Abstract
Antimicrobials targeting cell wall biosynthesis are generally considered inactive against nonreplicating bacteria. Paradoxically, we found that under nonpermissive growth conditions, exposure of Mycobacterium bovis BCG bacilli to such antimicrobials enhanced their survival. We identified a transcriptional regulator, RaaS (for regulator of antimicrobial-assisted survival), encoded by bcg1279 (rv1219c) as being responsible for the observed phenomenon. Induction of this transcriptional regulator resulted in reduced expression of specific ATP-dependent efflux pumps and promoted long-term survival of mycobacteria, while its deletion accelerated bacterial death under nonpermissive growth conditions in vitro and during macrophage or mouse infection. These findings have implications for the design of antimicrobial drug combination therapies for persistent infectious diseases, such as tuberculosis.
| Original language | English |
|---|---|
| Pages (from-to) | 2798-2806 |
| Number of pages | 9 |
| Journal | Antimicrobial Agents and Chemotherapy |
| Volume | 58 |
| Issue number | 5 |
| Early online date | 10 Apr 2014 |
| DOIs | |
| Publication status | Published - May 2014 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Keywords
- Animals
- Anti-Infective Agents
- Cell Line
- Electrophoretic Mobility Shift Assay
- Fluorescence Polarization
- Humans
- Mice
- Mycobacterium bovis
- Mycobacterium tuberculosis
- Journal Article
- Research Support, Non-U.S. Gov't
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Bernard Burke
- Centre for Discoveries in Life Sciences - Associate Professor
Person: Teaching and Research
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