title: Genetic control of hapten-reactive helper T-cell responses and its implications for the generation of augmented antitumor cytotoxic responses.
abstract: The genetic control of hapten-reactive helper T-cell activity involved in cytotoxic T-lymphocyte (CTL) responses and its implications for augmenting tumor-specific immunity were studied. C57BL/6N mice were immunized to trinitrophenyl (TNP) or N-iodoacetyl-N'-(5-sulfonic l-naphthyl)ethylenediamine (AED) hapten by inoculation of hapten-modified syngeneic spleen cells. Spleen cells from these hapten-immunized mice were tested for hapten-reactive helper T-cell activity for generation of CTL. TNP-primed spleen cells resulted in only marginal help for the generation of anti-TNP-modified syngeneic spleen cell (TNP-self) CTL response when cocultured with normal C57BL/6N spleen cells (responding cells) in the presence of TNP-self. In contrast, AED-primed spleen cells exhibited appreciable help for AED-induced CTL responses. Furthermore, AED-helper, but not TNP-helper, T-cell activity was demonstrated to augment the generation of antitumor (RBL-5 leukemia) CTL responses from normal syngeneic spleen cells when stimulated with the corresponding hapten-self plus RBL-5 tumor cells. These results indicate that the successful augmentation of syngeneic tumor immunity through T-T-cell interaction with the use of hapten-reactive helper T-cells can depend on selection of the appropriate haptenic reagent in an individual expressing a given major histocompatibility haplotype.
authors.forename: Y
authors.initials: Y
authors.lastname: Mizushima
authors.forename: H
authors.initials: H
authors.lastname: Fujiwara
authors.forename: Y
authors.initials: Y
authors.lastname: Takai
authors.forename: G M
authors.initials: GM
authors.lastname: Shearer
authors.forename: T
authors.initials: T
authors.lastname: Hamaoka
mesh_terms: D000818:Animals; D003602:Cytotoxicity, Immunologic; D005260:Female; D006241:Haptens / Q000276:immunology*; D007938:Leukemia / Q000235:genetics / Q000276:immunology* / Q000473:pathology; D051379:Mice; D008810:Mice, Inbred C57BL; D009282:Naphthalenesulfonates / Q000276:immunology; D013154:Spleen / Q000166:cytology / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D006241:Haptens; D009282:Naphthalenesulfonates; D014301:Trinitrobenzenes; C006421:1,5-I-AEDANS