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A non-replicating recombinant adenovirus type 5 (Ad5)-vector encoding the gene for interferon alpha-2b (IFNα2b) and the gene transfer enhancement agent Syn 3, with potential antineoplastic activity. Upon intravesical administration, recombinant adenovirus-interferon with Syn3 transfects both cancerous and normal bladder cells, and the adenovirus secretes interferon (IFNα2b) into the bladder. IFN exerts a direct antitumor killing effect and a bystander effect, thereby killing adjacent, non-transfected cancerous bladder cells. Syn 3 enhances the ability of the adenoviral vector to transfect cells. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C104743\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C104743\' NCI Thesaurus)
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