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Circulating Tumor Cell Lines: an Innovative Tool for Fundamental and Translational Research
Published on: December 25, 2021
VSV-tumor selective replication and protein translation
1Department of Microbiology and Immunology, Sylvester Comprehensive Cancer Center, University of Miami School of Medicine, FL 33136, USA. gbarber@med.miami.edu
Abstract:
The emergence of vesicular stomatatis virus (VSV) as a potent antitumor agent has made a dissection of the molecular determinants of host-cell permissiveness to this virus an important objective. Such insight would not only enable the intelligent design of future generations of recombinant VSV vectors to combat disease, but may also resolve general features of cellular transformation that may be exploited by this virus, and perhaps other oncolytic viruses. The defective pathways underlining the oncolytic activity of VSV remain to be fully determined but recent data indicates that flaws in innate immune responses, involving the interferon (IFN) system, may commonly occur in tumor cells and thus play a large role in facilitating oncolysis. Aside from the IFN system, however, it is almost certain that other key cellular pathways may be similarly defective and therefore cooperatively contribute towards mediating rapid oncolytic virus activity. Recent data have indicated that defects in cancer cell translational regulation could be one area that may be exploited by VSV. Certainly, all viruses require cellular protein synthesis pathways to facilitate their replication and many have devised numerous mechanisms to ensure that viral mRNAs become translated at the expense of the host. Using VSV as a model, this review will discuss some of the recent developments in the fields of innate immunity and translational regulation that may help explain mechanisms of viral oncolysis.
Insights
Vesicular stomatitis virus (VSV) shows promise as an antitumor agent. Understanding how cancer cells
Area of Science:
- Oncolytic virotherapy
- Molecular virology
- Cancer biology
Background:
- Vesicular stomatitis virus (VSV) is emerging as a potent antitumor agent.
- Understanding host-cell permissiveness to VSV is crucial for developing effective oncolytic virus therapies.
- Tumor cells often exhibit defects in innate immune responses, particularly the interferon (IFN) system, which can facilitate oncolysis.
Purpose of the Study:
- To dissect the molecular determinants of host-cell permissiveness to VSV.
- To explore how defects in cellular pathways, such as innate immunity and translational regulation, contribute to VSV's oncolytic activity.
- To inform the design of next-generation recombinant VSV vectors for disease treatment.
Main Methods:
- Review of recent developments in innate immunity research.
- Analysis of studies on cancer cell translational regulation.
- Utilizing VSV as a model system to investigate viral oncolysis mechanisms.
Main Results:
- Flaws in the interferon (IFN) system are implicated in tumor cell permissiveness to VSV.
- Defects in cancer cell translational regulation may be exploited by VSV for replication.
- Multiple defective cellular pathways likely cooperate to mediate rapid oncolytic virus activity.
Conclusions:
- Innate immunity defects, especially in the IFN system, play a significant role in VSV-mediated oncolysis.
- Dysregulation of translational control in cancer cells presents a vulnerability that VSV can exploit.
- Further research into these cellular mechanisms will enhance the development of VSV-based cancer therapies.
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