Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/41386
- Potent oncolytic activity of human enteroviruses against human prostate cancer
Berry, Linda J.;
Au, Gough G.;
Barry, Richard D.;
Shafren, Darren R.
- The University of Newcastle. Faculty of Health, School of Biomedical Sciences and Pharmacy
- Background: Oncolytic virotherapy offers a unique treatment modality for prostate cancer, especially stages that are resistant to current therapies, with the additional benefit of preferentially targeting tumor cells amongst an environment of healthy tissue. Herein, the low pathogenic enteroviruses; Coxsackievirus A21 (CVA21), as well as a bio-selected variant of Coxsackievirus A21 (CV A21-DAFv) and Echovirus 1 (EV1) are evaluated as novel oncolytic agents against human prostate cancer. Methods: The surface expression of viral receptors required for enterovirus cell attachment/entry, including intercellular adhesion molecule-1 (ICAM-1), decay-accelerating factor (DAF) and integrin alpha₂beta₁ on a number of human prostate cancer lines was assessed by flow cytometry. Susceptibility to viral oncolysis was determined via in vitro cell lysis assays performed on cell monolayers cultured in micro titer plates. The in vivo oncolytic efficacy of the enteroviruses was assessed using xenograft models in immune compromized SCID-mice following systemic challenge. Results: The majority of prostate cancer lines tested expressed surface ICAM-1 and/or DAF, or alpha₂beta₁, facilitating significant degrees of oncolysis following in vitro viral challenge. Systemic delivery of each of the three viruses induced reduction of xenograft tumor burdens in vivo, and a therapeutic dose-response was demonstrated for escalating doses of EV1 in the LNCaP animal model. Conclusion: Enteroviruses CV A21, CV A21-DAFv, and EVI are potentially potent oncolytic agents against human prostate cancer.
- Prostate Vol. 68, Issue 6, p. 577-587
- Publisher Link
- John Wiley & Sons
- Resource Type
- journal article