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PARP inhibitor shows activity in pancreatic, prostate cancers among patients carrying BRCA mutations
Date:5/15/2013

eginning olaparib, as did two (25 percent) of the prostate patients. Overall survival at one year was 41 percent for the pancreatic cancer patients, and 50 percent for the prostate cancer patients.

For patients with breast and ovarian cancer, the study confirmed the previously reported activity of olaparib, although tumors treated in this study were much more advanced than in prior studies. For example, in 193 patients with ovarian cancer in whom cisplatin was no longer effective for controlling advanced disease, 31 percent had partial or complete tumor regression on olaparib, and 64 percent were alive at one year. Among 62 patients with metastatic breast cancer patients who had already received at least three chemotherapy regimens, 13 percent responded to new therapy and 45 percent of patients were alive at one year.

The authors found that treatment with olaparib is very well-tolerated. The most commonly reported side effects were mild to moderate fatigue and nausea (each experienced by 59 percent of patients), and transient episodes of vomiting (37 percent). Seventeen percent of patients experienced anemia, and four percent of patients suffered side effects that led to discontinuation of therapy.

As of January 2013, 33 patients remained on the study.

"This study underscores a new paradigm in cancer therapy. We can better fashion treatments for our patients based on a personalized assessment of the genetic factors underlying the cancer," Domchek says. "PARP inhibitors such as olaparib represent the most promising new treatment for individuals suffering from cancer based on inherited BRCA1 and BRCA2 gene mutations."

The results will be presented by lead author Bella Kaufman, MD, from Sheba Medical Center in Tel Hashomer, Israel, in the Tumor Biology poster session from 8 a.m. to noon on Monday, June 3, 2013 in S102 McCormick Place.


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Contact: Holly Auer
holly.auer@uphs.upenn.edu
215-200-2313
University of Pennsylvania School of Medicine
Source:Eurekalert

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