J Cancer 2018; 9(23):4391-4397. doi:10.7150/jca.26437 This issue
1. Department of Urinary Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221000, China.
2. Radiotherapy Department, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221000, China.
Purpose: Oncolytic adenoviruses emerge as new agents for cancer therapy. This study aimed to investigate the synergistic anti-tumor activity of oncolytic adenovirus armed with IL-24 (ZD55-IL-24) and docetaxel (DTX) on advanced prostate cancer in vitro and in vivo.
Methods: DU145 prostate cancer cells or nude mice xenografted with DU145 prostate cancer cells were treated by ZD55-IL-24 and DTX alone or in combination.
Results: DTX did not affect ZD55-IL-24 replication and IL-24 expression in DU145 cells. In vitro, the combination of ZD55-IL-24 and DTX showed synergistic inhibitory effects on prostate cancer cell viability and invasion. In vivo, ZD55-IL-24 and DTX synergistically inhibited the growth and activated the apoptosis of DU145 xenografts, accompanied by significantly decreased PARP-1 levels and increased caspase-3 and caspase-8 levels as well as decreased CD31 expression.
Conclusion: We reported the synergistic anti-tumor efficacy of ZD55-IL-24 and DTX on prostate cancer. Our results suggest that chemotherapy combined with oncolytic adenovirus mediated gene therapy is a promising strategy for the treatment of advanced prostate cancer.
Keywords: docetaxel, prostate cancer, IL-24, Oncolytic adenovirus