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Related Experiment Videos

Sonodynamically-induced in vitro cell damage enhanced by adriamycin

S Umemura1, N Yumita, Y Okano

  • 1Central Research Laboratory, Hitachi, Ltd., Kokubunnji, Tokyo, Japan.

Cancer Letters
|May 7, 1998
PubMed
Summary

Adriamycin (ADM) enhances ultrasound-induced cell damage and active oxygen generation. This damage is linked to active oxygen, as shown by suppressed effects with histidine.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Pharmacology

Background:

  • Adriamycin (ADM) is an anticancer drug.
  • Ultrasound can induce cell damage and generate reactive oxygen species.
  • The interaction between ADM, ultrasound, and cell damage is not fully understood.

Purpose of the Study:

  • To investigate the synergistic effect of adriamycin (ADM) and ultrasound on cell damage.
  • To explore the role of active oxygen generation in ADM-enhanced sonodynamic cell damage.
  • To compare the rates of cell damage and active oxygen generation under sonodynamic conditions with ADM.

Main Methods:

  • In vitro sonodynamic experiments using a standardized insonation setup.
  • Exposure of cells to varying concentrations of adriamycin (40-160 microM).

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  • Measurement of cell damage and nitroxide generation rates.
  • Inhibition studies using 10 mM histidine.

    • Main Results:

    • ADM significantly enhanced both ultrasonically-induced cell damage and nitroxide generation.
    • The rates of cell damage and nitroxide generation showed a strong correlation (R > 0.99).
    • Histidine suppressed the enhancement of both cell damage and nitroxide generation.

    Conclusions:

    • Ultrasonically-generated active oxygen is a key factor in ADM-enhanced sonodynamic cell damage.
    • ADM potentiation of ultrasound-induced cell damage is mediated by reactive oxygen species.
    • These findings support the use of sonodynamic therapy with ADM for targeted cancer treatment.