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  • Title: Immunogenetic studies in families of children with juvenile dermatomyositis.
    Author: Reed AM, Pachman LM, Hayford J, Ober C.
    Journal: J Rheumatol; 1998 May; 25(5):1000-2. PubMed ID: 9598907.
    Abstract:
    OBJECTIVE: We reported an association between juvenile dermatomyositis (JDMS) and the HLA-DQA1*0501 allele. The purpose of this study was to determine whether there is evidence for linkage between JDMS and the DQA1*0501 allele in JDMS families. METHODS: The study population included 18 unrelated patients with JDMS, their parents, and 49 unaffected siblings. Using molecular genetic techniques, we studied the HLA genes, DRB1, DQA1, and tumor necrosis factor-alpha. RESULTS: Using the transmission disequilibrium test, we confirmed our earlier observations that the HLA-DQA1*0501 allele confers primary susceptibility to JDMS. CONCLUSION: DQA1*0501 confers genetic risk for JDMS; we cannot exclude the effects of alleles at other linked loci that were not studied or interactive effects between DQA1 alleles and alleles at other loci.
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