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Broth Microdilution In Vitro Screening: An Easy and Fast Method to Detect New Antifungal Compounds
08:54

Broth Microdilution In Vitro Screening: An Easy and Fast Method to Detect New Antifungal Compounds

Published on: February 14, 2018

Target substances of some antifungal agents in the cell membrane

S Kuroda, J Uno, T Arai

    Antimicrobial Agents and Chemotherapy
    |March 1, 1978
    PubMed

    Insights

    Bacterial phospholipids, particularly those with unsaturated fatty acids, can reverse the antimicrobial effects of certain antifungal antibiotics like copiamycin and azalomycin F. This suggests shared cellular targets for these drugs.

    Area of Science:

    • Microbiology
    • Biochemistry
    • Pharmacology

    Background:

    • Copiamycin is an antifungal antibiotic with activity against some bacteria.
    • Sarcina lutea phospholipids were found to reverse copiamycin's antimicrobial activity.

    Purpose of the Study:

    • To investigate the reversing activity of Sarcina lutea phospholipids on antimicrobial agents.
    • To elucidate the mechanism of action and potential resistance pathways for antifungal drugs.

    Main Methods:

    • Extraction and fractionation of Sarcina lutea methanol extract.
    • Testing the effect of bacterial phospholipids and fatty acids on antibiotic activity.
    • Comparative analysis of phospholipid effects on different antifungal agents.

    Main Results:

    • Sarcina lutea phospholipids reversed the activity of copiamycin, azalomycin F, and miconazole, but not clotrimazole.
    • Phospholipids with unsaturated fatty acids and basic hydrophilic groups most effectively reversed copiamycin and azalomycin F activity.
    • Miconazole activity was affected by different phospholipids, while clotrimazole was unaffected.

    Conclusions:

    • Copiamycin and azalomycin F likely share identical cell membrane target sites.
    • Miconazole and clotrimazole appear to interact with different cell membrane sites compared to copiamycin and azalomycin F.

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