Tumor gene therapy by MVA-mediated expression of T-cell-stimulating antibodies
Cancer Gene Therapy, ISSN: 0929-1903, Vol: 9, Issue: 5, Page: 470-477
2002
- 21Citations
- 10Captures
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Metrics Details
- Citations21
- Citation Indexes20
- 20
- CrossRef15
- Patent Family Citations1
- Patent Families1
- Captures10
- Readers10
- 10
Article Description
Immune responses to tumor-associated antigens are often dampened by a tumor-induced state of immune anergy. Previous work has attempted to overcome tumor-induced T-cell anergy by the direct injection of vectors carrying the genes encoding one of a variety of cytokines. We hypothesised that the polyclonal stimulation of T cells, preferably through the TCR complex, would result in a cascade of cytokines associated with T-cell activation and would be best able to overcome T-cell anergy. Here we use the highly attenuated MVA poxvirus to express on tumor cells, in vitro and in vivo, either of three membrane-bound monoclonal antibodies specific for murine TCR complex. Using this system, we have expressed antibodies specific for the CD3ε chain (KT3), TCRα/β complex (H57-597), and Vβ7 chain (TR310). Tumor cells bristling with these antibodies are capable of inducing murine T-cell proliferation and cytokine production. When injected into growing tumors (P815, RenCa, and B16F10), these constructs induce the activation of immune effector cells and result in the rejection of the tumor. Histological and FACS analysis of tumor-infiltrating leukocytes reveal that the injection of recombinant virus-expressing antibodies specific for the TCR complex attracts and activates (CD25, CD69) CD4 and CD8 lymphocytes. This approach represents a novel strategy to overcome T-cell anergy in tumors and allow the stimulation of tumor-specific T cells.
Bibliographic Details
Springer Science and Business Media LLC
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