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Oncolytic immunotherapy: unlocking the potential of viruses to help target cancer

Omid Hamid1, Brianna Hoffner2, Eduard Gasal3

  • 1The Angeles Clinic and Research Institute, 11818 Wilshire Blvd #200, Los Angeles, CA, 90025, USA. ohamid@theangelesclinic.org.

Cancer Immunology, Immunotherapy : CII
|July 17, 2017
PubMed

Insights

Oncolytic immunotherapy uses modified viruses to fight cancer. Talimogene laherparepvec, a modified HSV-1 virus, showed a higher durable response rate in melanoma patients, indicating potential for systemic antitumor effects.

Area of Science:

  • Oncolytic immunotherapy
  • Cancer immunotherapy
  • Viral oncology

Background:

  • Oncolytic immunotherapy investigates using modified viruses to selectively target and destroy cancer cells.
  • Various viral backbones, including adenovirus and reovirus, are being explored for cancer treatment.
  • Talimogene laherparepvec, a recombinant HSV-1 virus, is the most clinically advanced oncolytic virus.

Purpose of the Study:

  • To review the mechanisms of action of oncolytic viruses.
  • To highlight select oncolytic virus agents and combination therapies in development.
  • To discuss the clinical progress of oncolytic immunotherapy.

Main Methods:

  • Review of preclinical and clinical studies on oncolytic viruses.
  • Analysis of viral mechanisms targeting cancer cells and stimulating anti-tumor immunity.
  • Evaluation of clinical trial data for oncolytic virus efficacy and safety.

Main Results:

  • Talimogene laherparepvec demonstrated a significantly higher durable response rate in metastatic melanoma compared to GM-CSF.
  • Treatment with talimogene laherparepvec led to responses in uninjected lesions, suggesting systemic effects.
  • Ongoing studies are exploring combinations of oncolytic viruses with other immunologic agents.

Conclusions:

  • Oncolytic viruses represent a promising approach in cancer immunotherapy.
  • Talimogene laherparepvec shows significant potential for treating unresectable metastatic melanoma.
  • Combination strategies involving oncolytic viruses are crucial for future therapeutic development.
Keywords:
ImmunotherapyMelanomaOncolytic immunotherapyTalimogene laherparepvec

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