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New research strategy for understanding drug resistance in leukemia
Date:9/4/2009

UCSF researchers have developed a new approach to identify specific genes that influence how cancer cells respond to drugs and how they become resistant. This strategy, which involves producing diverse genetic mutations that result in leukemia and associating specific mutations with treatment outcomes, will enable researchers to better understand how drug resistance occurs in leukemia and other cancers, and has important long-term implications for the development of more effective therapies.

Findings are reported in the Advance Online Publication of the journal "Nature" and are available at http://www.nature.com/nature/journal/vaop/ncurrent/index.html.

"In trying to understand why certain cancers respond to drugs while certain other cancers fail to respond, we found that a single gene can be the culprit for drug resistance," said Kevin Shannon, MD, senior author of the paper and a pediatric cancer specialist at UCSF Children's Hospital. "The subtlety of what makes a cancer cell become resistant to a drug is truly remarkable."

"When treating patients for cancer, clinical specialists usually only have one or two chances to choose the right drug before it is too late. This makes it incredibly important to understand drug resistance so that we can prioritize therapeutic options," said Jennifer Lauchle, MD, the study's lead author and a pediatric blood and cancer specialist at UCSF Children's Hospital.

In the initial stages of the study, the researchers used a strain of mice that developed acute myelogenous leukemia, or AML, to assess the effectiveness of an experimental cancer drug called a MEK inhibitor. AML is an aggressive cancer that affects both children and adults and causes abnormal white blood cells to grow rapidly and accumulate in the bone marrow, thereby interfering with the production of normal blood cells.

The researchers crea
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Contact: Kate Schoen
kschoen@pubaff.ucsf.edu
415-476-2557
University of California - San Francisco
Source:Eurekalert

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