title: Induction of interleukin-10 by HIV antigens in peripheral mononuclear cells of health care workers after occupational exposure to HIV-1-positive blood.
abstract: Evaluation of HIV-induced IL-2 production by peripheral blood mononuclear cells (PBMC) and HIV-specific T helper and cytotoxic T lymphocyte (CTL) responses in health care workers (HCW) occupationally exposed to HIV reveals a high rate of response to HIV among non-seroconverters. IL-10 is also known to interfere with HIV infection in vitro. To evaluate the induction of IL-10 by HIV antigens in HCW occupationally exposed to HIV, 18 HCW with percutaneous injury were enrolled in this study, 9 of them exposed to HIV-contaminated blood, and 9 exposed to HIV-negative blood. PBMC were incubated on plates coated with HIV-1 antigens, and IL-10 was measured in supernatants by ELISA. Five of nine HCW exposed to HIV-contaminated blood presented HIV-induced IL-10. Two of nine HCW exposed to HIV-negative source patients also had detectable levels of HIV-induced IL-10, one of them in the sample obtained on the day of accidental exposure. There was a relationship between the type of device involved in injury and IL-10 production. Individuals exposed to hollow needles or scalpels presented HIV-induced IL-10, whereas those exposed to solid needles and to digital puncture did not, suggesting a relationship between infectious load and IL-10. Although occupational exposure to HIV leads to a low rate of seroconversion, these individuals can develop an antigen-specific immune response characterized in our study by induction of IL-10 in PBMC in vitro.
authors.affiliation: Disciplina de Doenças Infecciosas e Parasitárias, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil.
authors.forename: D S S
authors.initials: DS
authors.lastname: Rodrigues
authors.forename: M K C
authors.initials: MK
authors.lastname: Brunialti
authors.forename: E A S
authors.initials: EA
authors.lastname: Medeiros
authors.forename: R S
authors.initials: RS
authors.lastname: Diaz
authors.forename: G
authors.initials: G
authors.lastname: Turcato
authors.forename: R
authors.initials: R
authors.lastname: Salomao
mesh_terms: D000062:Accidents, Occupational; D015488:HIV Antigens / Q000276:immunology*; D015658:HIV Infections / Q000276:immunology / Q000635:transmission; D018023:HIV Seronegativity / Q000276:immunology; D006679:HIV Seropositivity / Q000276:immunology; D015497:HIV-1 / Q000276:immunology*; D006282:Health Personnel; D006801:Humans; D017758:Infectious Disease Transmission, Patient-to-Professional; D016753:Interleukin-10 / Q000032:analysis / Q000096:biosynthesis*; D007963:Leukocytes, Mononuclear / Q000737:chemistry / Q000378:metabolism*; D016602:Needlestick Injuries / Q000276:immunology; D016273:Occupational Exposure
chemical_list: D015488:HIV Antigens; D016753:Interleukin-10