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Could dog food additive prevent disabling chemotherapy side effect?
Date:9/20/2013

Working with cells in test tubes and in mice, researchers at Johns Hopkins have discovered that a chemical commonly used as a dog food preservative may prevent the kind of painful nerve damage found in the hands and feet of four out of five cancer patients taking the chemotherapy drug Taxol.

The Food and Drug Administration-approved preservative, an antioxidant called ethoxyquin, was shown in experiments to bind to certain cell proteins in a way that limits their exposure to the damaging effects of Taxol, the researchers say.

The hope, they say, is to build on the protective effect of ethoxyquin's chemistry and develop a drug that could be given to cancer patients before taking Taxol, in much the same way that anti-nausea medication is given to stave off the nausea that commonly accompanies chemotherapy. While half of Taxol users recover from the pain damage, known as peripheral neuropathy, the other half continue to have often debilitating pain, numbness and tingling for the rest of their lives.

"Millions of people with breast cancer, ovarian cancer and other solid tumors get Taxol to treat their cancer and 80 percent of them will get peripheral neuropathy as a result," says Ahmet Hke, M.D., Ph.D., a professor of neurology and neuroscience at the Johns Hopkins University School of Medicine and director of the Neuromuscular Division. "They're living longer thanks to the chemotherapy, but they are often miserable. Our goal is to prevent them from getting neuropathy in the first place."

A report on Hke's research is published online in the Annals of Neurology.

Hke and his team knew from previous experiments that adding Taxol to a nerve cell line growing in a petri dish would cause neurodegeneration. In a series of experiments, they set out to hunt for compounds that might interrupt the degenerative process by adding Taxol to nerve cells along with some 2,000 chemicals one at a time to see which, if any, co
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Contact: Stephanie Desmon
sdesmon1@jhmi.edu
410-955-8665
Johns Hopkins Medicine
Source:Eurekalert

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