Summary
Erythroid differentiation of human leukemic K 562 cells is inhibited by the iron chelator desferrioxamine (DF). In addition, desferrioxamine induces an increase of uptake of hemin. When hemin is added to the culture medium, the DF-mediated inhibitory effects on erythroid induction are reversed. Briefly, hemin allows hemoglobin synthesis by K 562 cells induced to erythroid differentiation by 1-β-D-arabinofuranosylcytosine (ara-C) and treated with 12.5 μg/ml DF. In addition, it was found that hemin treatment leads to a reversion of inhibition of K 562 cell proliferation mediated by 50–75 μg/ml DF. This effect of hemin was also detected in other cultured human tumor cell lines (B-lymphoid, erythroleukemic and from breast carcinomas, melanomas and kidney carcinomas).
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Feriotto, G., Nastruzzi, C., Barbieri, R. et al. Induction to erythroid differentiation of K 562 cells by 1-β-D-arabinofuranosylcytosine is inhibited by iron chelators: reversion by treatment with hemin. Blut 57, 25–30 (1988). https://doi.org/10.1007/BF00320631
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DOI: https://doi.org/10.1007/BF00320631