Iron deprivation-induced apoptosis in HL-60 cells

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K Fukuchi1, S Tomoyasu, N Tsuruoka

  • 1Department of Clinical Pathology, School of Medicine, Showa University, Tokyo, Japan.

FEBS Letters
|August 15, 1994
PubMed

Insights

Iron deprivation using deferoxamine B mesylate (DFO) triggers apoptosis in HL-60 cells. Even short DFO exposure commits cells to DNA fragmentation and nuclear collapse, indicating programmed cell death.

Area of Science:

  • Cell Biology
  • Biochemistry
  • Pharmacology

Background:

  • Iron is essential for cell proliferation and survival.
  • Deferoxamine B mesylate (DFO) is an iron chelator used in treating iron overload.
  • Apoptosis, or programmed cell death, is a critical cellular process.

Purpose of the Study:

  • To investigate the effect of iron deprivation induced by DFO on HL-60 cell apoptosis.
  • To determine the concentration and time-dependent effects of DFO on apoptotic markers.

Main Methods:

  • HL-60 cells were treated with varying concentrations of DFO (10(-6) M and 10(-4) M).
  • Apoptosis was assessed using DNA fragmentation assays and flow cytometry (DNA histograms).
  • Morphological changes indicative of apoptosis, such as nuclear collapse and chromatin condensation, were observed microscopically.

Main Results:

  • Iron deprivation with DFO induced apoptosis in HL-60 cells.
  • DNA fragmentation was observed after 48 hours of treatment with 10(-6) M DFO.
  • Treatment with 10(-4) M DFO for 48 hours led to a peak in apoptosis, characterized by nuclear collapse.
  • Cells treated with 10(-4) M DFO for 24 hours showed commitment to apoptosis, with progressive chromatin condensation.

Conclusions:

  • Iron deprivation is a potent inducer of apoptosis in HL-60 cells.
  • DFO effectively triggers programmed cell death pathways, evidenced by DNA fragmentation and morphological changes.
  • The study highlights the role of iron in cell survival and provides insights into DFO's mechanism of action.

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