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NIH scientists discover promising target to block Staphylococcus infection
Date:2/10/2013

National Institutes of Health (NIH) scientists have identified a promising lead for developing a new type of drug to treat infection caused by Staphylococcus aureus, a bacterium that frequently resists traditional antibiotics. The researchers discovered a system used by S. aureus to transport toxins that are thought to contribute to severe staph infections. These toxinscalled phenol-soluble modulins (PSMs)have gained much attention in recent years, but their multitude and diversity have hindered efforts to target them for drug development.

Expanding on work that first described S. aureus PSMs in 2007, scientists at the NIH's National Institute of Allergy and Infectious Diseases found that the transport system, which they call Pmt, is common to all S. aureus PSMs and critical for bacterial proliferation and disease development in a mouse model. Their experiments suggest that a drug interfering with Pmt's function could not only prevent production of the PSM toxins, but also directly lead to bacterial death.

Although their study focused on S. aureus, the scientists suspect that Pmt performs the same role in other staphylococci, such as S. epidermidis, the leading cause of hospital-associated infections involving indwelling medical devices such as catheters, pacemakers and prosthetics. They plan to continue their studies to improve the understanding of how PSMs function and to learn how to interfere with the Pmt transport system to block disease.


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Contact: Ken Pekoc
kpekoc@niaid.nih.go
301-402-1663
NIH/National Institute of Allergy and Infectious Diseases
Source:Eurekalert

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