Genetic variation in GIPR influences the glucose and insulin responses to an oral glucose challenge

Richa Saxena, Marie-France Hivert, Claudia Langenberg, Toshiko Tanaka, James S Pankow, Peter Vollenweider, Valeriya Lyssenko, Nabila Bouatia-Naji, Josée Dupuis, Anne U Jackson, W H Linda Kao, Man Li, Nicole L Glazer, Alisa K Manning, Jian'an Luan, Heather M Stringham, Inga Prokopenko, Toby Johnson, Niels Grarup, Trine W BoesgaardCécile Lecoeur, Peter Shrader, Jeffrey O'Connell, Erik Ingelsson, David J Couper, Kenneth Rice, Kijoung Song, Camilla H Andreasen, Christian Dina, Anna Köttgen, Olivier Le Bacquer, François Pattou, Jalal Taneera, Valgerdur Steinthorsdottir, Denis Rybin, Kristin Ardlie, Michael Sampson, Lu Qi, Mandy van Hoek, Michael N Weedon, Yurii S Aulchenko, Benjamin F Voight, Harald Grallert, Beverley Balkau, Richard N Bergman, Knut Borch-Johnsen, Torben Jørgensen, Thomas Sparsø, Torben Hansen, Oluf Pedersen, GIANT Consortium

468 Citations (Scopus)

Abstract

Glucose levels 2 h after an oral glucose challenge are a clinical measure of glucose tolerance used in the diagnosis of type 2 diabetes. We report a meta-analysis of nine genome-wide association studies (n = 15,234 nondiabetic individuals) and a follow-up of 29 independent loci (n = 6,958-30,620). We identify variants at the GIPR locus associated with 2-h glucose level (rs10423928, Β (s.e.m.) = 0.09 (0.01) mmol/l per A allele, P = 2.0 × 10 15). The GIPR A-allele carriers also showed decreased insulin secretion (n = 22,492; insulinogenic index, P = 1.0 × 10 17; ratio of insulin to glucose area under the curve, P = 1.3 × 10 16) and diminished incretin effect (n = 804; P = 4.3 × 10 4). We also identified variants at ADCY5 (rs2877716, P = 4.2 × 10 16), VPS13C (rs17271305, P = 4.1 × 10 8), GCKR (rs1260326, P = 7.1 × 10 11) and TCF7L2 (rs7903146, P = 4.2 × 10 10) associated with 2-h glucose. Of the three newly implicated loci (GIPR, ADCY5 and VPS13C), only ADCY5 was found to be associated with type 2 diabetes in collaborating studies (n = 35,869 cases, 89,798 controls, OR = 1.12, 95% CI 1.09-1.15, P = 4.8 × 10 18).

Original languageEnglish
JournalNature Genetics
Volume42
Issue number2
Pages (from-to)142-8
Number of pages7
ISSN1061-4036
DOIs
Publication statusPublished - 1 Feb 2010

Keywords

  • Adenylate Cyclase
  • Body Mass Index
  • Denmark
  • Diabetes Mellitus, Type 2
  • Female
  • Gene Expression Profiling
  • Gene Expression Regulation
  • Genetic Loci
  • Genetic Variation
  • Genome-Wide Association Study
  • Glucose
  • Glucose Tolerance Test
  • Humans
  • Incretins
  • Insulin
  • Male
  • Meta-Analysis as Topic
  • Polymorphism, Single Nucleotide
  • Proteins
  • RNA, Messenger
  • Receptors, Gastrointestinal Hormone

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