D6S265*15 marks a DRB1*15, DQB1*0602 haplotype associated with attenuated protection from type 1 diabetes mellitus

A. M. Valdes, G. Thomson, J. Graham, M. Zarghami, B. McNeney, I. Kockum, A. Smith, M. Lathrop, A. R. Steenkiste, J. S. Dorman, J. A. Noble, J. A. Hansen, A. Pugliese, Å Lernmark

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Aims/hypothesis: The HLA class II DQB1*0602 allele confers strong dominant protection against type 1 diabetes but protection is not absolute. The aim of this study was to identify markers within the HLA region that differentiate DQB1*0602 haplotypes and show different associations with disease risk. Methods: We defined alleles at eight microsatellite markers spanning the HLA region in a case-control cohort from Sweden. Results: We found that allele 15 at marker D6S265 (109 kb centromeric of HLA-A) was over-represented among patients carrying DRB1*15, DQB1*0602. A detailed haplotype analysis showed that DRB1*15, DQB1*0602 haplotypes carrying D6S265*15 have a ten-fold higher odds ratio (OR) than those carrying other alleles and thus confer reduced protection [OR D6S265*15=0.186 (95% CI 0.074, 0.472) vs OR D6S265*15-=0.017 (95% CI 0.005, 0.062), p<0.001]. Conclusions/interpretation: Our data support the existence of a locus that modifies the protective effect associated with DQB1*0602. Typing for allele D6S265*15 can identify a less protective DQB1*0602 haplotype, thereby allowing a more accurate prediction of type 1 diabetes risk.

Original languageEnglish (US)
Pages (from-to)2540-2543
Number of pages4
Issue number12
StatePublished - Dec 2005


  • 0602
  • D6S265
  • DQB1
  • HLA-DQ antigens
  • IDDM
  • Type 1 diabetes mellitus

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism


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