Polymorphisms in IL10 are associated with total Immunoglobulin e levels and Schistosoma mansoni infection intensity in a Brazilian population

A. V. Grant, M. I. Araujo, E. V. Ponte, R. R. Oliveira, A. A. Cruz, K. C. Barnes, T. H. Beaty

Research output: Contribution to journalArticlepeer-review

Abstract

Interleukin (IL)-10 is a regulatory cytokine of the helper T cell type 2 (TH2) pathway, which underlies both the host defense to helminthic infection and atopic diseases, including asthma. Although IL10 promoter polymorphisms are associated with increased atopy risk, IL10 variation has not been thoroughly explored in schistosomiasis-endemic populations. Three atopy-related IL10 promoter polymorphisms (rs1800896, rs1800871 and rs1800872), complemented by six tagging single-nucleotide polymorphisms (SNPs), were genotyped in 812 individuals in 318 nuclear families from a schistosomiasis-endemic area in Brazil. Associations between markers and total serum Immunoglobulin E (tIgE) levels, indicating non-specific activation of the TH2 pathway, and Schistosoma mansoni fecal egg counts, indicating burden of infection reflecting effectiveness of schistosomiasis host immunity, were performed using family-based transmission disequilibrium tests for quantitative traits (QTDTs). Alleles A, T and A at the three promoter SNPs rs1800896, rs1800871 and rs1800872 were associated with high tIgE levels in the same direction as in atopy populations (P=0.0008, 0.026 and 0.045), but not with egg counts. IL10 promoter polymorphisms appear to influence non-specific tIgE levels, but not schistosomiasis-specific immunity. The tagging SNP rs3024495 was associated with high S. mansoni egg counts (P=0.005), suggesting a novel locus in IL10 may influence clinically relevant burden of infection.

Original languageEnglish (US)
Pages (from-to)46-50
Number of pages5
JournalGenes and immunity
Volume12
Issue number1
DOIs
StatePublished - Jan 2011

Keywords

  • IL-10
  • IgE
  • atopy
  • genetic susceptibility
  • promoter polymorphism
  • schistosomiasis

ASJC Scopus subject areas

  • Immunology
  • Genetics
  • Genetics(clinical)

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