The development and functions of CD4(+) T cells expressing a transgenic TCR specific for an MHC-I-restricted tumor antigenic epitope.
Cell Mol Immunol
; 8(4): 333-40, 2011 Jul.
Article
in En
| MEDLINE
| ID: mdl-21643003
ABSTRACT
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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Receptors, Antigen, T-Cell
/
Histocompatibility Antigens Class I
/
CD4-Positive T-Lymphocytes
Limits:
Animals
Language:
En
Journal:
Cell Mol Immunol
Journal subject:
ALERGIA E IMUNOLOGIA
Year:
2011
Type:
Article
Affiliation country:
China