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[Rapid method for evaluating intra-erythrocyte Na+ activity].

R Antonicelli, G Coppa, M Piani

    Bollettino Della Societa Italiana Di Biologia Sperimentale
    |January 30, 1985
    PubMed
    Summary
    This summary is machine-generated.

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    This study measured intracellular sodium (Na+) activity in red blood cells using a novel ion-selective electrode method. The findings establish reference intervals for healthy individuals, crucial for understanding cellular sodium balance.

    Area of Science:

    • Biochemistry
    • Analytical Chemistry
    • Hematology

    Context:

    • Accurate intracellular sodium (Na+) activity measurement is vital for physiological studies.
    • Existing methods can be complex and prone to matrix effects.
    • Red blood cells serve as a model for cellular ion transport.

    Purpose:

    • To develop and validate a simplified method for measuring intracellular sodium (Na+) activity in human erythrocytes.
    • To establish reference intervals for intracellular sodium (Na+) activity in a healthy population.

    Summary:

    • Intracellular sodium (Na+) activity was measured in washed human erythrocytes using an ultrasound-lysing technique followed by indirect potentiometric measurement with an ion-selective electrode.
    • This method eliminates manual "pipetting" steps, reducing potential errors and matrix interference.

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  • Reference intervals for healthy individuals were determined to be 7.3 ± 0.6 mmol/l.

    • Impact:

    • Provides a more robust and streamlined assay for intracellular sodium (Na+) activity.
    • Facilitates research into conditions involving altered sodium transport and cellular homeostasis.
    • Establishes essential reference values for clinical diagnostics and research applications.