Effect of primycin on growth-arrested cultures and cell integrity of staphylococcus aureus

Péter Feiszt, G. Schneider, L. Emődy

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Bactericidal effect against non-dividing bacteria is a very advantageous, but rare characteristic among antimicrobial agents, mostly possessed by those affecting the cell membrane. These kinds of agents can kill bacterial cells without lysis. We assessed these characteristics on primycin, a topical anti-staphylococcal agent highly effective against prevalent multiresistant strains, as it also acts on the cell membrane. In time-kill studies, primycin preserved its bactericidal activity against growth-arrested Staphylococcus aureus cultures. The bactericidal action was slower against growth-arrested cultures compared to the exponentially growing ones to different extents depending on the manner of arrest. The bactericidal effect was less influenced by stringent response and by protein synthesis inhibition, proving that it does not depend on metabolic activity. In contrast, uncoupling of the membrane potential predominantly slowed, and low temperature almost stopped killing of bacteria. In consideration of published data, these facts suggest that the antibacterial action of primycin involves disrupting of the membrane potential, and is predominantly influenced by the membrane fluidity. Optical density measurements and transmission electron microscopy verified that primycin kills bacterial cells without lysis. These results reveal favorable characteristics of primycin and point to, and broaden the knowledge on its membranetargeted effect.

Original languageEnglish
Pages (from-to)121-130
Number of pages10
JournalActa Microbiologica et Immunologica Hungarica
Volume64
Issue number2
DOIs
Publication statusPublished - Jun 1 2017

Fingerprint

Staphylococcus aureus
Cell Culture Techniques
Growth
Membrane Potentials
Cell Membrane
Bacteria
Membrane Fluidity
Anti-Infective Agents
Transmission Electron Microscopy
primycin
Temperature
Proteins

Keywords

  • Growth arrest
  • No bacteriolysis
  • Primycin
  • Staphylococcus aureus
  • TEM
  • Time-kill

ASJC Scopus subject areas

  • Immunology and Microbiology(all)

Cite this

Effect of primycin on growth-arrested cultures and cell integrity of staphylococcus aureus. / Feiszt, Péter; Schneider, G.; Emődy, L.

In: Acta Microbiologica et Immunologica Hungarica, Vol. 64, No. 2, 01.06.2017, p. 121-130.

Research output: Contribution to journalArticle

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