Antitumor Benefits of Antiviral Immunity: An Underappreciated Aspect of Oncolytic Virotherapies

Trends Immunol. 2018 Mar;39(3):209-221. doi: 10.1016/j.it.2017.11.006. Epub 2017 Dec 20.

Abstract

Oncolytic viruses (OVs) represent a new class of cancer immunotherapeutics. Administration of OVs to cancer-bearing hosts induces two distinct immunities: antiviral and antitumor. While antitumor immunity is beneficial, antiviral immune responses are often considered detrimental for the efficacy of OV-based therapy. The existing dogma postulates that anti-OV immune responses restrict viral replication and spread, and thus reduce direct OV-mediated killing of cancer cells. Accordingly, a myriad of therapeutic strategies aimed at mitigating anti-OV immune responses is presently being tested. Here, we advocate that OV-induced antiviral immune responses hold intrinsic anticancer benefits and are essential for establishing clinically desired antitumor immunity. Thus, to achieve the optimal efficacy of OV-based cancer immunotherapies, strategic management of anti-OV immune responses is of critical importance.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Antigens, Neoplasm / immunology*
  • Humans
  • Immunity
  • Immunization
  • Immunotherapy / methods*
  • Neoplasms / immunology
  • Neoplasms / therapy*
  • Neoplasms / virology
  • Oncolytic Virotherapy / methods*
  • Oncolytic Viruses / physiology*
  • Virus Replication

Substances

  • Antigens, Neoplasm

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