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Sleeping sickness drug may provide long-term protection against skin cancer
Date:10/23/2011

BOSTON An antiparasitic agent used to treat African sleeping sickness might someday be used to prevent nonmelanoma skin cancers. Researchers found that DFMO, or α-difluoromethylornithine, still appeared to protect against nonmelanoma skin cancers years after people stopped taking the drug, according to a poster presented at the 10th AACR International Conference on Frontiers in Cancer Prevention Research, held Oct. 22-25, 2011.

In this follow-up study, researchers evaluated prolonged evidence of a protective effect of DFMO among 209 people who had participated in an earlier study. The researchers also wanted to ensure there were no obvious deleterious effects associated with the drug, according to Howard H. Bailey, M.D., professor of medicine, and study presenter Sarah Lamont, a medical student, both from the University of Wisconsin School of Medicine and Public Health.

The original study was a phase III, randomized, double-blind, prospective study of 291 men and women with a history of nonmelanoma skin cancer. They were assigned to either DFMO or a placebo for four to five years. At the end of the study period, researchers found a reduced skin cancer incidence among those assigned to DFMO.

"We showed a significant protective effect against basal cell carcinoma, but not a significant amount of protection against squamous cell carcinoma of the skin," Bailey said.

The main side effect was a slight ototoxicity that was found on testing, but this was not associated with a noticeable reduction in hearing by the subjects.

In the current retrospective study, researchers reviewed the electronic medical records of 209 of the original participants to establish cancer rates and to see if any other illnesses they might have developed could be attributed to DFMO.

"We found there is still evidence that the men and women assigned to DFMO for five years continued to have a lower incidence of nonmelanoma skin cancer
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Contact: Jeremy Moore
Jeremy.Moore@aacr.org
267-646-0557
American Association for Cancer Research
Source:Eurekalert

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