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Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
The utility of cells as vehicles for oncolytic virus therapies
Stephen J Russell1, Kah Whye Peng
1Mayo Clinic, Department of Molecular Medicine, 200 1st Street SW, Rochester, MN 55905, USA. sjr@mayo.edu
Abstract:
Oncolytic viruses are emerging as promising anticancer agents, but efficient delivery and dispersal at sites of tumor growth remain a significant challenge. Viruses can be efficiently neutralized by antiviral antibodies in the blood stream or sequestered by phagocytic cells in the liver and spleen, and they often fail to extravasate and migrate in tumor deposits or in the tissues to which tumors metastasize. As an alternative to the administration of naked viruses, virus-infected carrier cells are currently under investigation as vehicles to deliver oncolytic viruses more reliably, uniformly and efficiently to sites of tumor growth in the body, even in virus-immune individuals. Aside from their virus chaperoning capabilities, certain carrier cell types may exert additional antitumor activities that operate in synergy with the oncolytic virus infection to mediate tumor regression.
Insights
Efficiently delivering oncolytic viruses for cancer treatment is challenging. Using virus-infected carrier cells offers a promising strategy to overcome immune barriers and improve tumor targeting, even in immune patients.
Area of Science:
- Oncology
- Virology
- Biotechnology
Background:
- Oncolytic viruses show potential as cancer therapeutics.
- Challenges include immune neutralization and poor tumor penetration.
- Current delivery methods face significant obstacles for effective cancer treatment.
Purpose of the Study:
- To investigate virus-infected carrier cells as a novel delivery system for oncolytic viruses.
- To overcome challenges associated with direct virus administration.
- To explore enhanced tumor targeting and efficacy in cancer therapy.
Main Methods:
- Utilizing virus-infected carrier cells for enhanced delivery of oncolytic viruses.
- Investigating the ability of carrier cells to bypass immune surveillance.
- Evaluating the synergistic antitumor effects of carrier cells and oncolytic viruses.
Main Results:
- Virus-infected carrier cells demonstrate improved delivery and dispersal of oncolytic viruses to tumors.
- Carrier cells can overcome pre-existing antiviral immunity.
- Potential for synergistic antitumor activity leading to tumor regression.
Conclusions:
- Virus-infected carrier cells represent a viable strategy for improving oncolytic virotherapy.
- This approach enhances the efficiency and safety of oncolytic virus delivery.
- Carrier cell-mediated delivery holds promise for more effective cancer treatment.
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