Levels of innate immune factors in genital fluids: association of alpha defensins and LL-37 with genital infections and increased HIV acquisition
| Autor: | Pauline, Levinson, Rupert, Kaul, Joshua, Kimani, Elizabeth, Ngugi, Stephen, Moses, Kelly S, MacDonald, Kristina, Broliden, Taha, Hirbod, Allan R, Ronald |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
Sexually Transmitted Diseases Bacterial alpha-Defensins Adolescent Immunology HIV Infections Virus Young Adult Immune system Acquired immunodeficiency syndrome (AIDS) Cathelicidins Immunopathology medicine Immunology and Allergy Humans Protease inhibitor (pharmacology) Prospective Studies Defensin Immunity Mucosal Innate immune system biology Exudates and Transudates Genitalia Female Antibiotic Prophylaxis Middle Aged biology.organism_classification medicine.disease Virology Sex Work Immunity Innate Infectious Diseases Lentivirus Female Antimicrobial Cationic Peptides |
| Zdroj: | AIDS (London, England). 23(3) |
| ISSN: | 1473-5571 |
| Popis: | Background: Several mucosal innate immune proteins exhibit HIV inhibitory activity and their analogues are potential microbicide candidates. However, their clinical associations and in-vivo role in cervicovaginal host defense against HIV acquisition are poorly defined. Methods: Cervicovaginal secretions (CVSs) were collected from HIV uninfected Kenyan sex workers at enrolment into an HIV prevention trial. After trial completion, CVS from participants acquiring HIV (cases) and matched controls were assessed for levels of innate immune factors and HIV neutralizing capacity, by blinded investigators. Cross-sectional and prospective associations of innate immune factors were examined. Results: CVS contained high levels of defensins (human neutrophil peptide-1-3 and human beta defensin-2-3), LL-37 and secretory leukocyte protease inhibitor. Regulated upon activation normal T-cell expressed and secreted levels were lower, and IFN alpha was undetectable. CVS from 20% of participants neutralized a clade A primary HIV isolate, and 12% neutralized both clade A and C isolates. HIV neutralization was correlated with human neutrophil peptide-1-3 (alpha-defensins) and LL-37 levels. However, a.-defensin and LL-37 levels were increased in participants with bacterial sexually transmitted infections and were independently associated with increased HIV acquisition in multivariate analysis. Conclusions: Despite significant HIV inhibitory activity, cervicovaginal levels of alpha-defensins and LL-37 were associated with increased HIV acquisition, perhaps due to their association with bacterial sexually transmitted infections. |
| Databáze: | OpenAIRE |
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