Abstract
Alterations in gene expression during apoptosis in HL-60 cells were identified by a cDNA based array analysis. Apoptosis was induced in the human promyelocytic leukemia cell line, HL-60, by incubation with 30 μM etoposide for 5 hours. Changes in gene expression occurring during apoptosis in these cells were detected using the “ATLAS cDNA Expression Array” technique. 40 genes were identified as differentially expressed in the apoptotic cells by at least a factor of two. 30 of these genes were down-regulated during apoptosis. Many of the down-regulated genes reflected decreased proliferative activity in the cells as well as decreased activity of survival pathways. Most of the genes, which were up-regulated during apoptosis, were genes involved in pathways leading to cell death and suppression of proliferation. Based on the up-regulations observed at the mRNA level, it is speculated that etoposide-induced apoptosis in the HL-60 cells proceeds via pathways involving factors such as TNFα, IGFBP3, SAPK1, AP-1 and GADD153/CHOP10. Four genes, which showed changes at the mRNA level, were also analyzed by Western blotting in order to confirm the observed differences at the protein level.
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Bjørling-Poulsen, M., Issinger, OG. cDNA array analysis of alterations in gene expression in the promyelocytic leukemia cell line, HL-60, after apoptosis induction with etoposide. Apoptosis 8, 377–388 (2003). https://doi.org/10.1023/A:1024177119658
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DOI: https://doi.org/10.1023/A:1024177119658