title: Expression of perforin on HIV-1-specific CD8+ lymphocytes after immunization with a gp120-depleted, whole-killed HIV-1 immunogen.
abstract: We examined HIV-1 antigen specific intracellular expression of perforin on CD4+ and CD8+ lymphocytes in subjects with chronic HIV-1 infection on antiviral drug therapy after immunization with a gp120-depleted, whole killed HIV-1 immunogen (inactivated, gp120-depleted HIV-1 in IFA, REMUNE). Based upon previous results, we hypothesized that the restoration of adequate T helper immune responses by vaccination against HIV-1 could result in the augmentation of CD8+ lymphocyte immune responses measured as perforin expression. In the current study we observed an increase in the frequency of perforin in CD8+ lymphocytes in HIV infected individuals immunized with a gp120-depleted HIV-1 immunogen while on antiviral drug therapy. Furthermore, the frequency of HIV-specific CD8+ perforin expressing cells correlated with the T helper immune response as measured by the lymphocyte proliferative response (LPR). The induction of such responses with immunization may have direct antiviral consequences and is being studied in ongoing clinical trials.
authors: The Immune Response Corporation, Carlsbad, CA, USA. shotdoc@imnr.com
authors: R B
authors: RB
authors: Moss
authors: W K
authors: WK
authors: Giermakowska
authors: M R
authors: MR
authors: Wallace
authors: F C
authors: FC
authors: Jensen
authors: R Z
authors: RZ
authors: Maigetter
authors: D J
authors: DJ
authors: Carlo
mesh_terms: D016915:AIDS Vaccines / Q000276:immunology*; D019380:Anti-HIV Agents / Q000627:therapeutic use; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D005434:Flow Cytometry; D006679:HIV Seropositivity / Q000188:drug therapy / Q000276:immunology*; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D008562:Membrane Glycoproteins / Q000302:isolation & purification*; D054353:Perforin; D052899:Pore Forming Cytotoxic Proteins; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D014611:Vaccination
chemical_list: D016915:AIDS Vaccines; D019380:Anti-HIV Agents; C098825:HIV-1 immunogen, incomplete Freund's adjuvant; D008562:Membrane Glycoproteins; D052899:Pore Forming Cytotoxic Proteins; D054353:Perforin