PMID: 9558005Apr 29, 1998Paper

Contribution of the T cell receptor BJ gene to recognition of the P91A tumor antigen in DBA/2 mice

Cancer Immunology, Immunotherapy : CII
S SuzukiT Kato

Abstract

To understand specific immune responses against a tumor, it is important to characterize T cells that recognize the tumor antigen. The mouse P91A antigen is one of the well-defined tumor antigens that is expressed on the P911 cell line, and T cells responding to the antigen in DBA/2 mice were reported to be restricted to BV8S2/S3 families in their T cell receptor (TCR) BV gene usage. We have further characterized the P91A-responding T cells in DBA/2 mice, focusing on TCR BJ gene usage and using the polymerase chain reaction/enzyme-linked immunosorbent assay and DNA sequencing studies of their third complementarity-determining (CDR3) regions. As a result, T cells with cytotoxic activity to the P91A antigen, induced from murine spleen cells both in vivo and in vitro, showed predominant use of the BJ2S1 gene segment in both BV8S2 and BV8S3 T cells compared to unmanipulated murine spleen cells. Sequencing studies of the CDR3 regions in the BV8S3 T cells revealed clonal expansion of T cells with the BV8S3-BJ2S1 combination in two of three DBA/2 mice tested. In the remaining mouse, clonal expansion was not detected despite predominant use of the BJ2S1 segment by these T cells. These data suggest that P91A-recognizing T cells would pr...Continue Reading

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