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Updated: Feb 20, 2026
Modeling Chemotherapy Resistant Leukemia In Vitro
Published on: February 9, 2016
Comparison of In Vitro Antileukemic Activity of 4-Hydroperoxyifosfamide and 4-Hydroperoxycyclophosphamide
Malgorzata Opydo-Chanek1, Katarzyna Śladowska1, Kamil Blicharski1
1Department of Experimental Hematology, Jagiellonian University in Krakow, Krakow, Poland.
Background/Aim:
The oxazaphosphorines, ifosfamide and cyclophosphamide, represent a class of alkylating agents. The aim of the present in vitro study was to compare antileukemic activity of 4-hydroperoxyifosfamide (4-OOH-IF) and 4-hydroperoxycyclophosphamide (4-OOH-CP).
Materials And Methods:
The experiments were performed on MOLT-4 and ML-1 cells. The research was conducted using flow cytometry fluorescein diacetate/propidium iodide (PI), fluorescein-conjugated annexin V/PI, CaspGLOW Red Active Caspase-8 and -9, CellEvent™ Caspase-3/7 Green assays, and tetramethylrhodamine ethyl ester test.
Results:
4-OOH-IF and 4-OOH-CP distinctly reduced cell viability and triggered apoptosis and necrosis, causing changes in intracellular esterase activity, plasma membrane structure and integrity, caspase activation, and mitochondrial membrane potential. The oxazaphosphorines were responsible for the different antileukemic activities. 4-Hydroperoxyifosfamide appeared to be less cytotoxic against the leukemia cells than 4-hydroperoxycyclophosphamide. MOLT-4 cells were more sensitive to the action of the oxazaphosphorines than ML-1 cells.
Conclusion:
The findings provide a new insight on the mechanisms of cytotoxic action of 4-OOH-IF and 4-OOH-CP on the human acute lymphoblastic and myeloblastic leukemia cells.
