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- Title
Unexpected link between an antibiotic, pannexin channels and apoptosis.
- Authors
Poon, Ivan K. H.; Chiu, Yu-Hsin; Armstrong, Allison J.; Kinchen, Jason M.; Juncadella, Ignacio J.; Bayliss, Douglas A.; Ravichandran, Kodi S.
- Abstract
Plasma membrane pannexin 1 channels (PANX1) release nucleotide find-me signals from apoptotic cells to attract phagocytes. Here we show that the quinolone antibiotic trovafloxacin is a novel PANX1 inhibitor, by using a small-molecule screen. Although quinolones are widely used to treat bacterial infections, some quinolones have unexplained side effects, including deaths among children. PANX1 is a direct target of trovafloxacin at drug concentrations seen in human plasma, and its inhibition led to dysregulated fragmentation of apoptotic cells. Genetic loss of PANX1 phenocopied trovafloxacin effects, revealing a non-redundant role for pannexin channels in regulating cellular disassembly during apoptosis. Increase in drug-resistant bacteria worldwide and the dearth of new antibiotics is a major human health challenge. Comparing different quinolone antibiotics suggests that certain structural features may contribute to PANX1 blockade. These data identify a novel linkage between an antibiotic, pannexin channels and cellular integrity, and suggest that re-engineering certain quinolones might help develop newer antibacterials.
- Subjects
PHYSIOLOGICAL effects of antibiotics; PANNEXINS; APOPTOSIS; TROVAFLOXACIN; QUINOLONE antibacterial agents; DRUG side effects
- Publication
Nature, 2014, Vol 507, Issue 7492, p329
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/nature13147