[Development of Oncolytic Viruses against Cancer]

Hiroshi Tazawa1, Shinji Kuroda, Shunsuke Kagawa

  • 1Dept. of Gastroenterological Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences,Okayama University.

Insights

Oncolytic viruses (OVs) offer a novel cancer treatment by selectively killing tumor cells. They enhance conventional therapies and boost immune responses, showing promise in clinical trials.

Area of Science:

  • Oncology
  • Virology
  • Immunology

Background:

  • Oncolytic virotherapy utilizes genetically modified oncolytic viruses (OVs) for cancer treatment.
  • OVs selectively replicate in tumor cells, leading to cell lysis and death.

Purpose of the Study:

  • To review the therapeutic potential of OVs in monotherapy and combination treatments.
  • To summarize OVs currently in clinical trials for cancer treatment.

Main Methods:

  • Review of existing literature on oncolytic virotherapy.
  • Analysis of OVs' mechanisms of action.
  • Summary of clinical trial data for representative OVs.

Main Results:

  • OVs directly induce tumor cell death.
  • OVs enhance chemoradiotherapy by suppressing survival signaling.
  • OVs activate antitumor immunity via immunogenic cell death and improve immune checkpoint inhibitor efficacy.

Conclusions:

  • Oncolytic virotherapy presents a promising approach for cancer treatment.
  • OVs can be used as monotherapy or in combination with conventional treatments.
  • Several OV therapies are advancing through clinical trials.

Related Concept Videos

Cancer Vaccines01:30

Cancer Vaccines

Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
520
Cancer Therapies02:49

Cancer Therapies

Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
8.0K
Tumor Immunotherapy01:27

Tumor Immunotherapy

Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
675
Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
5.4K
Mechanisms of Retrovirus-induced Cancers01:51

Mechanisms of Retrovirus-induced Cancers

Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
5.3K
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
7.8K