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Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
Viruses as anticancer drugs
Stephen J Russell1, Kah-Whye Peng
1Molecular Medicine Program, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN 55905, USA. sjr@mayo.edu
Abstract:
Oncolytic viruses are being developed as anticancer drugs. They propagate selectively in tumor tissue and destroy it without causing excessive damage to normal non-cancerous tissues. When used as drugs, they must meet stringent criteria for safety and efficacy and be amenable to pharmacological study in human subjects. Specificity for neoplastic tissue is the key to safety, and this goal can be achieved through a variety of ingenious virus-engineering strategies. Antiviral immunity remains a significant barrier to the clinical efficacy of oncolytic viruses but this is being addressed by using novel immune-evasive delivery strategies and immunosuppressive drugs. Noninvasive pharmacokinetic monitoring is facilitated by engineering marker genes into the viral genome. Clinical data on the pharmacokinetics of oncolytic viruses will be the key to accelerating their development and approval as effective anticancer drugs. This review introduces concepts relevant to the use of viruses as anticancer drugs, emphasizing targeting mechanisms as well as safety and efficacy issues that are currently limiting their clinical success.
Insights
Oncolytic viruses are engineered to selectively destroy cancer cells. Overcoming antiviral immunity and studying their pharmacokinetics are key to developing these viruses as effective anticancer drugs.
Area of Science:
- Oncology
- Virology
- Pharmacology
Background:
- Oncolytic viruses are emerging as a promising class of anticancer therapeutics.
- These viruses selectively replicate within tumor cells, leading to tumor destruction while sparing healthy tissues.
- Their development as drugs necessitates rigorous safety and efficacy evaluations in human subjects.
Purpose of the Study:
- To review the current concepts and strategies in the development of oncolytic viruses as anticancer drugs.
- To highlight the importance of tumor-specific targeting mechanisms for enhanced safety.
- To discuss the challenges and advancements in addressing antiviral immunity and enabling pharmacokinetic studies.
Main Methods:
- Review of virus-engineering strategies for tumor specificity.
- Discussion of immune-evasive delivery systems and immunosuppressive therapies.
- Exploration of marker gene engineering for pharmacokinetic monitoring.
Main Results:
- Virus engineering offers ingenious strategies to achieve neoplastic tissue specificity, crucial for safety.
- Antiviral immunity presents a significant hurdle to clinical efficacy, being addressed by novel delivery and drug strategies.
- Marker gene integration facilitates noninvasive pharmacokinetic monitoring, essential for drug development.
Conclusions:
- Oncolytic virus therapy holds significant potential for cancer treatment.
- Further research into targeting mechanisms, safety, efficacy, and pharmacokinetic studies is vital for clinical success.
- Accelerating the development and approval of oncolytic viruses requires robust clinical data on their behavior in patients.
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