Each year, nearly 300,000 patients receive the lifesaving chemotherapy 5-fluorouracil (5-FU) to treat many types of cancer, including colorectal, breast, bowel, skin, pancreatic, and esophageal cancer. While it can be an effective treatment, it doesn’t work for everyone. In fact, up to 30 percent of those who receive the standard dose can have serious, life-threatening side effects.
Robert Diasio, M.D., director, Mayo Clinic Cancer Center, has uncovered genetic variations that cause some patients to experience these serious side effects. Now using pharmacogenomics testing, which looks at how a person’s genetic traits affect their medication response, and a new gene verifier model, Dr. Diasio and his colleagues are able to test and find a safe, alternative 5-FU dose, allowing these patients to get the benefit of treatment, without harmful side effects.
“While a standard dose of 5-FU can be very effective in treating many cancers, it is challenging to predict who will have serious side effects from the therapy. That’s because genetic testing prior to therapy is not mandatory. Therefore, we’re only able to identify these patients after they’ve had therapy and experienced severe complications,” says Dr. Diasio. Read the rest of the article on the Center for Individualized Medicine blog.
Other Mayo Clinic medical research websites: