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Oncolytic viruses are designed to replicate in and kill cancer cells, and have shown tremendous promise in preclinical and clinical studies. Indeed, several oncolytic viruses are available to patients in a number of different countries around the world. However, most oncolytic viruses show a poor ability to spread throughout the tumor mass, frequently leading to only a partial response and regrowth of the tumor. One approach to improve spread of the viral effect throughout the tumor mass is to arm the oncolytic virus with a fusogenic protein. In this manner, a single infected cell can fuse with many adjacent uninfected cells, essentially amplifying the anti-tumor effects. In this review, we discuss the development and use of fusogenic proteins to enhance the efficacy of human adenovirus-based vectors for cancer therapy. |
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