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Scientist creates new cancer drug that is 10 times more potent
Date:8/29/2012

COLUMBIA, Mo. -- Legend has it that Ralph Waldo Emerson once said, "Build a better mousetrap, and the world will beat a path to your door." University of Missouri researchers are doing just that, but instead of building mousetraps, the scientists are targeting cancer drugs. In a new study, MU medicinal chemists have taken an existing drug that is being developed for use in fighting certain types of cancer, added a special structure to it, and created a more potent, efficient weapon against cancer.

"Over the past decade, we have seen an increasing interest in using carboranes in drug design," said Mark W. Lee Jr., assistant professor of chemistry in College of Arts and Science. "Carboranes are clusters of three elements boron, carbon and hydrogen. Carboranes don't fight cancer directly, but they aid in the ability of a drug to bind more tightly to its target, creating a more potent mechanism for destroying the cancer cells."

In the study, Lee and his research team used carboranes to build new drugs designed to shut off a cancer cell's energy production, which is vital for the cell's survival. All cells produce energy through complex, multi-step processes. The key to an effective drug is targeting the process that cancer cells depend on more than healthy cells. By increasing the binding strength of a drug, a smaller dose is required, minimizing side effects and increasing the effectiveness of the therapy. With carboranes, Lee found that the drug is able to bind 10 times more powerfully.

"The reason why these drugs bind stronger to their target is because carboranes exploit a unique and very strong form of hydrogen bonding, the strongest form of interactions for drugs," Lee said.

Lee said that this discovery also will lead to further uses for the drug.

"Too often, after radiation or chemotherapy, cancer cells repair themselves and reinvade the body," Lee said. "This drug not only selectively shuts off the energy pro
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Contact: Christian Basi
BasiC@missouri.edu
573-882-4430
University of Missouri-Columbia
Source:Eurekalert  

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