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Diabetologia

, Volume 39, Issue 11, pp 1313–1317 | Cite as

HLA-DQB1*0201/0302 is associated with severe retinopathy in patients with IDDM

  • D. Agardh
  • L. K. Gaur
  • E. Agardh
  • M. Landin-Olsson
  • C.-D. Agardh
  • Å. Lernmark

Summary

Some insulin-dependent diabetic (IDDM) patients develop severe forms of retinopathy. Putative risk factors such as hypertension, poor metabolic control, nephropathy and growth hormone levels do not fully explain the progress of retinopathy in these patients. It has been discussed whether there is a genetic marker, since some diabetic patients without any known predisposing risk factors develop severe retinopathy and others do not. In the present study, HLA-DR and DQ were compared in two patient groups with IDDM. One group consisted of patients with early-onset diabetes, with severe non-proliferative or proliferative retinopathy; the other group had no or only mild signs of retinopathy. High resolution HLA typing was carried out by polymerase chain reaction (PCR) and hybridization with allele specific probes. Alleles on the DR3-DQ2 haplotype, DRB1*0301, DQA1*0501 and DQB1*0201, were more frequent in patients with severe retinopathy. A difference was seen when combining certain alleles in the genotypes of DQA1*03/0501 (p > 0.05) and DQB1*0201/0302 (p < 0.01). The findings of the present study suggest that DQB1*0201/0302 is the strongest genetic marker for severe retinopathy and DRB1*0301/0401 only has a secondary influence when combined with this genotype. It seems as if IDDM patients who are positive for the genotype DR3-DQ2/DR4-DQ8 (DRB1*0301-DQA1*0501-DQB1*0201/DRB1*0401 -DQA1*03-DQB1*0302) are at greater risk of developing severe retinopathy. [Diabetologia (1996) 39: 1313–1317]

Keywords Severe retinopathy insulin-dependent diabetes mellitus HLA-DR HLA-DQ allele haplotype genotype. 

Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • D. Agardh
    • 1
  • L. K. Gaur
    • 2
  • E. Agardh
    • 3
  • M. Landin-Olsson
    • 1
  • C.-D. Agardh
    • 1
  • Å. Lernmark
    • 4
  1. 1.Diabetes and Endocrinology Unit, Department of Internal Medicine, University Hospital, Lund, SwedenSE
  2. 2.Department of Immunogenetics, Puget Sound Blood Center and Program, Seattle, Washington, USAUS
  3. 3.Department of Ophthalmology, University Hospital, Lund, SwedenSE
  4. 4.Department of Medicine, R. H. Williams Laboratory, University of Washington, Department of Medicine, Seattle, Washington, USAUS

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