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Updated: Aug 8, 2026

Generation of Multivirus-specific T Cells to Prevent/treat Viral Infections after Allogeneic Hematopoietic Stem Cell Transplant
Published on: May 27, 2011
[Viral therapy of cancer]
1Gene Therapy Center, University of Alabama at Birmingham, AL, USA. kaori.suzuki@ccc.uab.edu
Abstract:
In spite of the advances achieved in cancer therapeutics, conventional therapies still face problems such as toxicity to normal tissues and low efficacy in advanced phases of the disease. One of the most recent options, albeit experimental, is gene therapy. This strategy shows higher specificity than conventional therapies, but the low efficiency of gene transduction is a hurdle yet to be overcome, and the clinical trials have not shown the expected efficacy. Recently, oncolytic viruses have revived as an alternative in the field of cancer therapeutics. By virtue of the advances in virology and molecular biology techniques, the manipulation of viral genomes to attenuate their pathogenicity and the modification of their life cycle to allow tumor specific viral replication are now possible. At the moment, adenovirus and herpes simplex type 1 mutants are the most commonly employed viruses. Recent clinical trials using these mutant viruses have shown safety and efficacy. Moreover, viral therapy has been combined with radiotherapy or chemotherapy demonstrating additive antineoplastic effects. In this manuscript, we review the biology behind this therapy, the obstacles, and the ongoing clinical trials.
Insights
Oncolytic viruses offer a promising cancer therapy alternative, overcoming conventional treatment limitations. Advances in virology enable engineered viruses for targeted tumor replication, showing safety and efficacy in clinical trials.
Area of Science:
- Oncology
- Virology
- Molecular Biology
Context:
- Conventional cancer therapies face challenges including toxicity and limited efficacy in advanced stages.
- Gene therapy shows promise but struggles with transduction efficiency.
- Oncolytic viruses are emerging as a viable alternative for cancer treatment.
Purpose:
- To review the biological mechanisms of oncolytic virus therapy.
- To discuss the challenges and limitations associated with this therapeutic approach.
- To summarize the current status of ongoing clinical trials for oncolytic virotherapy.
Summary:
- Oncolytic viruses are engineered to selectively replicate within tumor cells, leading to cancer cell destruction.
- Adenovirus and herpes simplex type 1 mutants are prominent examples currently used in clinical studies.
- Recent trials demonstrate the safety and efficacy of these viruses, with potential for combination therapies.
Impact:
- Oncolytic virus therapy presents a novel strategy with improved tumor specificity and reduced normal tissue toxicity.
- Successful clinical trials indicate a potential paradigm shift in cancer treatment modalities.
- Combination of oncolytic virotherapy with chemotherapy or radiotherapy shows additive antineoplastic effects, enhancing treatment outcomes.
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