CCY-1a-E2 induces G2/M phase arrest and apoptotic cell death in HL-60 leukemia cells through cyclin-dependent kinase 1 signaling and the mitochondria-dependent caspase pathway

Lin,Chin‑Fen; Yang,Jai‑Sing; Lin,Chingju; Tsai,Fuu‑Jen; Lu,Chi‑Cheng; Lee,Miau‑Rong

doi:10.3892/or.2016.4970

CCY-1a-E2 induces G2/M phase arrest and apoptotic cell death in HL-60 leukemia cells through cyclin-dependent kinase 1 signaling and the mitochondria-dependent caspase pathway

Authors:
- Chin‑Fen Lin
- Jai‑Sing Yang
- Chingju Lin
- Fuu‑Jen Tsai
- Chi‑Cheng Lu
- Miau‑Rong Lee
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Affiliations: Department of Biochemistry, China Medical University, Taichung 404, Taiwan, R.O.C., Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404, Taiwan, R.O.C., Department of Physiology, China Medical University, Taichung 404, Taiwan, R.O.C., Human Genetic Center, China Medical University Hospital, Taichung 404, Taiwan, R.O.C., School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110, Taiwan, R.O.C.
Published online on: July 25, 2016 https://doi.org/10.3892/or.2016.4970
Pages: 1633-1639

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Abstract

Our previous study demonstrated that 2-[(3-methoxybenzyl)oxy]benzaldehyde (CCY-1a-E2) is a potent compound that acts against multiple human leukemia cell lines. CCY-1a-E2 was also shown to have efficacious anti‑leukemic activity in vivo. However, the molecular mechanism of action of CCY‑1a‑E2 attributed to its anticancer effect remains poorly understood. In the present study, CCY‑1a‑E2 suppressed cell viability in multiple leukemia cell lines (HL‑60, K562, KG‑1 and KG‑1a) via inhibition of cell proliferation, cell cycle arrest and induction of apoptosis. CCY‑1a‑E2 exhibited a marked toxic effect on HL‑60 cells and displayed low cytotoxicity in normal human peripheral blood mononuclear cells (PBMCs). Results from flow cytometric analysis indicated that CCY‑1a‑E2 promoted G2/M phase arrest and promoted apoptosis in the HL‑60 cells. CCY‑1a‑E2 treatment upregulated cyclin B, cyclin‑dependent kinase 1 (CDK1), cell division cycle 25C (cdc25C) and p21 protein expression. CCY‑1a‑E2 caused apoptotic cell death and DNA fragmentation as determined by 4',6‑diamidino‑2‑phenylindole (DAPI) staining and DNA gel electrophoresis. Elevated activities of caspase‑8, ‑9 and ‑3 were observed during CCY‑1a‑E2‑induced cell apoptosis; their specific inhibitors were found to block CCY‑1a‑E2‑induced apoptosis, respectively. Moreover, CCY‑1a‑E2 time‑dependently disrupted the mitochondrial membrane potential (ΔΨm), and it enhanced the protein levels of Fas/CD95, cytochrome c, Bax, cleaved PARP, as well as attenuated Bcl‑2 expression in the HL‑60 cells. Our results provide direct evidence that supports the future potential therapeutic application of CCY-1a-E2 in leukemia.

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