ROCHESTER, Minn. Mayo Clinic investigators and collaborators from the United Kingdom cured well-established prostate tumors in mice using a human vaccine with no apparent side effects. This novel cancer treatment approach encourages the immune system to rid itself of prostate tumors without assistance from toxic chemotherapies and radiation treatments. Such a treatment model could some day help people to live tumor free with fewer side effects than those experienced from current therapies.
The findings appear in the journal Nature Medicine.
"We are hopeful that this will overcome some of the major hurdles which we have seen with immunotherapy cancer research," says Richard Vile, Ph.D., Mayo Clinic immunologist, Richard M. Schulze Family Foundation Professor and a lead author of the study. Clinical trials could begin within two years.
Mayo's immunotherapy research led by Dr. Vile already shows promise in treating prostate cancer and melanoma. It also is a prime candidate for treatment of many more aggressive cancers, such as lung, brain and pancreatic cancer.
Among the team's findings: no trace of autoimmune diseases in the mice. The murine T-cells attacked only cancerous prostate cells, leaving the healthy tissue unharmed.
To develop this new approach, geneticists assembled snippets of genetic code from healthy human prostate tissue into a complementary DNA (cDNA) library. These bits of cDNA were then inserted into a swarm of vesicular stomatitis viruses (VSV), which were cultured and reintroduced into the test mice as a vaccine during a series of intravenous injections.
Development of comprehensive cDNA libraries from healthy human prostate tissue represents the key to successful immunotherapy. All infections, allergens and tissues, including tumors, have a unique fingerprint called an antigen a molecular protein tag that triggers a response from the body's immune system. Dr. Vile deployed the h
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| Contact: Bob Nellis newsbureau@mayo.edu 507-284-5005 Mayo Clinic Source:Eurekalert |