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Combinatorial therapy allows viruses to destroy tumors

Date:
April 3, 2010
Source:
Journal of Clinical Investigation
Summary:
For several years, researchers have been developing a new approach to treating cancer that uses viruses to infect and kill cancer cells while leaving normal cells unharmed. New research indicates that this approach, which is known as oncolytic virotherapy, can be combined with a standard clinical therapy to provide substantial regression and cure of tumors in mice, leading to the suggestion that this combinatorial approach could be of tremendous benefit in the clinic.
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For several years, researchers have been developing a new approach to treating cancer that uses viruses to infect and kill cancer cells while leaving normal cells unharmed. Recent data have indicated that this approach, which is known as oncolytic virotherapy, has potential.

Now, Richard Vile and colleagues, at the Mayo Clinic, Rochester, have found that this approach can be combined with a standard clinical therapy to provide substantial regression and cure of tumors in mice, leading them to suggest that this combinatorial approach could be of tremendous benefit in the clinic.

Tumors that grow to a certain size need to form new blood vessels if they are to continuing growing and spread to other sites. One of the molecules that controls this new blood vessel growth, VEGF, is the target of drugs used to treat several forms of cancer. In this study, the authors found that modulating VEGF signaling, for example by transiently stopping anti-VEGF therapy in mice harboring cancer cells expressing high levels of VEGF, allowed the cells that line tumor blood vessels to be targeted and killed by viruses.

Importantly, as this approach targets the cells lining tumor blood vessels, rather than specific types of tumor cells, the authors suggest that this combinatorial approach to therapy could be used to treat a wide range of cancers.

The research appears in the Journal of Clinical Investigation.


Story Source:

The above story is based on materials provided by Journal of Clinical Investigation. Note: Materials may be edited for content and length.


Journal Reference:

  1. Timothy Kottke, Geoff Hall, Jose Pulido, Rosa Maria Diaz, Jill Thompson, Heung Chong, Peter Selby, Matt Coffey, Hardev Pandha, John Chester, Alan Melcher, Kevin Harrington and Richard Vile. Antiangiogenic cancer therapy combined with oncolytic virotherapy leads to regression of established tumors in mice. Journal of Clinical Investigation, 2010; DOI: 10.1172/JCI41431

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Journal of Clinical Investigation. "Combinatorial therapy allows viruses to destroy tumors." ScienceDaily. ScienceDaily, 3 April 2010. <www.sciencedaily.com/releases/2010/04/100401173713.htm>.
Journal of Clinical Investigation. (2010, April 3). Combinatorial therapy allows viruses to destroy tumors. ScienceDaily. Retrieved May 25, 2015 from www.sciencedaily.com/releases/2010/04/100401173713.htm
Journal of Clinical Investigation. "Combinatorial therapy allows viruses to destroy tumors." ScienceDaily. www.sciencedaily.com/releases/2010/04/100401173713.htm (accessed May 25, 2015).

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