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Diabetes-associated HLA genotypes affect birthweight in the general population.

In English

Författare

Summary, in English

Aims/hypothesisThe aim of our study was to test the hypothesis that HLA genotypes conferring risk of diabetes, cord blood autoantibodies, or both are associated with increased birthweight. Methods: HLA genotypes were determined in dried blood spots of cord blood from a total of 16,709 children born to healthy mothers in the Diabetes Prediction in Skane (DiPiS) study, a population-based observational clinical investigation of newborn children. Children born to mothers with diabetes or gestational diabetes were excluded. Autoantibodies to glutamic acid decarboxylase (GAD65Ab) and insulinoma-associated protein 2 were determined in standard radioligand binding assays. Birthweight was adjusted for gestational age and divided into quartiles. The upper quartile was defined as high relative birthweight (HrBW) and the lower quartile as low relative birthweight (LrBW). Results: Genotypes conferring risk of type 1 diabetes were strongly associated with relative birthweight (rBW) (p=0.01). The high-risk HLA-DQ2/8, DQ8/0604 and DQ8/X genotypes were associated with HrBW (odds ratio [OR] [95% CI]=1.20 [1.08-1.33], p=0.0006). The HLA-DQB1*0603 allele, which is negatively associated with type 1 diabetes, was also associated with HrBW (p=0.025), confirming a previous report on DQB1*0603-linked HLA-DR13. GAD65Ab were negatively associated with HrBW (OR [95% CI]=0.72 [0.56-0.93], p=0.01). Regression analysis showed that the HLA-associated increase in rBW was independent of confounding factors. Conclusions/Interpreation: HLA genotypes may be associated with intrauterine growth independent of type 1 diabetes risk. The epidemiological observation that high birthweight is a risk factor for type 1 diabetes could possibly result from a moderating effect on intrauterine growth of HLA genotypes conferring a high risk of diabetes.

Publiceringsår

2005

Språk

Engelska

Sidor

1484-1491

Publikation/Tidskrift/Serie

Diabetologia

Volym

48

Issue

Jul 1

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Endocrinology and Diabetes

Nyckelord

  • IA-2 autoantibodies
  • HLA-DQ8
  • HLA
  • GAD65 autoantibodies
  • birthweight
  • diabetes mellitus
  • insulin-dependent diabetes
  • screening
  • type 1 diabetes
  • HLA-DQ2

Status

Published

Forskningsgrupp

  • Paediatric Endocrinology
  • Celiac Disease and Diabetes Unit
  • Genomics, Diabetes and Endocrinology

ISBN/ISSN/Övrigt

  • ISSN: 1432-0428