Abstract
The phenolic metabolite of benzene, hydroquinone (HQ), has potential risks for hematological disorders and hematotoxicity in humans. Previous studies have revealed that reactive oxygen species, DNA methylation, and histone acetylation participate in benzene metabolites inhibiting erythroid differentiation in hemin-induced K562 cells. GATA1 and GATA2 are crucial erythroid-specific transcription factors that exhibit dynamic expression patterns during erythroid differentiation. We investigated the role of GATA factors in HQ-inhibited erythroid differentiation in K562 cells. When K562 cells were induced with 40 μM hemin for 0–120 h, the mRNA and protein levels of GATA1 and GATA2 changed dynamically. After exposure to 40 μM HQ for 72 h, K562 cells were induced with 40 μM hemin for 48 h. HQ considerably reduced the percentage of hemin-induced Hb-positive cells, decreased the GATA1 mRNA, protein, and occupancy levels at α-globin and β-globin gene clusters, and increased the GATA2 mRNA and protein levels significantly. ChIP-seq analysis revealed that HQ reduced GATA1 occupancy, and increased GATA2 occupancy at most gene loci in hemin-induced K562 cells. And GATA1 and GATA2 might play essential roles in the erythroid differentiation protein interaction network. These results elucidate that HQ decreases GATA1 occupancy and increases GATA2 occupancy at the erythroid gene loci, thereby downregulating GATA1 and upregulating GATA2 expression, which in turn modulates the expression of erythroid genes and inhibits erythroid differentiation. This partially explains the mechanism of benzene hematotoxicity.
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This work was supported by grants from National Natural Science Foundation of China (Project no. 81573192).
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Yu, CH., Yang, SQ., Zhang, YJ. et al. The role of GATA switch in benzene metabolite hydroquinone inhibiting erythroid differentiation in K562 cells. Arch Toxicol 97, 2169–2181 (2023). https://doi.org/10.1007/s00204-023-03541-0
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DOI: https://doi.org/10.1007/s00204-023-03541-0