Human Leukocyte Antigen and Cytokine Gene Variants as Predictors of Recurrent Chlamydia trachomatis Infection in High‐Risk Adolescents
Departments of 1Epidemiology, 2Medicine, and 3Pediatrics, University of Alabama at Birmingham, Birmingham; 4Department of Scientific Affairs, Berlex Laboratories, Seattle, Washington
Antigen presentation and immune activation are essential to the effective control of infectious diseases. In 485 North American adolescents at high risk for genital Chlamydia trachomatis infection, we found 2 human leukocyte antigen variants (DRB1*03‐DQB1*04 and DQB1*06) to be associated with recurrent Chlamydia infection (adjusted relative odds [RO], >2.0;
, for both variants). A G‐C‐C haplotype corresponding to variants at IL10 (encoding interleukin‐10 [IL‐10]) promoter positions −1082, −819, and −592 was underrepresented in individuals with recurrent infection (RO, 0.59;
). These genetic associations were independent of nongenetic factors, including number of sex partners, race, sex, duration of follow‐up, and human immunodeficiency virus type 1 seropositivity. Consistent with the observed IL10 association, cervical secretions in female adolescents without the IL10 G‐C‐C haplotype had elevated IL‐10 concentrations after Chlamydia infection, which may reflect involvement of a Chlamydia‐specific mechanism for genetically mediated, differential IL‐10 expression in the genital tract.
Received 20 August 2004; accepted 3 November 2004; electronically published 25 February 2005.
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Financial support: National Institute of Child Health and Human Development (Reaching for Excellence in Adolescent Care and Health project grants HD32830 and HD32842); National Institute of Allergy and Infectious Diseases (grants AI41530, AI41951, and AI51173 to R.A.K. and J.T.); Centers for Disease Control and Prevention (Sexually Transmitted Disease Faculty Expansion Program grant R30 CCR421113 to W.M.G.).





