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Micafungin-Induced Suicidal Erythrocyte Death.
Thomas Peter1, Rosi Bissinger, Elena Signoretto
1Departments of Cardiology, Cardiovascular Medicine and Physiology, Eberhard-Karls-University of Tuebingen, Tuebingen, Germany.
Summary
The antifungal drug Micafungin triggers red blood cell death (eryptosis) and hemolysis. This process involves cell shrinkage and membrane changes, potentially contributing to thrombosis side effects.
Area of Science:
- Hematology
- Pharmacology
- Cell Biology
Background:
- Micafungin is an antifungal medication used for candidiasis and aspergillosis.
- Side effects include hemolytic anemia and thrombosis, possibly linked to eryptosis (erythrocyte suicidal death).
- Eryptosis is induced by increased calcium, oxidative stress, ceramide, kinases, and caspases.
Purpose of the Study:
- To investigate if Micafungin induces eryptosis in human erythrocytes.
Main Methods:
- Flow cytometry assessed phosphatidylserine externalization, cell volume, intracellular calcium, reactive oxygen species (ROS), and ceramide.
- Hemolysis was measured by hemoglobin in the supernatant.
Main Results:
- Micafungin (10-25 µg/ml) increased hemolysis and phosphatidylserine binding, decreasing cell volume.
- Micafungin did not significantly alter intracellular calcium, ROS, or ceramide levels.
- Inhibitors of PKC, p38, casein kinase 1α, and caspases did not affect Micafungin-induced phosphatidylserine binding.
Conclusions:
- Micafungin induces erythrocyte hemolysis and eryptosis.
- Eryptosis is characterized by cell shrinkage and phospholipid scrambling of the erythrocyte membrane.
