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Generating De Novo Antigen-specific Human T Cell Receptors by Retroviral Transduction of Centric Hemichain
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Published on: October 25, 2016

The development and functions of CD4(+) T cells expressing a transgenic TCR specific for an MHC-I-restricted tumor

Xue Han1, Peiying Ye, Liqun Luo

  • 1Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China,

Cellular & Molecular Immunology
|June 7, 2011
PubMed

It has been reported that the ratio of CD4(+) to CD8(+) T cells has no bias in a few class I major histocompatibility complex (MHC-I)-restricted T-cell receptor (TCR)-transgenic mice specific for alloantigens or autoantigens, in which most CD4(+) T cells express an MHC-I-restricted TCR. In this study, we further showed that more than 50% of CD4(+) T cells in MHC-I-restricted P1A tumor antigen-specific TCR (P1ATCR)-transgenic mice could specifically bind to MHC-I/P1A peptide complex. P1A peptide could stimulate the transgenic CD4(+) T cells to proliferate and secrete both type 1 helper T cell and type 2 helper T cell cytokines. The activated CD4(+) T cells also showed cytotoxicity against P1A-expressing tumor cells. The analysis of TCR α-chains showed that these CD4(+) T cells were selected by co-expressing endogenous TCRs. Our results show that CD4(+) T cells from P1ATCR transgenic mice co-expressed an MHC-I-restricted transgenic TCR and another rearranged endogenous TCRs, both of which were functional.

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