Potentiating antibacterial activity by predictably enhancing endogenous microbial ROS production

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Potentiating antibacterial activity by predictably enhancing endogenous microbial ROS production

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Title: Potentiating antibacterial activity by predictably enhancing endogenous microbial ROS production
Author: Brynildsen, Mark P.; Winkler, Jonathan A.; Spina, Catherine S.; MacDonald, I. Cody; Collins, James J.

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Citation: Brynildsen, Mark P., Jonathan A. Winkler, Catherine S. Spina, I. Cody MacDonald, and James J. Collins. 2012. “Potentiating antibacterial activity by predictably enhancing endogenous microbial ROS production.” Nature biotechnology 31 (2): 160-165. doi:10.1038/nbt.2458. http://dx.doi.org/10.1038/nbt.2458.
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Abstract: The ever-increasing incidence of antibiotic-resistant infections combined with a weak pipeline of new antibiotics has created a global public health crisis1. Accordingly, novel strategies for enhancing our antibiotic arsenal are needed. As antibiotics kill bacteria in part by inducing reactive oxygen species (ROS)2–4, we reasoned that targeting microbial ROS production might potentiate antibiotic activity. Here we show that ROS production can be predictably enhanced in Escherichia coli, increasing the bacteria’s susceptibility to oxidative attack. We developed an ensemble, genome-scale metabolic modeling approach capable of predicting ROS production in E. coli. The metabolic network was systematically perturbed and its flux distribution analyzed to identify targets predicted to increase ROS production. In silico–predicted targets were experimentally validated and shown to confer increased susceptibility to oxidants. Validated targets also increased susceptibility to killing by antibiotics. This work establishes a systems-based method to tune ROS production in bacteria and demonstrates that increased microbial ROS production can potentiate killing by oxidants and antibiotics.
Published Version: doi:10.1038/nbt.2458
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3568245/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11855791
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