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Updated: Feb 14, 2026
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Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
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Targeted BiTE Expression by an Oncolytic Vector Augments Therapeutic Efficacy Against Solid Tumors
Tobias Speck1,2, Johannes P W Heidbuechel1,2, Rūta Veinalde1
1Department of Translational Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany.
Summary
Oncolytic measles viruses encoding bispecific T-cell engagers (MV-BiTEs) show promise for treating solid tumors. This novel immunotherapy approach demonstrated efficacy and safety in preclinical models, offering a new strategy for cancer treatment.
Area of Science:
- Oncolytic virotherapy
- Immunotherapy
- Cancer research
Background:
- Bispecific T-cell engagers (BiTEs) are effective against blood cancers but limited against solid tumors.
- Oncolytic viruses can induce anti-tumor immunity and directly kill cancer cells.
Purpose of the Study:
- To investigate oncolytic measles viruses encoding bispecific T-cell engagers (MV-BiTEs) as a treatment for solid tumors.
- To assess the safety and efficacy of MV-BiTEs through local BiTE expression, tumor cell lysis, and in situ tumor vaccination.
Main Methods:
- Generated MV-BiTEs from the Edmonston B vaccine strain targeting model antigens.
- Assessed viral replication, oncolysis, and BiTE functionality in vitro.
- Evaluated in vivo efficacy in syngeneic and xenograft mouse models of solid cancers.
Main Results:
- MV-BiTE-infected cells secreted functional BiTE antibodies.
- Demonstrated therapeutic efficacy of MV-BiTE against established solid tumors in immunocompetent mice.
- Observed increased intratumoral T-cell infiltration and induced protective antitumor immunity.
Conclusions:
- MV-BiTE treatment was effective in two distinct solid tumor models without toxicity.
- Provides proof of concept for tumor-targeted BiTE expression by oncolytic measles virus.
- Represents a promising strategy for treating solid tumors with bispecific T-cell engagers.
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