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 toxins—called 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.
S Chatterjee et al. Essential Staphylococcus aureus toxin export system. Nature MedicineDOI: 10.1038/nm3047 (2013).
R Wang et al. Identification of novel cytolytic peptides as key virulence determinants of community-associated MRSA. Nature Medicine DOI: 10.1038/nm1656 (2007).
NIH/National Institute of Allergy and Infectious Diseases: http://www.niaid.nih.gov
This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.
Results of largest ever genetics study of a single population could also help refine dates for major events during human evolution Humans are evolving more rapidly than previously thought, according to the largest ever genetics study of a single population.
Latest genetic tests reveal another break in the male line, potentially undermining the legitimacy of the entire House of Plantagenet When scientists revealed last year that an adulterous affair had apparently broken the male line in Richard III’s family tree, they vowed to investigate further.
By 2016, Icelandic genetics company deCODE will have data on half the country's population. Releasing the data will be controversial, but could save lives
A clinical trial has shown that the drug aducanumab slows cognitive decline in people with Alzheimer's and reduces the amount of amyloid plaque in their brain
A leading researcher issues a call for pills that deliver a full course of treatment in one swallow.One of the world’s preëminent biomedical researchers is calling for a concerted effort by scientists to develop pills that would stay in the stomach or gut for weeks or months once swallowed, delivering one or more drugs continuously or over set intervals.
Two genes responsible for building up drug-resistance can easily be shared between a family of bacteria
When malaria parasites infect blood, they manufacture odor molecules that smell sweet to mosquitoes, scientists report. So how do these odors get from the bloodstream to the insects?
Researchers are developing new method of wireless deep brain stimulation.
Zoos belonging to World Association of Zoos and Aquariums filmed allowing shocking mistreatment of elephants, dolphins, lions, bears, penguins and whales
Owners of Highland Wildlife Park hope Victoria, 18, will get chummy with male Arktos during her stay in the Cairngorms