Hetero and homozygosity of MHC class II gene products in systemic lupus erythematosus*
TISSUE ANTIGENS(1991)
Abstract
An analysis of HLA class II antigens in 356 white patients with systemic lupus erythematosus (SLE) showed that all HLA-DR and -DQ homozygous and heterozygous combinations appear with frequencies expected from the observed gene frequencies. HLA-DR2 and HLA-DR3 gene frequencies were both increased in SLE, as were the odds ratios of all DR2 and DR3 hetero- and homozygous combinations. HLA-DR2/C4AQ0 heterozygotes were also not increased over expected values. Therefore, gene complementation at MHC loci does not contribute to susceptibility to SLE, but rather one or two MHC allele(s) in linkage with HLA-DR2 and HLA-DR3.
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Key words
SYSTEMIC LUPUS-ERYTHEMATOSUS,GENETICS,HLA ANTIGENS,HETEROZYGOSITY,MHC
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