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Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
Viruses with deletions in antiapoptotic genes as potential oncolytic agents
1Molecular Neurosurgery Laboratory, Massachusetts General Hospital and Harvard Medical School, MA, USA. tachiangliu@yahoo.com
Abstract:
Replication-selective oncolytic viruses have emerged as a new treatment platform for cancers. However, selectivity and potency need to be improved before virotherapy can become a standard treatment modality. In addition, mechanisms that can be incorporated to enable targeting a broad range of cancer types are highly desirable. Cancer cells are well known to have multiple blocks in apoptosis pathways. On the other hand, viruses have evolved to express numerous antiapoptotic genes to antagonize apoptosis induced upon infection. Viruses with deletions in antiapoptotic genes can therefore be complemented by antiapoptotic genetic changes in cancer cells for efficient replication and oncolysis. In this review, we summarize the recent development of this concept, the potential obstacles, and future directions for optimization.
Insights
Replication-selective oncolytic viruses offer a promising cancer treatment. By leveraging cancer cells' apoptosis resistance, modified viruses can enhance efficacy for broader therapeutic applications.
Area of Science:
- Oncology
- Virology
- Biotechnology
Background:
- Oncolytic viruses are a novel cancer therapy, but require enhanced selectivity and potency.
- Cancer cells often possess apoptosis-resistant pathways.
- Viruses naturally express antiapoptotic genes to counteract host defenses.
Purpose of the Study:
- To review the development of oncolytic viruses engineered to exploit cancer cell apoptosis resistance.
- To discuss strategies for improving virotherapy targeting a wide range of cancers.
- To identify potential obstacles and future optimization directions.
Main Methods:
- Review of current research on replication-selective oncolytic viruses.
- Analysis of viral antiapoptotic gene functions and their interaction with cancer cell pathways.
- Examination of strategies for complementing viral deletions with cancer-specific genetic alterations.
Main Results:
- Oncolytic viruses with deletions in antiapoptotic genes can be complemented by cancer cells' inherent resistance to apoptosis.
- This complementary mechanism can lead to enhanced viral replication and cancer cell lysis (oncolysis).
- Targeting apoptosis pathways offers a route to broaden the applicability of virotherapy.
Conclusions:
- Exploiting the interplay between viral and cancer cell apoptosis pathways is a key strategy for improving oncolytic virotherapy.
- Further research is needed to overcome potential obstacles and optimize this therapeutic approach.
- This strategy holds promise for developing more effective and broadly applicable cancer treatments.
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