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Sökning: WFRF:(Perheentupa J)

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  • Paquette, J., et al. (författare)
  • Risk of autoimmune diabetes in APECED : association with short alleles of the 5 ' insulin VNTR
  • 2010
  • Ingår i: Genes and Immunity. - : Springer Science and Business Media LLC. - 1466-4879 .- 1476-5470. ; 11:7, s. 590-597
  • Tidskriftsartikel (refereegranskat)abstract
    • Autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) is a rare autoimmune disease causing a wide spectrum of autoimmune dysfunction potentially including diabetes of an autoimmune etiology. We have previously described a pair of discordant APECED siblings and pointed to a possible role of 5' insulin variable number of tandem repeats (VNTR) locus IDDM2 in the appearance of diabetes within this disease. In vitro studies have previously suggested that class I VNTR alleles were associated with decreased fetal thymic insulin expression. We genotyped the 5' INS VNTR locus and several flanking 11p15.5 markers in 5' Finnish APECED subjects and explored the possible contribution of IDDM2 in the development of diabetes. The shorter 5' INS VNTR class I alleles (<35 repeats) were more prevalent in the diabetic Finnish APECED subjects than in non-diabetic APECED subjects. Logistic regression analysis revealed that having 1 short (<35) VNTR allele did not increase the risk of developing diabetes (95% CI 0.6-27.0), whereas having 2 short alleles conferred a 43.5-fold increased risk (95% CI 3.0-634.6). We conclude that short 5' INS VNTR class I alleles play a role in susceptibility to autoimmune diabetes in the context of APECED.
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  • Halonen, M, et al. (författare)
  • AIRE mutations and human leukocyte antigen genotypes as determinants of the autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy phenotype
  • 2002
  • Ingår i: Journal of Clinical Endocrinology and Metabolism. - 0021-972X .- 1945-7197. ; 87:6, s. 2568-
  • Tidskriftsartikel (refereegranskat)abstract
    • Autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED, OMIM 240300) is a rare autoimmune disease caused by mutations in the autoimmune regulator (AIRE) gene on chromosome 21q22.3. This monogenic disease provides an interesting model for studies of other common and more complex autoimmune diseases. The most common components of APECED are chronic mucocutaneous candidiasis, hypoparathyroidism, and Addison’s disease, but several other endocrine deficiencies and ectodermal dystrophies also occur and the phenotype varies widely. The AIRE genotype also varies; 42 different mutations have been reported so far. To understand the complexity of the phenotype, we studied the AIRE and human leukocyte antigen (HLA) class II genotypes in a series of patients with APECED. The only association between the phenotype and the AIRE genotype was the higher prevalence of candidiasis in the patients with the most common mutation, R257X, than in those with other mutations. Addison’s disease was associated with HLA-DRB1*03 (P = 0.021), alopecia with HLA-DRB1*04- DQB1*0302 (P < 0.001), whereas type 1 diabetes correlated negatively with HLA-DRB1*15-DQB1*0602 (P = 0.036). The same HLA associations have previously been established for non-APECED patients. We conclude that mutation of AIRE per se has little influence on the APECED phenotype, whereas, in contrast to earlier reports, HLA class II is a significant determinant.
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