BACKGROUND: Designer T cells are T lymphocytes engineered toward specific antibody-type membrane antigens through chimeric immunoglobulin-T-cell receptor (IgTCR) genes that have been used for adoptive cellular immunotherapy. We have extended this approach to prostate specific membrane antigen (PSMA) as a means to attack prostate cancer. METHODS: A chimeric anti-PSMA IgTCR gene was constructed based on an anti-PSMA monoclonal antibody, 3D8. Both T-cell lines and primary cultured human T lymphocytes were transduced with the chimeric anti-PSMA IgTCR construct and were analyzed for IgTCR expression, specific activation by PSMA, cytotoxicity against PSMA-expressing tumor cells in vitro, and retardation of tumor growth in an animal model. RESULTS: The IgTCR was incorporated into the TCR-CD3 complex and formed a functional chimeric complex. The IgTCR-modified T cells were specifically activated through the chimeric receptor with PSMA as measured by IL-2 production and increased CD25 expression and specifically lysed the PSMA-expressing prostate cancer cells in vitro as well as retarded tumor growth in an animal model. CONCLUSIONS: The anti-PSMA designer T cells exhibit an antibody-type specificity that can recognize PSMA expressing tumor cells in a MHC-independent fashion, resulting in T-cell activation, target cell lysis in vitro and inhibition of tumor growth in vivo. Copyright 2004 Wiley-Liss, Inc.
BACKGROUND: Designer T cells are T lymphocytes engineered toward specific antibody-type membrane antigens through chimeric immunoglobulin-T-cell receptor (IgTCR) genes that have been used for adoptive cellular immunotherapy. We have extended this approach to prostate specific membrane antigen (PSMA) as a means to attack prostate cancer. METHODS: A chimeric anti-PSMA IgTCR gene was constructed based on an anti-PSMA monoclonal antibody, 3D8. Both T-cell lines and primary cultured human T lymphocytes were transduced with the chimeric anti-PSMA IgTCR construct and were analyzed for IgTCR expression, specific activation by PSMA, cytotoxicity against PSMA-expressing tumor cells in vitro, and retardation of tumor growth in an animal model. RESULTS: The IgTCR was incorporated into the TCR-CD3 complex and formed a functional chimeric complex. The IgTCR-modified T cells were specifically activated through the chimeric receptor with PSMA as measured by IL-2 production and increased CD25 expression and specifically lysed the PSMA-expressing prostate cancer cells in vitro as well as retarded tumor growth in an animal model. CONCLUSIONS: The anti-PSMA designer T cells exhibit an antibody-type specificity that can recognize PSMA expressing tumor cells in a MHC-independent fashion, resulting in T-cell activation, target cell lysis in vitro and inhibition of tumor growth in vivo. Copyright 2004 Wiley-Liss, Inc.
Authors: Jennifer A Westwood; Mark J Smyth; Michele W L Teng; Maria Moeller; Joseph A Trapani; Andrew M Scott; Fiona E Smyth; Glenn A Cartwright; Barbara E Power; Dirk Hönemann; H Miles Prince; Phillip K Darcy; Michael H Kershaw Journal: Proc Natl Acad Sci U S A Date: 2005-12-19 Impact factor: 11.205
Authors: Michael H Kershaw; Jennifer A Westwood; Linda L Parker; Gang Wang; Zelig Eshhar; Sharon A Mavroukakis; Donald E White; John R Wunderlich; Silvana Canevari; Linda Rogers-Freezer; Clara C Chen; James C Yang; Steven A Rosenberg; Patrick Hwu Journal: Clin Cancer Res Date: 2006-10-15 Impact factor: 12.531