Abstract
Purpose
Oncolytic viruses (OVs) exert a high level of antitumor potency without causing harm to normal cells. Current oncolytic virotherapy is mainly limited to the intratumoral injection of viral particles, while systemic administration provides the opportunity to treat metastatic neoplasia as well as the primary tumor. Despite promising outcomes in preclinical studies, systemic administration of oncolytic viruses has shown little success in patients. Extracellular vesicles (EVs) are secreted by most mammalian cell types, both in pathologic and physiologic conditions and exert a wide range of biological functions in intercellular communication. Extracellular vesicles are also involved in viral infection, and it has been shown that viruses affect the generation and content of these particles. This review aimed to summarize the current knowledge of EV involvement in viral infection and discuss their potential as vehicles for systemic delivery of OVs.
Methods
The relationships between oncolytic viruses and EVs were studied by searching specific phrases like “systemic delivery of oncolytic viruses by extracellular vesicles” PubMed and Google Scholar databases.
Results
Numerous articles have suggested the role of extracellular vesicles in the spread of viruses, and several evidence demonstrated that these particles efficiently deliver the oncolytic viruses to the target sites through systemic infusion.
Conclusion
Due to the role of extracellular vesicles in the spread of viruses, they can be used as a tool for systemic delivery of oncolytic viruses.
Lay Summary
It has been established that oncolytic viruses (OVs) have a high level of antitumor potency without causing harm to normal cells. Despite promising outcomes in preclinical studies, systemic administration of OV has exert little success in patients due to the rapid clearance of the viruses, as a result of host immune response. It has been established that EVs are involved in viral infection, and it has been shown that viruses affect the generation and content of EVs. This review will summarize the current knowledge of EV involvement in viral infection and discuss their potential as vehicles for systemic delivery of OVs.
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Data Availability
Not applicable.
Abbreviations
- EVs:
-
Extracellular vesicles
- OVs:
-
Oncolytic viruses
- IV:
-
Intervascular
- IT:
-
Intratumoral
- EBV:
-
Epstein–Barr virus
- NDV:
-
Newcastle disease virus
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The authors would like to thank the Department of Tissue Engineering and Applied Cell Sciences, Shiraz University of Medical Sciences, for planning this project.
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BT suggested and described the idea. BT, ZZ-B, and AB wrote the different parts of the manuscript. ZZ-B drew the pictures, and F M.M edited the manuscript.
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Taheri, B., Zarei-Behjani, Z., Babaei, A. et al. Extracellular Vesicles: a Trojan Horse Delivery Method for Systemic Administration of Oncolytic Viruses. Regen. Eng. Transl. Med. 9, 447–457 (2023). https://doi.org/10.1007/s40883-023-00295-0
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DOI: https://doi.org/10.1007/s40883-023-00295-0