BACKGROUND: The measles virus (MV) interacts with two known cellular receptors: CD46 and SLAM. The transmembrane receptor CD209 interacts with MV and augments dendritic cell infection. METHODS: 764 subjects previously immunized with measles-mumps-rubella vaccine were genotyped for 66 candidate SNPs in the CD46, SLAM and CD209 genes as part of a larger study. RESULTS: A previously detected association of the CD46 SNP rs2724384 with measles-specific antibodies was successfully replicated in this study. Increased representation of the minor allele G for an intronic CD46 SNP was associated with an allele dose-related decrease (978 vs. 522 mIU/ml, p = 0.0007) in antibody levels. This polymorphism rs2724384 also demonstrated associations with IL-6 (p = 0.02), IFN-α (p = 0.007) and TNF-α (p = 0.0007) responses. Two polymorphisms (coding rs164288 and intronic rs11265452) in the SLAM gene that were associated with measles antibody levels in our previous study were associated with IFN-γ Elispot (p = 0.04) and IL-10 responses (p = 0.0008), respectively, in this study. We found associations between haplotypes, AACGGAATGGAAAG (p = 0.009) and GGCCGAGAGGAGAG (p < 0.001), in the CD46 gene and TNF-α secretion. CONCLUSION: Understanding the functional and mechanistic consequences of these genetic polymorphisms on immune response variations could assist in directing new measles and potentially other viral vaccine design, and in better understanding measles immunogenetics.
BACKGROUND: The measles virus (MV) interacts with two known cellular receptors: CD46 and SLAM. The transmembrane receptor CD209 interacts with MV and augments dendritic cell infection. METHODS: 764 subjects previously immunized with measles-mumps-rubella vaccine were genotyped for 66 candidate SNPs in the CD46, SLAM and CD209 genes as part of a larger study. RESULTS: A previously detected association of the CD46 SNP rs2724384 with measles-specific antibodies was successfully replicated in this study. Increased representation of the minor allele G for an intronic CD46 SNP was associated with an allele dose-related decrease (978 vs. 522 mIU/ml, p = 0.0007) in antibody levels. This polymorphism rs2724384 also demonstrated associations with IL-6 (p = 0.02), IFN-α (p = 0.007) and TNF-α (p = 0.0007) responses. Two polymorphisms (coding rs164288 and intronic rs11265452) in the SLAM gene that were associated with measles antibody levels in our previous study were associated with IFN-γ Elispot (p = 0.04) and IL-10 responses (p = 0.0008), respectively, in this study. We found associations between haplotypes, AACGGAATGGAAAG (p = 0.009) and GGCCGAGAGGAGAG (p < 0.001), in the CD46 gene and TNF-α secretion. CONCLUSION: Understanding the functional and mechanistic consequences of these genetic polymorphisms on immune response variations could assist in directing new measles and potentially other viral vaccine design, and in better understanding measles immunogenetics.
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