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Fine structural alterations induced in erythocytes by phorbol myristate acetate
The American Journal of Pathology
|June 1, 1978
Summary
Phorbol 12-myristate 13-acetate (PMA) transforms red blood cells into stomatocytes and stomatospherocytes. These membrane shape changes are concentration-dependent and optimal at 37°C, suggesting a fundamental mechanism of PMA action.
Area of Science:
- Hematology
- Cell Biology
- Biochemistry
Background:
- Phorbol 12-myristate 13-acetate (PMA) is a known membrane-active agent.
- Previous studies show PMA induces vacuole formation in neutrophils and granule release in platelets.
Purpose of the Study:
- To investigate the effects of PMA on red blood cells (erythrocytes).
- To characterize the morphological changes induced by PMA in erythrocytes.
Main Methods:
- Erythrocytes were exposed to varying concentrations of PMA.
- Experiments were conducted with and without plasma.
- Incubation was performed at different temperatures, with a focus on 37°C.
Main Results:
- PMA induced significant morphological changes in erythrocytes.
- Erythrocytes were converted into stomatocytes and stomatospherocytes.
- The effects were concentration-dependent, required plasma removal, and were maximal at 37°C.
Conclusions:
- PMA exerts a marked effect on red blood cells, altering their morphology.
- The observed changes in erythrocytes share similarities with effects on other blood cells.
- Membrane invagination is suggested as a fundamental mechanism underlying PMA's action across different cell types.