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Anticancer research

Transduction of a novel HLA-DRB1*04:05-restricted, WT1-specific TCR gene into human CD4+ T cells confers killing activity against human leukemia cells.


PMID 25750272

Abstract

Wilms' tumor gene 1 (WT1) product is a pan-tumor-associated antigen. We previously identified WT1 protein-derived promiscuous helper peptide, WT1332. Therefore, isolation and characterization of the WT1332-specific T-cell receptors (TCRs) are useful to develop broadly applicable TCR gene-based adoptive immunotherapy. A novel HLA-DRB1*04:05-restricted WT1332-specific TCR gene was cloned and transduced into human CD4+ T-cells by using a lentiviral vector. The WT1332-specific TCR-transduced CD4+ T-cells showed strong proliferation and Th1-cytokine production in an HLA-DRB1*04:05-restricted, WT1332-specific manner. Furthermore, the WT1332-specific TCR-transduced CD4+ T-cells could lyse HLA-DRB1*04:05-positive, WT1-expressing leukemia cells in vitro. The novel TCR gene cloned here should be a promising tool to develop adoptive immunotherapy of WT1332-specific TCR-transduced CD4+ T-cells for the treatment of WT1-expressing cancer, such as leukemia.