title: Gene-gene interactions of IL13 and IL4RA variants in immediate allergic reactions to betalactam antibiotics.
abstract: OBJECTIVE
  Immediate reactions - particularly anaphylactic ones - to betalactams are the most common adverse reactions to antibiotics mediated by a specific immunologic mechanism. The genetic risk factors influencing these mechanisms are poorly known. We aimed to evaluate the association between immediate allergic reactions to betalactams and the polymorphisms of IL13 (R130Q and -1055C>T variants) and IL4RA (I50V, S478P, and Q551R variants).
  
  
  METHODS
  We determined these gene variants in 210 patients and 265 age-paired and gender-paired control subjects from Italy.
  
  
  RESULTS
  The combination of the less frequent allele of the IL13 R130Q polymorphism with any of the predominant homozygous genotypes of the three polymorphisms of IL4RA was more significantly associated with the risk of betalactam allergy (P=0.0006, 0.0077, and 0.0041, respectively) than any polymorphism considered alone (P=0.1745, 0.0268, 0.1812, 0.0152, respectively). The same associations were observed with serum IgE levels (IL13/IL4RA variant combinations: P=0.0009, 0.0007, 0.0020, respectively and each variant: P=0.0201, 0.0021, 0.0531, and 0.0417, respectively). The combination of IL4RA variants with -1055 C>T polymorphism produced similar associations.
  
  
  CONCLUSIONS
  Our data suggest that these combinations of IL13 and IL4RA variants are predictors of immediate allergic reactions to betalactams through a mechanism related to IgE production.
authors.affiliation: Inserm U-724, Faculté de Médecine, University of Nancy-Henri Poincaré and Department of Clinical Chemistry, Nutrition and Metabolism, University Hospital, Nancy-Vandoeuvre, France.
authors.forename: Rosa-Maria
authors.initials: RM
authors.lastname: Guéant-Rodriguez
authors.forename: Antonino
authors.initials: A
authors.lastname: Romano
authors.forename: Mylène
authors.initials: M
authors.lastname: Béri-Dexheimer
authors.forename: Marinella
authors.initials: M
authors.lastname: Viola
authors.forename: Francesco
authors.initials: F
authors.lastname: Gaeta
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Guéant
mesh_terms: D000328:Adult; D000900:Anti-Bacterial Agents / Q000009:adverse effects*; D001483:Base Sequence; D017931:DNA Primers; D004342:Drug Hypersensitivity / Q000235:genetics*; D004843:Epistasis, Genetic; D005260:Female; D006801:Humans; D018793:Interleukin-13 / Q000235:genetics*; D053662:Interleukin-4 Receptor alpha Subunit / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D047090:beta-Lactams / Q000009:adverse effects*
chemical_list: D000900:Anti-Bacterial Agents; D017931:DNA Primers; C504000:IL4R protein, human; D018793:Interleukin-13; D053662:Interleukin-4 Receptor alpha Subunit; D047090:beta-Lactams