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Adriamycin-plasma membrane interaction in human erythrocytes.
G Arancia1, A Molinari, P Crateri
1Department of Ultrastructures, Istituto Superiore di Sanità, Rome, Italy.
European Journal of Cell Biology
|December 1, 1988
Summary
Adriamycin (ADR) alters red blood cell membranes by affecting intramembrane particle distribution and cell shape. These changes suggest ADR incorporates into the lipid bilayer, not through lipid peroxidation.
Area of Science:
- Cell Biology
- Pharmacology
- Biochemistry
Background:
- The cell membrane is a key target for Adriamycin (ADR).
- The precise mechanism of ADR's cytotoxic action via plasma membrane interaction remains unclear.
Purpose of the Study:
- To investigate the interaction of Adriamycin (ADR) with red blood cell membranes.
- To elucidate the mechanism of ADR-induced cytotoxicity at the plasma membrane level.
Main Methods:
- Freeze-fracturing (FF) to analyze membrane ultrastructure.
- Scanning electron microscopy (SEM) for morphological assessment.
- Experiments with radical scavengers and oxidants to assess lipid peroxidation.
Main Results:
- Adriamycin (ADR) induced dose-dependent modifications in intramembrane particle (IMP) distribution.
- SEM revealed discocyte-stomatocyte transition and mottled cell formation with ADR treatment.
- Observed changes were independent of lipid peroxidation.
Conclusions:
- Adriamycin (ADR) interacts with the erythrocyte plasma membrane.
- Evidence suggests ADR incorporates into the lipid bilayer, rather than causing protein segregation or lipid peroxidation.