Int. J. Mol. Sci. 2008, 9(11), 2265-2277; doi:10.3390/ijms9112265
Article

Ponicidin Inhibits Monocytic Leukemia Cell Growth by Induction of Apoptosis

1 Department of Hematology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, P.R. China 2 Department of Nuclear Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, P.R. China 3 Department of Traditional Chinese Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, P.R. China
* Author to whom correspondence should be addressed.
Received: 23 September 2008; in revised form: 25 October 2008 / Accepted: 7 November 2008 / Published: 19 November 2008
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
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Abstract: In this study two monocytic leukemia cell lines, U937 and THP-1 cells, were used to investigate the anti-proliferation effects caused by ponicidin. Cell viability was measured by an MTT assay. Cell apoptosis was assessed by flow cytometry as well as DNA fragmentation analysis. Cell morphology was observed using an inverted microscope and Hoechst 33258 staining. RT-PCR and Western blot analysis were used to detect survivin as well as Bax and Bcl-2 expressions after the cells were treated with different concentrations of ponicidin. The results revealed that ponicidin could inhibit the growth of U937 and THP-1 cells significantly by induction of apoptosis. The suppression was in both time- and dose-dependent manner. Marked morphological changes of cell apoptosis were observed clearly after the cells were treated with ponicidin for 48~72 h. RT-PCR and Western blot analysis demonstrated that both survivin and Bcl-2 expressions were down-regulated remarkably while Bax expression remained constant before and after apoptosis occurred. We therefore conclude that ponicidin has significant anti-proliferation effects by inducing apoptosis on leukemia cells in vitro, downregulation of survivin as well as Bcl-2 expressions may be the important apoptosis inducing mechanisms. The results suggest that ponicidin may serve as potential therapeutic agent for leukemia.
Keywords: Ponicidin; Survivin; Bcl-2; Bax; Leukemia

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MDPI and ACS Style

Liu, J.-J.; Zhang, Y.; Guang, W.-B.; Yang, H.-Z.; Lin, D.-J.; Xiao, R.-Z. Ponicidin Inhibits Monocytic Leukemia Cell Growth by Induction of Apoptosis. Int. J. Mol. Sci. 2008, 9, 2265-2277.

AMA Style

Liu J-J, Zhang Y, Guang W-B, Yang H-Z, Lin D-J, Xiao R-Z. Ponicidin Inhibits Monocytic Leukemia Cell Growth by Induction of Apoptosis. International Journal of Molecular Sciences. 2008; 9(11):2265-2277.

Chicago/Turabian Style

Liu, Jia-Jun; Zhang, Yong; Guang, Wei-Bin; Yang, Hong-Zhi; Lin, Dong-Jun; Xiao, Ruo-Zhi. 2008. "Ponicidin Inhibits Monocytic Leukemia Cell Growth by Induction of Apoptosis." Int. J. Mol. Sci. 9, no. 11: 2265-2277.

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