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Polygodial, an antifungal potentiator.

I Kubo1, M Taniguchi

  • 1Division of Entomology and Parasitology, College of Natural Resources, University of California, Berkeley 94720.

Journal of Natural Products
|January 1, 1988
PubMed
Summary

Polygodial, a compound from medicinal plants, damages yeast cell membranes, acting as a potent fungicide. This membrane disruption enhances antibiotic efficacy by improving cellular entry, as seen with actinomycin D.

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Area of Science:

  • Natural Product Chemistry
  • Medicinal Botany
  • Cell Biology

Background:

  • Sesquiterpene dialdehydes isolated from Warburgia species exhibit antibiotic properties.
  • Polygodial demonstrates potent antifungal activity against Saccharomyces cerevisiae, Candida utilis, and Sclerotinia libertiana.
  • Polygodial acts as a fungicidal agent, causing significant damage to the cell membrane of S. cerevisiae.

Purpose of the Study:

  • To investigate the mechanism of polygodial's antifungal action.
  • To explore the potential of polygodial in enhancing the transmembrane transport of other chemicals.
  • To evaluate the combined efficacy of polygodial and actinomycin D.

Main Methods:

  • Isolation of sesquiterpene dialdehydes from Warburgia stuhlmannii and Warburgia ugandensis.
  • In vitro testing of polygodial's antifungal activity and its effect on Saccharomyces cerevisiae cell membranes.
  • Combination therapy experiments using polygodial and actinomycin D.

Main Results:

  • Polygodial exhibited the most potent antibiotic activity among the isolated sesquiterpene dialdehydes.
  • Treatment with polygodial caused severe damage to the S. cerevisiae cell membrane, leading to vesicle formation.
  • A combination of polygodial and actinomycin D demonstrated remarkably enhanced efficacy compared to actinomycin D alone.

Conclusions:

  • Polygodial's ability to disrupt cell membranes suggests its potential as a facilitator for transmembrane transport.
  • The findings support the hypothesis that polygodial can enhance the cellular uptake and efficacy of antibiotics with poor membrane permeability.
  • Polygodial may serve as a novel agent to overcome drug resistance mediated by cell membrane barriers.

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