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- W2015648872 abstract "Herpesvirus saimiri (HVS) has the capacity to incorporate large amounts of heterologous DNA and can infect many different human cell types. To develop its potential as a gene therapy vector, we cloned herpes simplex virus thymidine kinase (TK) gene into the HVS genome in the form of an enhanced green fluorescent protein (EGFP) fusion protein, using a cosmid-based approach. At multiplicity of infection=100 over 90% of human leukemic K562 and Jurkat cells were transduced with HVS/EGFP-TK. Conditions of no selective pressure expression were maintained at >92% per cell division. Expression of the EGFP-TK fusion protein rendered transfected leukaemic cells sensitive to cytotoxic treatment with the prodrugs ganciclovir (GCV) and (E)-5-(2-bromovinyl)-2′deoxyuridine (BVDU) at concentrations as low as 10 ng/ml. The viral vector was also screened against a panel of colorectal and pancreatic carcinoma cell lines. All cell lines were transduced but showed a range of sensitivity to infection. Three of the most easily transduced cell lines: Mia PaCa, HCT116 and SW948 transduced with HVS/EGFP-TK were effectively ablated by subsequent treatment with GCV or BVDU. Our results show that in its current form HVS/EGFP-TK could be utilized as an antitumour agent, or it could be developed further by inclusion of a therapeutic gene, with TK presence ensuring a mechanism of controlled removal of modified cells when no longer necessary. These results suggest that HVS/EGFP-TK has a great potential for a number of gene therapy applications." @default.
- W2015648872 created "2016-06-24" @default.
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- W2015648872 date "2004-07-09" @default.
- W2015648872 modified "2023-10-09" @default.
- W2015648872 title "Functional expression of thymidine kinase in human leukaemic and colorectal cells, delivered as EGFP fusion protein by herpesvirus saimiri-based vector" @default.
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- W2015648872 doi "https://doi.org/10.1038/sj.cgt.7700729" @default.
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