A CD4+ cytotoxic T-lymphocyte clone to a conserved epitope on human immunodeficiency virus type 1 p24: cytotoxic activity and secretion of interleukin-2 and interleukin-6.
A CD4+ cytotoxic T-lymphocyte (CTL) clone, established from the peripheral blood of a human immunodeficiency virus (HIV)-seropositive donor, lysed autologous target cells that were infected with a recombinant vaccinia virus containing the gag gene of HIV type 1 and target cells pulsed with p24gag construct expressed in Escherichia coli. The recognition of the HLA-DQ-restricted epitope by this clone was further defined by using overlapping synthetic peptides. The epitope recognized by this CD4+ CTL clone (amino acids 140 to 148) overlaps with a CD8+ epitope and is highly conserved among all isolates of HIV type 1 that have been sequenced. Production and secretion of lymphokines such as interleukin-2 and interleukin-6 after specific antigenic stimulation were demonstrated by this gag-specific CD4+ CTL clone.
Department of Medicine, University of Massachusetts Medical Center, Worcester 01655.
R A
RA
Littaua
M B
MB
Oldstone
A
A
Takeda
F A
FA
Ennis
D000595:Amino Acid Sequence; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism; D002999:Clone Cells; D000939:Epitopes / Q000276:immunology*; D016655:HIV Core Protein p24 / Q000737:chemistry / Q000276:immunology*; D006801:Humans; D007376:Interleukin-2 / Q000378:metabolism*; D015850:Interleukin-6 / Q000378:metabolism*; D008969:Molecular Sequence Data
D000939:Epitopes; D016655:HIV Core Protein p24; D007376:Interleukin-2; D015850:Interleukin-6