Journal
JOURNAL OF IMMUNOLOGY
Volume 166, Issue 6, Pages 3915-3922Publisher
AMER ASSOC IMMUNOLOGISTS
DOI: 10.4049/jimmunol.166.6.3915
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- NIAMS NIH HHS [R01 AR33062, T32 AR07350, P50 AR45231] Funding Source: Medline
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Family studies of first-degree relatives and analysis of twins indicate that as much as 75% of the differences in quantitative IL-10 production in man derive from heritable genetic factors. Studies of single nucleotide polymorphisms (SNP) in the proximal 1.0 kb of the IL-IO promoter have yielded inconsistent association with IL-10 production and variable results in promoter-reporter studies. However, in normal donors, an association of quantitative production with certain alleles of the IL-10.R short tandem repeat polymorphism at -4.0 kb suggested that SNPs in the more distal promoter might be informative. We have identified seven novel SNP sites in the genomic sequence of the first 4 kb of the IL-10 promoter region 5' to the ATG start site from Caucasian individuals with either a high or a low IL-10 production phenotype. We have also identified eight SNP haplotypes in the distal promoter that segregate with significant differences in quantitative IL-10 production in normal donors. These SNPs are significantly associated with systemic lupus erythematosus in African-Americans and may define one component of the genetic susceptibility to systemic lupus erythematosus in this group.
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