Low-frequency and rare exome chip variants associate with fasting glucose and type 2 diabetes susceptibility
- PMID: 25631608
- PMCID: PMC4311266
- DOI: 10.1038/ncomms6897
Low-frequency and rare exome chip variants associate with fasting glucose and type 2 diabetes susceptibility
Abstract
Fasting glucose and insulin are intermediate traits for type 2 diabetes. Here we explore the role of coding variation on these traits by analysis of variants on the HumanExome BeadChip in 60,564 non-diabetic individuals and in 16,491 T2D cases and 81,877 controls. We identify a novel association of a low-frequency nonsynonymous SNV in GLP1R (A316T; rs10305492; MAF=1.4%) with lower FG (β=-0.09±0.01 mmol l(-1), P=3.4 × 10(-12)), T2D risk (OR[95%CI]=0.86[0.76-0.96], P=0.010), early insulin secretion (β=-0.07±0.035 pmolinsulin mmolglucose(-1), P=0.048), but higher 2-h glucose (β=0.16±0.05 mmol l(-1), P=4.3 × 10(-4)). We identify a gene-based association with FG at G6PC2 (pSKAT=6.8 × 10(-6)) driven by four rare protein-coding SNVs (H177Y, Y207S, R283X and S324P). We identify rs651007 (MAF=20%) in the first intron of ABO at the putative promoter of an antisense lncRNA, associating with higher FG (β=0.02±0.004 mmol l(-1), P=1.3 × 10(-8)). Our approach identifies novel coding variant associations and extends the allelic spectrum of variation underlying diabetes-related quantitative traits and T2D susceptibility.
Conflict of interest statement
J.C.F. has received consulting honoraria from PanGenX and Pfizer; T.F. consulted for Boeringer Ingelheim; J.B.M. serves as a consultant to LipoScience, and Quest Diagnostics; B.P. serves on the DSMB of a clinical trial for a device funded by the manufacturer (Zoll LifeCor) and on the Steering Committee for the Yale Open Data Access Project funded by Johnson & Johnson; D.M.W., M.G.E., L.L. and J.A. are all full time employees of GlaxoSmithKline. P.M.R. and D.I.C. have research grant support from Amgen, AstraZeneca and the NHLBI. The remaining authors declare no competing financial interests.
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