title: Toll-like receptor 1 N248S polymorphism affects T helper 1 cytokine production and is associated with serum immunoglobulin E levels in Taiwanese allergic patients.
abstract: OBJECTIVE
  This study was carried out to investigate whether toll-like receptor-1 (TLR1) rs4833095 (N248S) variant, common in the Taiwanese population, contributes to pathogenesis of allergy.
  
  
  METHODS
  TLR2/1 ligand Pam3CSK4-stimulated cytokine production in peripheral blood mononuclear cells and monocyte-derived dendritic cells of different genotypes were measured via enzyme-linked immunosorbent assay. Ninety-three Taiwanese allergic patients (with asthma, allergic rhinitis, or atopic dermatitis) and 76 controls were recruited for genotyping. Serum immunoglobulin E (IgE) levels were evaluated in 60 allergic patients.
  
  
  RESULTS
  The homozygous TLR1 C variant allele carrier had increased Pam3CSK4-induced tumor necrosis factor-α and interleukin-12 responses in peripheral blood mononuclear cells and monocyte-derived dendritic cells, respectively. Furthermore, although the C/C genotype was not associated with susceptibility to atopic diseases, it was correlated with lower total IgE levels in sera of allergic patients.
  
  
  CONCLUSIONS
  Our data suggest that the TLR1 N248S polymorphism might play a role in Th1/Th2 differentiation, and the determination of serum IgE levels. However, interactions with other genetic and environmental factors might be required to contribute to risk of allergic diseases in our population.
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
authors.forename: Chin-An
authors.initials: CA
authors.lastname: Yang
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan; Medical Research, National Taiwan University Hospital, Taipei, Taiwan. Electronic address: gicmbor@ntu.edu.tw.
authors.forename: Bor-Luen
authors.initials: BL
authors.lastname: Chiang
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D016207:Cytokines / Q000378:metabolism*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D020022:Genetic Predisposition to Disease; D060005:Genotyping Techniques; D006801:Humans; D006967:Hypersensitivity / Q000235:genetics* / Q000473:pathology; D007073:Immunoglobulin E / Q000097:blood*; D008297:Male; D020125:Mutation, Missense; D011110:Polymorphism, Genetic; D044967:Serum / Q000737:chemistry; D013624:Taiwan; D018417:Th1 Cells / Q000276:immunology*; D051194:Toll-Like Receptor 1 / Q000235:genetics*
chemical_list: D016207:Cytokines; D051194:Toll-Like Receptor 1; D007073:Immunoglobulin E
keywords: Allergy; Genetic polymorphism; Immunoglobulin E; Toll-like receptor