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Efficient retroviral vector targeting of carcinoembryonic antigen-positive tumors

Chowdhury, S; Chester, KA; Bridgewater, J; Collins, MK; Martin, F; (2004) Efficient retroviral vector targeting of carcinoembryonic antigen-positive tumors. MOL THER , 9 (1) 85 - 92. 10.1016/j.ymthe.2003.10.004.

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Abstract

Many gene therapy approaches require specific, efficient gene delivery to cells in vivo. To target colorectal tumors we fused a single-chain variable fragment (scFv) directed against carcinoembryonic antigen (CEA) to the amphotropic murine leukemia virus envelope. A proline-rich hinge and matrix metalloprotease (MMP) cleavage site linked the two proteins. Following attachment to CEA, MMP cleavage of the envelope at the cell surface removed the scFv and proline-rich hinge, allowing transduction. This allowed selective targeting of CEA-positive cells in vivo after injection of producer cells at the site of the tumor, with up to 10% of cells within a CEA-positive tumor xenograft becoming transduced. Intraperitoneal injection of amphotropic producer cells resulted in transduction of cells in spleen, liver, and kidney, which was not detected when CEA-targeted producer cells were used. These results demonstrate the feasibility of using targeted retroviral vectors for in vivo gene delivery to tumors. Furthermore, the lack of transduction of host cells eliminates the risk of insertional mutagenesis leading to transformation of host hematopoietic cells.

Type: Article
Title: Efficient retroviral vector targeting of carcinoembryonic antigen-positive tumors
DOI: 10.1016/j.ymthe.2003.10.004
Keywords: retroviral vector, tumor targeting, CEA, MURINE LEUKEMIA-VIRUS, GENE DELIVERY, MATRIX METALLOPROTEINASES, CELLS, RECEPTOR, ANTIBODY, CANCER, CEA, ENVELOPE, THERAPY
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Cancer Institute
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Cancer Institute > Research Department of Oncology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Infection and Immunity
URI: http://discovery.ucl.ac.uk/id/eprint/472
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