Journal
SCIENCE ADVANCES
Volume 7, Issue 35, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abh2037
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Funding
- Medical Scientist Training Program grant from the National Institute of General Medical Sciences of the National Institutes of Health [T32GM007739]
- National Institute of Allergy and Infectious Diseases of the National Institutes of Health [F30AI140623]
- National Defense Science and Engineering Graduate Fellowship from the U.S. Department of Defense
- Department of Infectious Disease at Imperial College London
- Potts Memorial Foundation
- European Commission Marie Sklodowska-Curie Actions Individual Fellowship
- Abby and Howard Milstein Program in Chemical Biology and Translational Medicine
- William Randolph Hearst Trust
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A critical challenge faced by microbiology and medicine is how to cure infections caused by bacteria that survive antibiotic treatment by persistence or tolerance. Research has found that even a single base change in a gene encoding a component of a metabolic pathway can confer multiple forms of resistance to multiple antibiotics with different targets. This extraordinary resilience may help explain why substerilizing exposure to one antibiotic in a regimen can induce resistance to others, and could lead to the development of drugs targeting the mediator of multiform resistance, WhiB7.
A critical challenge for microbiology and medicine is how to cure infections by bacteria that survive antibiotic treatment by persistence or tolerance. Seeking mechanisms behind such high survival, we developed a forward-genetic method for efficient isolation of high-survival mutants in any culturable bacterial species. We found that perturbation of an essential biosynthetic pathway (arginine biosynthesis) in a mycobacterium generated three distinct forms of resistance to diverse antibiotics, each mediated by induction of WhiB7: high persistence and tolerance to kanamycin, high survival upon exposure to rifampicin, and minimum inhibitory concentration-shifted resistance to clarithromycin. As little as one base change in a gene that encodes, a metabolic pathway component conferred multiple forms of resistance to multiple antibiotics with different targets. This extraordinary resilience may help explain how substerilizing exposure to one antibiotic in a regimen can induce resistance to others and invites development of drugs targeting the mediator of multiform resistance, WhiB7.
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