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Updated: May 10, 2026
Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
Model-based rational design of an oncolytic virus with improved therapeutic potential
Fabrice Le Bœuf1, Cory Batenchuk, Markus Vähä-Koskela
1Center for Innovative Cancer Therapeutics, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada K1H 8L6.
Abstract:
Oncolytic viruses are complex biological agents that interact at multiple levels with both tumour and normal tissues. Antiviral pathways induced by interferon are known to have a critical role in determining tumour cell sensitivity and normal cell resistance to infection with oncolytic viruses. Here we pursue a synthetic biology approach to identify methods that enhance antitumour activity of oncolytic viruses through suppression of interferon signalling. On the basis of the mathematical analysis of multiple strategies, we hypothesize that a positive feedback loop, established by virus-mediated expression of a soluble interferon-binding decoy receptor, increases tumour cytotoxicity without compromising normal cells. Oncolytic rhabdoviruses engineered to express a secreted interferon antagonist have improved oncolytic potential in cellular cancer models, and display improved therapeutic potential in tumour-bearing mice. Our results demonstrate the potential of this methodology in evaluating potential caveats of viral immune-evasion strategies and improving the design oncolytic viruses.
Insights
Synthetic biology enhances oncolytic viruses by suppressing interferon signaling. Engineered viruses show increased tumor cell killing and improved therapeutic potential in mice.
Area of Science:
- Virology
- Immunology
- Synthetic Biology
Background:
- Oncolytic viruses are biological agents targeting tumors.
- Interferon signaling impacts tumor cell sensitivity and normal cell resistance to oncolytic viruses.
Purpose of the Study:
- To enhance antitumour activity of oncolytic viruses by suppressing interferon signaling.
- To identify methods for improving oncolytic virus design using synthetic biology.
Main Methods:
- Mathematical analysis of interferon signaling modulation strategies.
- Engineering oncolytic rhabdoviruses to express a secreted interferon antagonist.
- Evaluating enhanced oncolytic virus efficacy in cellular cancer models and tumor-bearing mice.
Main Results:
- Engineered oncolytic rhabdoviruses demonstrated improved oncolytic potential in vitro.
- The engineered viruses showed enhanced therapeutic potential in vivo in mouse models.
- Suppression of interferon signaling increased tumor cell cytotoxicity without harming normal cells.
Conclusions:
- A synthetic biology approach using a secreted interferon antagonist can enhance oncolytic virus efficacy.
- This strategy improves tumor cell killing while maintaining normal cell safety.
- The methodology aids in understanding viral immune evasion and designing better oncolytic viruses.
