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Influence of spermine on some membrane-disturbing actions

J G Elferink

    Zeitschrift Fur Naturforschung. Section C, Biosciences
    |January 1, 1975
    PubMed

    Insights

    Spermine affects potassium loss in yeast cells disrupted by membrane-active agents. It protects against positively charged compounds and enhances the effect of negatively charged ones.

    Area of Science:

    • Cell biology
    • Biochemistry
    • Biophysics

    Background:

    • Yeast cells are model organisms for studying membrane transport.
    • Polyamines like spermine play crucial roles in cellular processes.
    • Membrane-active agents can disrupt cellular integrity and ion homeostasis.

    Purpose of the Study:

    • To investigate the influence of spermine on potassium loss from yeast cells.
    • To understand how spermine modulates the effects of membrane-disrupting agents on yeast cells.

    Main Methods:

    • Yeast cell cultures were treated with various membrane-active agents.
    • Potassium ion efflux was measured in the presence and absence of spermine.
    • The effects of spermine on interactions with charged compounds were analyzed.

    Main Results:

    • Spermine significantly interfered with the potassium loss induced by membrane-active bactericides.
    • Spermine exhibited protective effects against the positively charged compound parasosaniline.
    • Spermine strongly potentiated the action of the negatively charged compound sodium dodecyl sulfate.

    Conclusions:

    • Spermine modulates the permeability of yeast cell membranes to potassium ions.
    • Spermine's interaction with charged molecules influences its protective and potentiating effects.
    • These findings highlight spermine's role in maintaining cellular ion balance against membrane disturbances.

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