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Published on: January 7, 2019
Targeting autophagy to enhance oncolytic virus-based cancer therapy
Songshu Meng1, Jiansheng Xu, Yantao Wu
1Dalian Medical University Cancer Center, Institute of Cancer Stem Cell, 9 Lvshun Road South, Dalian 116044, Chin. ssmeng@yzu.edu.cn
Introduction:
Autophagy is a conserved catabolic process crucial in maintaining cellular homeostasis. On infection, oncolytic viruses (OVs) perturb the cellular autophagy machinery in infected tumor cells both in vitro and in vivo. Currently, pharmacological modulation of autophagy in OV-infected tumor cells has been shown to augment OV-mediated antitumor effects in preclinical studies. Combination of OVs with autophagy modulators can, therefore, have many potential applications in the future research on targeting autophagy and novel anticancer therapies.
Areas Covered:
This review provides a detailed description of known interactions between OVs and autophagy and summarizes the roles of autophagy in OV replication and cell lysis. The recent literature on targeting autophagy with either the autophagy inducers, such as rapamycin, or autophagy inhibitors, such as chloroquine, to increase OV-induced cytotoxicity is reviewed to help researchers in further investigations. The major challenge for investigators is to understand the molecular mechanism underlying the interplay between OV and the autophagy machinery and its effect on oncolysis.
Expert Opinion:
Targeting the cellular autophagy machinery could be explored as a new therapeutic strategy to enhance OV-mediated antitumor effects in the future.
Insights
Oncolytic viruses (OVs) interact with cellular autophagy. Modulating autophagy, using inducers or inhibitors, can enhance OV antitumor effects, offering a promising strategy for novel cancer therapies.
Area of Science:
- Oncology
- Virology
- Cell Biology
Background:
- Autophagy is a fundamental cellular process for maintaining homeostasis.
- Oncolytic viruses (OVs) disrupt cellular autophagy during infection of tumor cells.
- Pharmacological modulation of autophagy shows potential in preclinical OV therapy.
Purpose of the Study:
- To review the interactions between OVs and autophagy.
- To summarize autophagy's role in OV replication and tumor cell lysis.
- To explore autophagy modulation as an anticancer strategy.
Main Methods:
- Literature review of OV-autophagy interactions.
- Analysis of studies using autophagy inducers (e.g., rapamycin) and inhibitors (e.g., chloroquine).
- Examination of OV-induced cytotoxicity and oncolysis.
Main Results:
- Autophagy plays a dual role in OV replication and OV-mediated cell death.
- Targeting autophagy can significantly enhance OV antitumor efficacy.
- Understanding the molecular interplay is key for optimizing combination therapies.
Conclusions:
- Modulating autophagy presents a viable therapeutic strategy to boost OV antitumor effects.
- Further research into the OV-autophagy molecular mechanisms is warranted.
- Combination of OVs with autophagy modulators holds significant therapeutic potential.
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