title: Comparison between env-specific T-cell epitopic responses in HIV-1-uninfected adults immunized with combination of ALVAC-HIV(vCP205) plus or minus rgp160MN/LAI-2 and HIV-1-infected adults.
abstract: In this study, we investigated the CD4 T-helper response induced by ALVAC-HIV(vCP205) +/- rgp160MN/LAI-2 using a series of 15 overlapping amino acid peptides spanning the entire gp160MN/LAI-2 antigen. CD4 Env-specific T-cell lines were established from three groups of HIV-1-negative HIV vaccine recipients: vCP205 + gp160MN/LAI-2, vCP205 only, and gp160MN/LAI-2 only. CD4 Env-specific T-cell lines established from individuals who received the prime-boost vCP205 + rgp160MN/LAI-2 generated strong and broad T-helper responses scattered across the Env sequence, whereas Env-specific T-cell lines from individuals receiving the vCP205 vaccine alone generated reactivity to only a few peptides. CD4 -specific T-cell lines were also established from HIV-1-infected individuals and demonstrated poor reactogenicity to Env peptides in both breadth and amplitude of response. These results highlight the complexity of major histocompatibility complex class II presentation and CD4 antigen-specific reactivity, emphasizing the need to better understand these crucial T-helper cell responses in the setting of HIV infection and HIV vaccine development.
authors.affiliation: Henry M Jackson Foundation, Rockville, Maryland, USA. silviak@hawaii.edu
authors.forename: Silvia
authors.initials: S
authors.lastname: Ratto-Kim
authors.forename: Lawrence D
authors.initials: LD
authors.lastname: Loomis-Price
authors.forename: Naomi
authors.initials: N
authors.lastname: Aronson
authors.forename: Janelle
authors.initials: J
authors.lastname: Grimes
authors.forename: Cristin
authors.initials: C
authors.lastname: Hill
authors.forename: Chevelle
authors.initials: C
authors.lastname: Williams
authors.forename: Raphaelle
authors.initials: R
authors.lastname: El Habib
authors.forename: Deborah L
authors.initials: DL
authors.lastname: Birx
authors.forename: Jerome H
authors.initials: JH
authors.lastname: Kim
mesh_terms: D016915:AIDS Vaccines / Q000276:immunology*; D000328:Adult; D000595:Amino Acid Sequence; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D002478:Cells, Cultured; D018604:Epitope Mapping; D018984:Epitopes, T-Lymphocyte / Q000737:chemistry / Q000276:immunology*; D015488:HIV Antigens / Q000737:chemistry / Q000276:immunology*; D019302:HIV Envelope Protein gp160 / Q000276:immunology*; D015658:HIV Infections / Q000276:immunology* / Q000821:virology; D006801:Humans; D008213:Lymphocyte Activation; D010446:Peptide Fragments / Q000737:chemistry / Q000276:immunology; D014611:Vaccination
chemical_list: D016915:AIDS Vaccines; D018984:Epitopes, T-Lymphocyte; D015488:HIV Antigens; D019302:HIV Envelope Protein gp160; D010446:Peptide Fragments