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The HLA-B27-restricted HIV gag cytotoxic T-lymphocyte (CTL) epitope, 265-279, is highly conserved amongst HIV-1 isolates, only one, HIV-1ELI, having a single amino acid substitution. Over the same region HIV-2 differs by five amino acids. As a broadly cross-protective AIDS vaccine should protect against infection from all isolates of HIV-1 and HIV-2, we tested CTL specific for the HIV-1 265-279 epitope with peptide analogues from HIV-1ELI, HIV-2 and two simian immunodeficiency virus (SIV) isolates, and with recombinant vaccinia viruses expressing the respective gag genes, to determine whether there was any cross-reactivity for this CTL epitope. CTL from the HIV-1-infected donor could recognize the HIV-1ELI peptide, the HIV-2 peptide and recombinant vaccinia virus-infected target and one of the two SIV peptide-treated targets. Epitopes that exhibit such cross-reactivity may be valuable in vaccine design.

Type

Journal article

Journal

AIDS

Publication Date

09/1990

Volume

4

Pages

841 - 845

Keywords

Amino Acid Sequence, Cross Reactions, Epitopes, Gene Products, gag, Genes, gag, HIV Antigens, HIV Seropositivity, HIV-1, HIV-2, Hemophilia A, Humans, Molecular Sequence Data, Simian Immunodeficiency Virus, T-Lymphocytes, Cytotoxic, Vaccinia virus