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Related Experiment Videos

Differential selective toxicity of DMS-aureofacin components.

B Malewicz, E Borowski, H M Jenkin

    The Journal of Antibiotics
    |November 1, 1981
    PubMed
    Summary

    Trimethylammonium methyl esters (DMS) of polyene macrolides were studied for their membrane permeability effects. DMS-aureofacins B and E showed differential toxicity, offering potential for targeted antimicrobial therapies.

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    Area of Science:

    • Biochemistry
    • Pharmacology
    • Microbiology

    Background:

    • Polyene macrolides are native antibiotics with potential therapeutic applications.
    • Methylation of polyene macrolides with dimethyl sulfate yields trimethylammonium methyl esters (DMS), altering their properties.
    • Understanding the differential activity and toxicity of DMS derivatives is crucial for developing targeted therapies.

    Purpose of the Study:

    • To isolate and characterize individual components of the DMS-aureofacin complex.
    • To evaluate the toxicity and membrane permeability-inducing activity of these components.
    • To assess the selective toxicity of DMS-aureofacin components against yeast and mammalian cells.

    Main Methods:

    • Isolation of DMS-aureofacin complex components using thin-layer chromatography on polygram cellulose plates.
    • Characterization of biological activity and toxicity of isolated components.
    • Comparative assessment of selective toxicity between yeast and mammalian cells in culture.

    Main Results:

    • The DMS-aureofacin complex comprised five separable components.
    • DMS-aureofacin A (90%) exhibited poor selective toxicity.
    • DMS-aureofacin B (6%) showed higher activity against mammalian cells, while DMS-aureofacin E (4%) was more active against yeast cells, indicating differential selective toxicity.

    Conclusions:

    • DMS-aureofacin B and E possess distinct selective toxicities, suggesting potential for targeted applications.
    • Further investigation into DMS-aureofacin B and E could lead to novel antimicrobial agents with improved therapeutic indices.
    • DMS-aureofacins C and D were present in insufficient quantities for biological characterization.

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