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- W1588896784 abstract "Abstract The present study was designed to investigate the generation of trinitrophenyl (TNP)-reactive helper T cell activity potent enough to induce the regression of a syngeneic tumor; this occurs by augmenting antitumor-specific immunity through T-T cell interaction. Mice whose skin was painted with trinitrochlorobenzene (TNCB) exhibited a variety of anti-TNP T cell responses, including delayed-type hypersensitivity (DTH) and cytotoxic T cell responses, as well as helper T cell activity. Pretreatment of C3H/He mice with TNP-conjugated copolymer of D-glutamic acid and lysine (TNP-D-GL) or cyclophosphamide, which have been shown, respectively, to inactivate TNP-specific suppressor T cells or suppressor T cells in general, exhibited a slight or marginal augmentation of DTH and cytotoxic potentials when tested 5 wk after TNCB painting. In contrast, the same pretreatment regimens induced an appreciably amplified generation of anti-TNP helper T cell activity. This amplified TNP-helper T cell activity was demonstrated to enhance cytotoxic responses to antigens other than TNP in an antigen-nonspecific way. In fact, such helper T cells enhanced antitumor CTL responses when co-cultured with spleen cells from syngeneic X5563 plasmacytoma-bearing mice in the presence of TNBS-modified X5563 tumor cells. This amplified TNP-helper cell system was utilized for its immunotherapeutic potential. When TNCB was injected into X5563 tumor mass of syngeneic C3H/He mice in which the amplified TNP-helper T cell activity had been generated, an appreciable number of growing tumors was observed to regress. This contrasted with the low incidence of tumor regression observed in mice in which TNP-helper activity had been induced by TNCB painting without inactivation of suppressors. Thus, the present model provides an effective immunotherapeutic manipulation for eliciting enhanced in vivo tumor regression, and emphasizes a role of helper T cells in augmentation of syngeneic tumor immunity." @default.
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- W1588896784 date "1984-03-01" @default.
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- W1588896784 title "Enhanced TNP-reactive helper T cell activity and its utilization in the induction of amplified tumor immunity that results in tumor regression." @default.
- W1588896784 doi "https://doi.org/10.4049/jimmunol.132.3.1571" @default.
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