title: CD4+ cytolytic T cell clones that recognize polymorphism of HLA-DR beta 3 chains.
abstract: We have investigated HLA-DR beta 3-associated functional polymorphism using selected Epstein-Barr virus (EBV) specific human T cell clones and EBV-transformed B cell (EBV-B) lines. To study the relationship between T cell recognition and the gene products of the three alleles of the DR beta 3 locus, Dw24, 25 and 26 (these were previously called DRw52a, b and c, respectively), CD4+ cytolytic T cell clones (CD4+ CTL) were isolated by repeated stimulation of peripheral blood mononuclear cells (HLA A2 A24; B8 B27; DRw17, Dw24, DRw2) with autologous EBV-B. Clone no. 32 proliferated strongly in response to HLA-Dw24 EBV-B, but not to Dw25 or Dw26 EBV-B. Furthermore, clones no. 32 and no. 45 both lysed HLA-Dw24 EBV-B but not Dw25 or Dw26 EBV-B. In addition, cold target inhibition studies showed that the cytolytic activity of both clones was blocked by unlabelled HLA-Dw24 EBV-B, but not by Dw25 or Dw26 EBV-B. Clones no. 32 and no. 45, therefore, could distinguish between the three allelic products of DR beta 3 haplotypes.
authors.affiliation: Mount Sinai Hospital Research Institute, Toronto, Ontario, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Noguchi
authors.forename: N
authors.initials: N
authors.lastname: Hozumi
authors.forename: E
authors.initials: E
authors.lastname: Nisbet-Brown
mesh_terms: D000956:Antigens, Viral / Q000276:immunology; D015704:CD4 Antigens / Q000032:analysis*; D002455:Cell Division / Q000276:immunology; D002461:Cell Line, Transformed; D002999:Clone Cells / Q000166:cytology; D003429:Cross Reactions / Q000276:immunology; D003602:Cytotoxicity, Immunologic / Q000276:immunology; D015803:HLA-DR3 Antigen / Q000276:immunology*; D004854:Herpesvirus 4, Human / Q000276:immunology; D006801:Humans; D013602:T-Lymphocytes, Cytotoxic / Q000166:cytology / Q000276:immunology*
chemical_list: D000956:Antigens, Viral; D015704:CD4 Antigens; D015803:HLA-DR3 Antigen