Navigation Links
New compound overcomes drug-resistant Staph infection in mice
Date:1/7/2013

CHAMPAIGN, lll. Researchers have discovered a new compound that restores the health of mice infected with methicillin-resistant Staphylococcus aureus (MRSA), an otherwise dangerous bacterial infection. The new compound targets an enzyme not found in human cells but which is essential to bacterial survival.

The research team, led by scientists at the University of Illinois and the University of California, San Diego, reports the new findings in the Proceedings of the National Academy of Sciences. The team discovered and developed several compounds that are promising leads for antibacterial drug development, and the most potent was tested in mice infected with MRSA.

The rise of antibiotic-resistant bacterial infections is a global public health problem, said U. of I. chemistry professor Eric Oldfield, who led the research with UC San Diego professor Andrew McCammon.

"There's an urgent need for more antibiotics because of drug resistance," Oldfield said. "There are, for example, completely drug-resistant strains of tuberculosis. None of the drugs work against these strains of tuberculosis and so, if you get it, you die."

Other infections, such as gonorrhea, which once were easily cured with antibiotics, also are becoming resistant to treatment, Oldfield said. "And Staph itself actually kills more people in the U.S. than does HIV/AIDS."

To begin the study, McCammon and his colleagues at UC San Diego used computer simulations to look for potential chinks in the armor of a bacterial enzyme known as FPPS that aids in bacterial cell wall formation. The researchers then screened libraries of small molecules to identify some that might target those sites and interrupt the activity of FPPS. Oldfield's team tested some of these molecules against FPPS, but found that they were not particularly potent inhibitors of the enzyme.

"Then we tested the most promising compound against the next enzyme in the pathway, and we found that it was 20 times more active against that enzyme," Oldfield said.

That enzyme, called UPPS, "is important because it's involved in bacterial cell wall biosynthesis," he said. "And a lot of the antibiotics that we have drugs like penicillin, methicillin, vancomycin all target bacterial cell wall biosynthesis."

Graduate student Wei Zhu and research scientist Yonghui Zhang worked with Oldfield to develop and test new analogs of the compound that worked against UPPS.

"And we found one that was about 1,000 times more active than the first hit we had against FPPS," Oldfield said.

Illinois chemistry and Institute for Genomic Biology professor Douglas Mitchell tested the new compound against regular and drug-resistant S. aureus in cell culture and found that it had potent activity against both.

"He also found that it augmented the effects of methicillin" in methicillin-resistant Staph strains, Oldfield said.

In a final test, Dr. Victor Nizet at UC San Diego used the new compound to treat mice infected with MRSA.

"Twenty out of 20 animals survived if they were treated with this drug lead and zero survived if they weren't treated," Oldfield said.

More years of study will be needed to determine whether this compound or others like it will be effective in humans, Oldfield said, but the findings may allow scientists to target multiple enzymes essential to bacterial survival, thus reducing the likelihood that new forms of drug resistance will emerge.


'/>"/>

Contact: Diana Yates
diya@illinois.edu
217-333-5802
University of Illinois at Urbana-Champaign
Source:Eurekalert  

Related biology news :

1. Canadian girl, 16, invents disease-fighting, anti-aging compound using tree particles
2. Biosensor illuminates compounds to aid fight against TB
3. New screening technique yields elusive compounds to block immune-regulating enzyme
4. Sulphur and iron compounds common in old shipwrecks
5. Heparin-like compounds inhibit breast cancer metastasis to bone
6. Like curry? New biological role identified for compound used in ancient medicine
7. Nuisance seaweed found to produce compounds with biomedical potential
8. Dont feel like exercise? Scientists find compound that may help you work out harder
9. New drug-screening method yields long-sought anti-HIV compounds
10. Nonstoichiometric Compounds V - An ECI Conference Series
11. New compound holds promise for treating Duchenne MD, other inherited diseases
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New compound overcomes drug-resistant Staph infection in mice
(Date:4/5/2017)... Allen Institute for Cell Science today announces the launch ... dynamic digital window into the human cell. The website ... deep learning to create predictive models of cell organization, ... suite of powerful tools. The Allen Cell Explorer will ... resources created and shared by the Allen Institute for ...
(Date:4/4/2017)...   EyeLock LLC , a leader of iris-based ... Patent and Trademark Office (USPTO) has issued U.S. Patent ... an iris image with a face image acquired in ... 45 th issued patent. "The ... the multi-modal biometric capabilities that have recently come to ...
(Date:3/30/2017)... HONG KONG , March 30, 2017 ... developed a system for three-dimensional (3D) fingerprint identification by adopting ground ... technology into a new realm of speed and accuracy for use ... applications at an affordable cost. ... ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... of a complex biological network, a depiction of a system of linkages and ... Dmitry Korkin, PhD, associate professor of computer science at Worcester Polytechnic Institute (WPI) ...
(Date:10/12/2017)... , ... October 12, 2017 , ... ... Vilnius, Lithuania, announced today that they have entered into a multiyear collaboration to ... provide CRISPR researchers with additional tools for gene editing across all applications. , ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... with the addition of its newest module, US Hemostats & Sealants. , SmartTRAK’s ... hemostats, absorbable hemostats, fibrin sealants, synthetic sealants and biologic sealants used in surgical ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... analysis platform specifically designed for life science researchers to analyze and interpret ... Rosalind Franklin, who made a major contribution to the discovery of the ...
Breaking Biology Technology: