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Oncolytic (replication-competent) adenoviruses as anticancer agents

Karoly Toth1, Debanjan Dhar, William S M Wold

  • 1Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, Missouri, USA. toth@slu.edu

Expert Opinion on Biological Therapy
|February 6, 2010
PubMed
Abstract

Insights

Genetically-engineered oncolytic adenoviruses (Ads) offer a promising avenue for cancer treatment by selectively killing tumor cells. Ongoing research focuses on enhancing their efficacy and integrating them into current cancer therapy protocols.

Area of Science:

  • Oncolytic virotherapy
  • Gene therapy vectors
  • Cancer treatment modalities

Background:

  • Despite advances in neoplasia therapies, novel anti-cancer treatments are crucial.
  • Genetically-engineered oncolytic adenoviruses (Ads) represent a viable therapeutic option.
  • Oncolytic Ads eliminate cancer cells through viral replication and spread to neighboring tumor cells.

Purpose of the Study:

  • To review the fundamental biology of adenoviruses (Ads).
  • To summarize the existing literature on oncolytic Ads from 1996 to the present.
  • To provide an overview of oncolytic Ad vectors, their advantages, disadvantages, and future research directions.

Main Methods:

  • Review of basic adenovirus biology.
  • Comprehensive literature search for oncolytic Ads (1996-present).
  • Analysis of pre-clinical and clinical experimental data.

Main Results:

  • Oncolytic Ads demonstrate significant potential as anti-cancer agents.
  • Key features, benefits, and limitations of various oncolytic Ad vectors are discussed.
  • Obstacles to development and future research avenues are identified.

Conclusions:

  • Adenoviruses are attractive gene therapy vectors due to their safety, production scalability, genetic stability, and ease of manipulation.
  • Oncolytic Ads have shown remarkable safety in clinical trials, with no dose-limiting toxicity observed.
  • Enhancing vector efficacy and integrating oncolytic virotherapy into existing treatment paradigms are the primary challenges for future research.

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