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Basolateral membrane ionic conductance in frog skin.

W Nagel

    Pflugers Archiv : European Journal of Physiology
    |January 1, 1985
    PubMed
    Summary
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    Frog skin

    Area of Science:

    • Physiology
    • Membrane Biophysics

    Background:

    • The basolateral membrane of frog skin plays a crucial role in ion transport.
    • Understanding its electrical properties is key to comprehending overall skin function.

    Purpose of the Study:

    • To determine the basolateral membrane resistance of frog skin using equivalent circuit analysis.
    • To investigate the non-linear current-voltage (I/V) relationships and identify potential ion channel behavior.

    Main Methods:

    • Standard equivalent circuit analysis was employed to model the basolateral membrane.
    • Experimental perturbations involved varying amiloride concentrations and serosal Ba2+ application.
    • Current-voltage (I/V) relationships were systematically measured.

    Main Results:

    Related Experiment Videos

    • Equivalent circuit analysis yielded inconsistent results depending on the formal approach used.
    • Basolateral membrane resistance exhibited pronounced non-linearity, decreasing with hyperpolarization.
    • The I/V relationship shape was altered by amiloride and Ba2+, suggesting specific ion channel involvement.

    Conclusions:

    • The study highlights inconsistencies in basolateral membrane resistance calculations for frog skin.
    • Observed non-linear I/V relationships suggest the presence of inward or anomalous rectification in potassium channels.
    • Further research is needed to resolve analytical discrepancies and fully elucidate basolateral membrane channel function.