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Erythrocyte hemolysis by radiofrequency fields.

S F Cleary, L M Liu, F Garber

    Bioelectromagnetics
    |January 1, 1985
    PubMed
    Summary

    Continuous-wave radiofrequency (RF) exposure caused hemolysis in rabbit red blood cells in vitro, independent of heating. This RF radiation effect differs from microwave radiation effects on red blood cells.

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    Area of Science:

    • Biophysics
    • Cell Biology
    • Electromagnetics

    Background:

    • In vitro studies have shown that continuous-wave radiofrequency (RF) exposure can induce a field-strength-dependent hemolytic effect.
    • Erythrocytes, or red blood cells, are susceptible to various environmental stressors, including electromagnetic fields.

    Purpose of the Study:

    • To investigate the hemolytic effects of continuous-wave radiofrequency (RF) exposure on erythrocytes in vitro.
    • To determine the relationship between RF field strength, frequency, and the extent of hemolysis.
    • To explore potential mechanisms underlying RF-induced red blood cell lysis, excluding thermal effects.

    Main Methods:

    • Whole heparinized rabbit blood was exposed to 50-, 100-, or 10-MHz RF fields at specific field strengths (greater than 4 V/cm or 9 V/cm) for 2 hours.
    • Sample temperatures were strictly controlled at 22.5 ± 0.2°C to rule out thermal artifacts.
    • Hemolysis was assessed, and cellular concentrations of potassium (K+) and sodium (Na+), as well as pH, were measured.

    Main Results:

    • Hemolysis was observed at RF field strengths exceeding 4 V/cm for 50- and 100-MHz fields, and 9 V/cm for 10-MHz fields.
    • The observed hemolytic effect was not attributable to heating or temperature gradients, as sample temperatures remained constant.
    • No significant changes in cellular K+, Na+, or pH were detected, indicating the effect was not due to ion imbalance.

    Conclusions:

    • Continuous-wave RF radiation can induce hemolysis in erythrocytes in vitro, independent of thermal effects.
    • The mechanism likely involves irreversible alterations in plasma membrane permeability, potentially affecting a subpopulation of sensitive cells (e.g., aged cells), leading to osmotic lysis.
    • RF radiation at these frequencies impacts red blood cells differently compared to microwave radiation.

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