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Laboratory detective work points to potential therapy for rare, drug-resistant cancer
Date:2/12/2014

responded to various concentrations of the 89 drugs in the laboratory, Dr. Duensing and her colleagues identified 37 compounds that showed some anticancer activity in at least one of the concentrations tested. Importantly, they noted that the most promising candidates all belonged to only two major drug classes: inhibitors of gene transcription and so-called topoisomerase II inhibitors. Based on these findings, the research team selected the two most promising compounds for further testing gene transcription inhibitor mithramycin A, which is in clinical trials to treat Ewing sarcoma, and topoisomerase II inhibitor mitoxantrone, which is used in metastatic breast cancer and leukemia.

Both drugs were highly effective in fighting GIST in laboratory tests. Moreover, the mechanism of action of each drug was linked to the specific underlying biology of these tumors.

"These are very encouraging results," said Dr. Duensing. "The next step will be moving our findings to clinical exploration to see if the results we found in the lab hold up in patients."


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Contact: Allison Hydzik
hydzikam@upmc.edu
412-647-9975
University of Pittsburgh Schools of the Health Sciences
Source:Eurekalert  

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