Neural Stem Cells Improve the Delivery of Oncolytic Chimeric Orthopoxvirus in a Metastatic Ovarian Cancer Model

• Main Authors: Mohamed Hammad, Yvonne R. Cornejo, Jennifer Batalla-Covello, Asma Abdul Majid, Connor Burke, Zheng Liu, Yate-Ching Yuan, Min Li, Thanh H. Dellinger, Jianming Lu, Nanhai G. Chen, Yuman Fong, Karen S. Aboody, Rachael Mooney
• Format: Article
• Language: English
• Published: Elsevier 2020-09-01
• Series: Molecular Therapy: Oncolytics
• Subjects: oncolytic virotherapy; CF33; ovarian cancer; neural stem cells; cellular therapy; Cancer
• Online Access: http://www.sciencedirect.com/science/article/pii/S2372770520301066

Oncolytic virotherapy represents a promising approach for treating recurrent and/or drug-resistant ovarian cancer. However, its successful application in the clinic has been hampered by rapid immune-mediated clearance, which reduces viral delivery to the tumor. Patient-derived mesenchymal stem cells that home to tumors have been used as viral delivery tools, but variability associated with autologous cell isolations limits the clinical applicability of this approach. We previously developed an allogeneic, clonal neural stem cell (NSC) line (HB1.F3.CD21) that can be used to deliver viral cargo. Here, we demonstrate that this NSC line can improve the delivery of a thymidine kinase gene-deficient conditionally replication-competent orthopoxvirus, CF33, in a preclinical cisplatin-resistant peritoneal ovarian metastases model. Overall, our findings provide the basis for using off-the-shelf allogeneic cell-based delivery platforms for oncolytic viruses, thus providing a more efficient delivery alternative compared with the free virus administration approach.