Penetration through Outer Membrane and Efflux Potential in Pseudomonas aeruginosa of Bulgecin A as an Adjuvant to β-Lactam Antibiotics

Choon Kim, Shusuke Tomoshige, Mijoon Lee, Helen I. Zgurskaya, Shahriar Mobashery

研究成果: Article査読

抄録

The treatment of infections by Gram-negative bacteria remains a difficult clinical challenge. In the light of the dearth of discovery of novel antibiotics, one strategy that is being explored is the use of adjuvants to enhance antibacterial activities of existing antibiotics. One such adjuvant is bulgecin A, which allows for the lowering of minimal-inhibitory concentrations for β-lactam antibiotics. We have shown that bulgecin A inhibits three of the pseudomonal lytic transglycosylases in its mode of action, yet high concentrations are needed for potentiation activity. Herein, we document that bulgecin A is not a substrate for pseudomonal efflux pumps, whose functions could have been a culprit in the need for high concentrations. We present evidence that the penetration barrier into the periplasm is at the root of the need for high concentrations of bulgecin A in its potentiation of β-lactam antibiotics.

本文言語English
論文番号358
ジャーナルAntibiotics
12
2
DOI
出版ステータスPublished - 2023 2月

ASJC Scopus subject areas

  • 微生物学
  • 生化学
  • 薬理学、毒性学および薬学(全般)
  • 微生物学(医療)
  • 感染症
  • 薬理学(医学)

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