title: Comparative immunogenicity in rhesus monkeys of multi-protein HIV-1 (CRF02_AG) DNA/MVA vaccines expressing mature and immature VLPs.
abstract: We developed an AIDS vaccine for Western and West-Central Africa founded on HIV-1 subtype CRF02_AG. Rhesus macaques were primed with Gag-Pol-Env-expressing plasmid DNA and boosted with a recombinant modified vaccinia virus Ankara (rMVA), expressing matched proteins. Two DNA vaccine constructs (IC1-90 and IC48) that differed by point mutations in gag and pol were compared. IC1-90 produces primarily immature (core comprises unprocessed Pr55Gag) HIV-like particles (VLPs) and IC48 produces mature VLP with processed Pr55Gag, immature VLP, and intracellular protein aggregates. Both vaccines raised significant cellular responses for Gag, Pol, and Env. Approximate twofold higher ELISPOT responses to Gag and Env epitopes were observed for IC48 animals than for IC1-90 animals at the peak post-MVA effector (P = 0.028) and late memory (P = 0.051) phases, respectively. Greater breadth for IC48-primed animals was observed than for IC1-90-primed animals at peak response (P = 0.03). Our results indicated that the vaccines elicited high frequency T cell responses and primed anti-Env antibody. They also suggest that expression of different forms of VLP has a significant effect on elicited cellular and humoral immunity.
authors: Laboratory Branch, Centers for Disease Control and Prevention, Mail Stop G-19, Atlanta, GA 30333, USA. dellenberger@cdc.gov
authors: Dennis
authors: D
authors: Ellenberger
authors: Linda
authors: L
authors: Wyatt
authors: Bin
authors: B
authors: Li
authors: Suzan
authors: S
authors: Buge
authors: Nattawan
authors: N
authors: Lanier
authors: I Vanesssa
authors: IV
authors: Rodriguez
authors: Carlos A
authors: CA
authors: Sariol
authors: Melween
authors: M
authors: Martinez
authors: Michael
authors: M
authors: Monsour
authors: Jennifer
authors: J
authors: Vogt
authors: James
authors: J
authors: Smith
authors: Ronald
authors: R
authors: Otten
authors: David
authors: D
authors: Montefiori
authors: Edmundo
authors: E
authors: Kraiselburd
authors: Bernard
authors: B
authors: Moss
authors: Harriet
authors: H
authors: Robinson
authors: Janet
authors: J
authors: McNicholl
authors: Salvatore
authors: S
authors: Butera
mesh_terms: D016915:AIDS Vaccines; D000354:Africa, Western; D000818:Animals; D000917:Antibody Formation; D002460:Cell Line; D004797:Enzyme-Linked Immunosorbent Assay; D000939:Epitopes / Q000276:immunology; D015686:Gene Products, env / Q000276:immunology; D015683:Gene Products, gag / Q000276:immunology; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D007668:Kidney / Q000276:immunology / Q000821:virology; D008253:Macaca mulatta; D008297:Male; D010957:Plasmids; D013601:T-Lymphocytes / Q000276:immunology; D014162:Transfection; D019444:Vaccines, DNA
chemical_list: D016915:AIDS Vaccines; D000939:Epitopes; D015686:Gene Products, env; D015683:Gene Products, gag; D019444:Vaccines, DNA