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- W2038465786 abstract "Replication-conditional viruses destroy tumors in a process referred to as viral oncolysis. An important prerequisite for this cancer therapy strategy is use of viruses that replicate preferentially in neoplastic cells. In this study the DF3/MUC1 promoter/enhancer sequence is used to regulate expression of gamma(1)34.5 to drive replication of a Herpes simplex virus 1 (HSV-1) mutant (DF3gamma34.5) preferentially in DF3/MUC1-positive cells. HSV-1 gamma(1)34.5 functions to dephosphorylate elongation initiation factor 2alpha, which is an important step for robust HSV-1 replication. After DF3gamma34.5 infection of cells, elongation initiation factor 2alpha phosphatase activity and viral replication were observed preferentially in DF3/MUC1-positive cells but not in DF3/MUC1-negative cells. Regulation of gamma(1)34.5 function results in preferential replication in cancer cells that express DF3/MUC1, restricted biodistribution in vivo, and less toxicity as assessed by LD(50). Preferential replication of DF3gamma34.5 was observed in DF3/MUC1-positive liver tumors after intravascular perfusion of human liver specimens. DF3gamma34.5 was effective against carcinoma xenografts in nude mice. Regulation of gamma(1)34.5 by the DF3/MUC1 promoter is a promising strategy for development of HSV-1 mutants for viral oncolysis." @default.
- W2038465786 created "2016-06-24" @default.
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- W2038465786 date "2004-04-01" @default.
- W2038465786 modified "2023-09-26" @default.
- W2038465786 title "Selectivity of an Oncolytic Herpes Simplex Virus for Cells Expressing the DF3/MUC1 Antigen" @default.
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- W2038465786 doi "https://doi.org/10.1158/0008-5472.can-03-3431" @default.
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