Latent autoimmune diabetes in adults differs genetically from classical type 1 diabetes diagnosed after the age of 35 years

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • Lepola, Mette Andersen
  • Virve Lundgren
  • Joni A. Turunen
  • Carol Forsblom
  • Bo Isomaa
  • Per Henrik Groop
  • Leif Groop
  • Tiinamaija Tuomi

OBJECTIVE - We studied differences between patients with latent autoimmune diabetes in adults (LADA), type 2 diabetes, and classical type 1 diabetes diagnosed after age 35 years. RESEARCH DESIGN AND METHODS - Polymorphisms in HLA-DQB1, INS, PTPN22, and CTLA4 were genotyped in patients with LADA (n = 213), type 1 diabetes diagnosed at >35 years of age (T1D>35y; n = 257) or <20 years of age (T1D<20y; n = 158), and type 2 diabetes. RESULTS - Although patients with LADA had an increased frequency of HLA-DQB1 and PTPN22 risk genotypes and alleles compared with type 2 diabetic subjects, the frequency was significantly lower compared with T1D >35y patients. Genotype frequencies, measures of insulin secretion, and metabolic traits within LADA differed according to GAD antibody (GADA) quartiles, but even the highest quartile differed from type 1 diabetes. Having two or more risk genotypes was associated with lower C-peptide concentrations in LADA. CONCLUSIONS - LADA patients differed genetically and phenotypically from both T1D>35y and type 2 diabetic patients in a manner dependent on GADA levels.

TidsskriftDiabetes Care
Udgave nummer9
Sider (fra-til)2062-2064
Antal sider3
StatusUdgivet - 1 sep. 2010

ID: 200858529