Membrane Proteins) RN - 0 (Transcription Factors) RN - 0 (wolframin protein) RN - EC 1.13.12.- (Luciferases) SB - IM MH - Alleles MH - Base Sequence MH - Binding Sites/genetics MH - Diabetes Mellitus, Type 2/*genetics MH - Gene Expression Profiling MH - Gene Frequency MH - Genetic Predisposition to Disease/*genetics MH - Genome-Wide Association Study/*methods MH - HEK293 Cells MH - Haplotypes MH - Hep G2 Cells MH - Humans MH - Linkage Disequilibrium MH - Luciferases/genetics/metabolism MH - Membrane Proteins/*genetics MH - *Polymorphism, Single Nucleotide MH - Promoter Regions, Genetic/*genetics MH - Transcription Factors/metabolism OTO - NOTNLM OT - 2型糖尿病 OT - genome-wide association OT - linkage disequilibrium OT - promoter activity OT - single nucleotide variant OT - type 2 diabetes OT - 全基因组关联 OT - 单核苷酸变异 OT - 启动子活性 OT - 连锁不平衡 EDAT- 2015/03/25 06:00 MHDA- 2016/12/15 06:00 CRDT- 2015/03/25 06:00 PHST- 2014/09/11 00:00 [received] PHST- 2015/02/09 00:00 [revised] PHST- 2015/02/22 00:00 [accepted] PHST- 2015/03/25 06:00 [entrez] PHST- 2015/03/25 06:00 [pubmed] PHST- 2016/12/15 06:00 [medline] AID - 10.1111/1753-0407.12289 [doi] PST - ppublish SO - J Diabetes. 2016 Mar;8(2):253-9. doi: 10.1111/1753-0407.12289. Epub 2015 Jun 9.