These so-called superbugs are actually bacterial strains that produce an enzyme known as New Delhi metallo-â-lactamase (NDM-1). Bacteria that produce this enzyme are practically impervious to antibiotics because NDM-1renders certain antibiotics unable to bind with their bacterial targets. Since NDM-1 is found in Gram-negative bacteria like K. pneumoniae, which causes pneumonia, urinary tract, and other common hospital-acquired infections, it is of particular concern.
“To begin with, there are fewer antibiotic options for treating infections caused by Gram-negative bacteria than for those caused by Gram-positive bacteria,” says Dr. Roberta Worthington, NC State research assistant professor of chemistry. “Gram-negative bacteria with the NDM-1 enzyme effectively neutralize the few weapons we have in our arsenal, making them especially difficult, if not impossible, to treat with existing antibiotic therapy.”
Previously, NC State chemist Dr. Christian Melander had found that a compound derived from a class of molecules known as 2-aminoimidazoles “recharged” existing antibiotics, making them effective against Gram-positive antibiotic-resistant bacteria like the Staphylococcus strain MRSA. So Melander, Worthington and graduate students Cynthia Bunders and Catherine Reed set to work on a variety of the compound that might prove similarly effective against their Gram-negative brethren.
In a paper published in ACS Medicinal Chemistry Letters, Worthington and Melander describe a compound that, when used in conjunction with the antibiotic imipenem, increased the antibiotic’s effectiveness against the antibiotic-resistant K. pneumoniae 16-fold. The researchers believe that these early results are very promising for future treatments.
“We’ve demonstrated that we have the ability to take out the scariest superbug out there,” Melander says. “Hopefully further research will allow us to make the compound even more effective, and make these infections little more than a nuisance.”
The research was funded by the National Institutes of Health and the Jimmy V Foundation. The Department of Chemistry is part of NC State’s College of Physical and Mathematical Sciences.
Note to editors: an abstract of the paper follows.
“Small Molecule Suppression of Carbapenem Resistance in NDM-1 Producing Klebsiella pneumoniae”Authors: Roberta J. Worthington, Cynthia A. Bunders, Catherine S. Reed, and Christian Melander, North Carolina State University
Published: online in ACS Medical Chemistry LettersAbstract:
Tracey Peake | EurekAlert!
Researchers uncover protein-based “cancer signature”
05.12.2016 | Universität Basel
The Nagoya Protocol Creates Disadvantages for Many Countries when Applied to Microorganisms
05.12.2016 | Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
05.12.2016 | Power and Electrical Engineering
05.12.2016 | Materials Sciences
05.12.2016 | Power and Electrical Engineering