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Researchers identify key mechanism in metabolic pathway that fuels cancers
Date:5/22/2014

DALLAS May 22, 2014 In a breakthrough discovery at the Children's Medical Center Research Institute at UT Southwestern (CRI), a research team led by Ralph DeBerardinis, M.D., Ph.D., has taken a significant step in cracking the code of an atypical metabolic pathway that allows certain cancerous tumors to thrive, providing a possible roadmap for defeating such cancers.

Published in Cell Reports, and following up on Dr. DeBerardinis' landmark finding in 2011, this most recent discovery identifies the triggering mechanism that plays a key role in causing a series of energy-generating chemical reactions known as the Krebs cycle to run in reverse.

"With this finding, we have learned there are particular enzymes that work together to enable the reverse pathway to function, much like the tiny gears that turn in opposite directions to power a mechanical clock," said Dr. DeBerardinis, director of CRI's Genetic and Metabolic Disease Program and associate professor in the Department of Pediatrics and the Eugene McDermott Center for Human Growth and Development at UT Southwestern Medical Center.

The identification of the mechanism could provide a future target for drugs that would attack tumors relying upon the reverse pathway for sustenance and growth. Tumors of this type, often found in the brain, lungs and kidneys, tend to be difficult for oncologists to treat because cells using the atypical pathway seem to resist existing treatments like chemotherapy.

"Prior to this discovery, we didn't have enough information about how to tap into the reverse metabolic pathway without disrupting the pathways that were operating in the typical, forward manner," said Dr. DeBerardinis, senior author of the study. "We no
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Contact: Mark Lane
mark.lane@utsouthwestern.edu
214-633-1795
UT Southwestern Medical Center
Source:Eurekalert  

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