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- W2080862712 abstract "A conditionally replicative adenovirus is a novel anticancer agent designed to replicate selectively in tumor cells. However, a leak of the virus into systemic circulation from the tumors often causes ectopic infection of various organs. Therefore, suppression of naive viral tropism and addition of tumor-targeting potential are necessary to secure patient safety and increase the therapeutic effect of an oncolytic adenovirus in the clinical setting. We have recently developed a direct selection method of targeted vector from a random peptide library displayed on an adenoviral fiber knob to overcome the limitation that many cell type-specific ligands for targeted adenovirus vectors are not known. Here we examined whether the addition of a tumor-targeting ligand to a replication-competent adenovirus ablated for naive tropism enhances its therapeutic index. First, a peptide-display adenovirus library was screened on a pancreatic cancer cell line (AsPC-1), and particular peptide sequences were selected. The replication-competent adenovirus displaying the selected ligand (AdΔCAR-SYE) showed higher oncolytic potency in several other pancreatic caner cell lines as well as AsPC-1 compared with the untargeted adenovirus (AdΔCAR). An intratumoral injection of AdΔCAR-SYE significantly suppressed the growth of AsPC-1 subcutaneous tumors, and an analysis of adenovirus titer in the tumors revealed an effective replication of the virus in the tumors. Ectopic liver gene transduction following the intratumoral injection of AdΔCAR-SYE was not increased compared with the AdΔCAR. The results showed that a tumor-targeting strategy using an adenovirus library is promising for optimizing the safety and efficacy of oncolytic adenovirus therapy." @default.
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- W2080862712 date "2009-02-19" @default.
- W2080862712 modified "2023-10-12" @default.
- W2080862712 title "Oncolytic virus therapy for pancreatic cancer using the adenovirus library displaying random peptides on the fiber knob" @default.
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- W2080862712 doi "https://doi.org/10.1038/gt.2009.1" @default.
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