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Updated: Jun 21, 2026

Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
The case of oncolytic viruses versus the immune system: waiting on the judgment of Solomon
Robin J Prestwich1, Fiona Errington, Rosa M Diaz
1Leeds Institute of Molecular Medicine, University of Leeds, Leeds LS9 7TF, United Kingdom.
Abstract:
The three-way interaction between oncolytic viruses, the tumor microenvironment, and the immune system is critical to the outcome of antitumor therapy. Classically, the immune system is thought to limit the efficacy of therapy, leading to viral clearance. However, preclinical and clinical data suggest that in some cases virotherapy may in fact act as cancer immunotherapy. In this review we discuss the ability of oncolytic viruses to alter the immunogenic milieu of the tumor microenvironment, and the role of innate and adaptive immunity in both restricting and augmenting therapy. Strategies to improve virotherapy by immunomodulation, including suppression or enhancement of the innate and adaptive responses, are discussed.
Insights
Oncolytic viruses can enhance cancer immunotherapy by reprogramming the tumor microenvironment. Understanding the interplay between viruses, tumors, and immunity is key to improving virotherapy outcomes.
Area of Science:
- Immunology
- Virology
- Oncology
Background:
- The interaction between oncolytic viruses, tumor microenvironment, and immune system is crucial for cancer therapy.
- Traditionally, the immune system is viewed as a barrier to oncolytic virus efficacy, causing viral clearance.
Purpose of the Study:
- To review how oncolytic viruses can modulate the tumor microenvironment's immunogenicity.
- To explore the dual role of innate and adaptive immunity in restricting or enhancing virotherapy.
- To discuss immunomodulatory strategies for improving oncolytic virus therapy.
Main Methods:
- Review of preclinical and clinical data on oncolytic virus therapy.
- Analysis of the impact of oncolytic viruses on tumor immunology.
- Discussion of immune system's role in virotherapy.
Main Results:
- Virotherapy can function as cancer immunotherapy by altering the tumor microenvironment.
- Immune responses can both limit and potentiate the effects of oncolytic viruses.
- Oncolytic viruses have the capacity to modify the tumor's immunogenic profile.
Conclusions:
- The immune system's interaction with oncolytic viruses is complex, offering therapeutic opportunities.
- Targeting immune responses through immunomodulation can enhance the efficacy of oncolytic virus cancer therapy.
- Further research into immune-mediated mechanisms is vital for optimizing virotherapy.
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