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Case Western Reserve researcher discovers new 'anti-pathogenic' drugs to treat MRSA
Date:9/16/2010

CLEVELAND September 16, 2010 Menachem Shoham, PhD, associate professor and researcher in the department of biochemistry at the Case Western Reserve University School of Medicine, has identified new anti-pathogenic drugs that, without killing the bacteria, render Methicillin Resistant Staphylococcus Aureus (MRSA) harmless by preventing the production of toxins that cause disease.

Infections of MRSA are a growing public health problem causing 20,000 deaths per year in the U.S. alone. MRSA is the most prevalent bacterial pathogen in hospital settings and in the community at large. The problem has become increasingly severe due to the fact that the bacteria develop resistance to antibiotics. Currently, there are only two antibiotics available to treat MRSA (vancomycin and linezolid) and strains are emerging that are resistant even to these two remaining antibiotics. As result, healthcare providers are running out of options to treat patients suffering from antibiotic-resistant infections, creating a dire need for alternative treatments and approaches.

"Staph bacteria are ubiquitous and normally do not cause infections, however, occasionally these bacteria become harmful due to their secretion of toxins," said Dr. Shoham. "We have discovered potential "anti-pathogenic" drugs that block the production of toxins, thus rendering the bacteria harmless. Contrary to antibiotics, these new anti-pathogenic drugs do not kill the bacteria. And since the survival of the bacteria is not threatened by this approach, the development of resistance, like that to antibiotics, is not anticipated to be a serious problem."

Dr. Shoham identified a bacterial protein, known as AgrA, as the key molecule responsible for the release of toxins. AgrA, however, needs to be activated to induce toxin production. His goal was to block the activation of AgrA with a drug, thus preventing the cascade of toxin release into the blood that can lead to serious infections t
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Contact: Christina DeAngelis
christina.deangelis@case.edu
216-368-3635
Case Western Reserve University
Source:Eurekalert

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