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Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection
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Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection

Published on: October 25, 2013

DCAP: a broad-spectrum antibiotic that targets the cytoplasmic membrane of bacteria

Ye-Jin Eun1, Marie H Foss, Daniela Kiekebusch

  • 1Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.

Journal of the American Chemical Society
|June 30, 2012
PubMed

Insights

A new broad-spectrum antibiotic, DCAP, effectively targets dormant and biofilm bacteria by disrupting their cell membranes. This offers a promising new treatment for persistent infections resistant to traditional antibiotics.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Drug Discovery

Background:

  • Persistent infections often involve slow-growing, biofilm-associated bacteria.
  • Conventional antibiotics requiring rapid cell growth are ineffective against these persistent microbes.
  • Membrane-targeting antibiotics show potential for combating slow-growing bacteria.

Purpose of the Study:

  • To introduce a novel membrane-active compound, DCAP.
  • To evaluate DCAP's efficacy against persistent and biofilm bacteria.
  • To assess DCAP's safety profile on mammalian cells.

Main Methods:

  • Synthesis and characterization of 2-((3-(3,6-dichloro-9H-carbazol-9-yl)-2-hydroxypropyl)amino)-2-(hydroxymethyl)propane-1,3-diol (DCAP).
  • Assessment of DCAP's effect on bacterial transmembrane potential and membrane protein localization (MinD, FtsA).
  • Testing DCAP's antimicrobial activity against nutrient-deprived bacteria and biofilms, and its cytotoxicity on red blood cells and mammalian cells.

Main Results:

  • DCAP demonstrated broad-spectrum antimicrobial activity against Gram-positive and Gram-negative bacteria.
  • DCAP reduced bacterial transmembrane potential and caused mislocalization of essential membrane proteins.
  • DCAP effectively killed nutrient-deprived bacteria, sterilized biofilms, and exhibited low mammalian cell toxicity.

Conclusions:

  • Membrane-active compounds like DCAP are a promising strategy for treating persistent bacterial infections.
  • DCAP represents a novel therapeutic small molecule with potential for broad-spectrum antimicrobial applications.
  • DCAP offers a new avenue for developing treatments against antibiotic-resistant and persistent infections.

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