Anticancer Activity of Oncolytic Adenovirus Vector Armed with IFN-alpha and ADP is Enhanced by Pharmacologically Controlled Expression of TRAIL
Overview
Oncology
Pharmacology
Affiliations
We have previously described oncolytic adenovirus (Ad) vectors KD3 and KD3-interferon (IFN) that were rendered cancer-specific by mutations in the E1A region of Ad; these mutations abolish binding of E1A proteins to p300/CBP and pRB. The antitumor activity of the vectors was enhanced by overexpression of the Adenovirus Death Protein (ADP, E3-11.6K) and by replication-linked expression of IFN-alpha. We hypothesized that the anticancer efficacy of the KD3-IFN vector could be further improved by expression of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL). E1-deleted Ad vectors were constructed carrying reporter genes for enhanced green fluorescent protein or secreted placental alkaline phosphatase (SEAP) and a therapeutic gene for TRAIL under control of the TetON system. Expression of the genes was increased in the presence of a helper virus and the inducer doxycycline such that up to 231-fold activation of expression for the TetON-SEAP vector was obtained. Coinfection with TetON-TRAIL augmented oncolytic activity of KD3 and KD3-IFN in vitro. Induction of TRAIL expression did not reduce the yield of progeny virus. Combination of TetON-TRAIL and KD3-IFN produced superior antitumor activity in vivo as compared with either vector alone demonstrating the efficacy of a four-pronged cancer gene therapy approach, which includes Ad oncolysis, ADP overexpression, IFN-alpha-mediated immunotherapy, and pharmacologically controlled TRAIL activity.
Role of Gene Therapy in Pancreatic Cancer-A Review.
Sato-Dahlman M, Wirth K, Yamamoto M Cancers (Basel). 2018; 10(4).
PMID: 29614005 PMC: 5923358. DOI: 10.3390/cancers10040103.
Sato-Dahlman M, Yamamoto M Curr Cancer Drug Targets. 2017; 18(2):153-161.
PMID: 28228084 PMC: 6186423. DOI: 10.2174/1568009617666170222123925.
Oncolytic virus therapy for cancer.
Goldufsky J, Sivendran S, Harcharik S, Pan M, Bernardo S, Stern R Oncolytic Virother. 2016; 2:31-46.
PMID: 27512656 PMC: 4918352. DOI: 10.2147/OV.S38901.
LaRocca C, Han J, Gavrikova T, Armstrong L, Oliveira A, Shanley R Surgery. 2015; 157(5):888-98.
PMID: 25731784 PMC: 4417428. DOI: 10.1016/j.surg.2015.01.006.
Inducible gene expression in tumors colonized by modified oncolytic vaccinia virus strains.
Stritzker J, Huppertz S, Zhang Q, Geissinger U, Hartl B, Gentschev I J Virol. 2014; 88(19):11556-67.
PMID: 25056902 PMC: 4178832. DOI: 10.1128/JVI.00681-14.