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Antifungal drug delays need for chemo in advanced prostate cancer
Date:6/2/2011

The oral antifungal drug itraconazole, most commonly used to treat nail fungus, may keep prostate cancer from worsening and delay the need for chemotherapy in men with advanced disease. Details of the finding, from a clinical trial led by Johns Hopkins experts, are scheduled for presentation on Saturday, June 4 at the 2011 American Society of Clinical Oncology (ASCO) annual meeting (abstract #4532).

Currently, the drug is approved to treat fungal infections in nails and other organs. Serious side effects can include heart failure, and Johns Hopkins experts caution that itraconazole needs further study before it can be considered for prostate cancer treatment.

Identified as a potential anticancer drug after Hopkins scientists scoured a database of more than 3,000 FDA-approved drugs, itraconazole appears to block tumor blood vessel growth -- the only drug in its class to do so -- much like the anticancer drug bevacizumab (Avastin). The antifungal also disrupts a key cancer-initiating biological pathway called Hedgehog. Laboratory testing by Johns Hopkins scientist Jun Liu, Ph.D., has shown that human prostate tumors implanted in mice shrink when treated with itraconazole.

"The most effective therapy we have right now for metastatic prostate cancer is hormone therapy, and when it doesn't work, the next step is usually chemotherapy," says Emmanuel Antonarakis, M.D., assistant professor of oncology at the Johns Hopkins Kimmel Cancer Center. In a search for compounds that could put off chemotherapy, the Johns Hopkins team turned to itraconazole.

For the study, patients with prostate cancer that had spread to other organs and did not respond to hormone therapy were randomly assigned to receive low or high doses of itraconazole.

Over 24 weeks of daily treatment with oral itraconazole, the investigators tracked the length of time for each patient's prostate cancer to worsen (called progression-free survival). Evidence o
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Contact: Vanessa Wasta
wasta@jhmi.edu
410-955-1287
Johns Hopkins Medical Institutions
Source:Eurekalert

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