Journal of International Oncology ›› 2014, Vol. 41 ›› Issue (5): 371-375.doi: 10.3760/cma.j.issn.1673-422X.2014.05.016

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Induction of apoptosis by osthole in HL-60 cells and the molecular mechanism research

Wang Yan, Jiang Guosheng, Ren Xia, Huang Ning, Bi Kehong   

  1. School of Medicine and Life Sciences, University of Ji′nan-Shandong Academy of Medical Sciences, Ji′nan 250062 , China
  • Received:2014-01-13 Revised:2014-03-05 Online:2014-05-08 Published:2014-04-28
  • Contact: Bi Kehong E-mail:bikehong11@163.com

Abstract: Objective To detect the effect of osthole on proliferation and apoptosis of HL-60 cells and its molecular mechanism. Methods HL-60 cells proliferation was measured through the CCK8 assay method. The cell morphological changes were observed by Hoechst33342 staining after 8 h of drug effect. Induction of apoptosis was determined by flow cytometry and fluorescent microscopy. Expressions of Bcl-2 and Bax mRNA were evaluated by RT-PCR, and the expressions of cleaved caspase-3, caspase-8, caspase-9, Fas and FasL were evaluated  by using western bolt assay. Results Osthole could inhibit the proliferation of HL-60 cells, the maximum inhibiting rate was (90.7±4.5)%, F=138.46, P=0.000; the apoptosis rate was 33.6%, F=27.75, P=0.006. The changes of apoptosis of cells and nucleus were shown in cell morphological observation. Osthole affected the decrease of the mRNA levels of Bcl-2 and the increase of the Bax mRNA levels via a dosedependent manner(F=210.12, P=0.000). Western blotting demonstrated that osthole could lead to the increase of the expression levels of cleaved caspase-3, caspase-8, caspase-9, Fas and FasL in the HL-60 cell line via a timedependent manner. Conclusion Data suggests that osthole inhibits proliferation and induces apoptosis of HL-60 cells through mitochondriadependent pathway and deathreceptor pathway.

Key words: Osthole, Leukemia, Apoptosis