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Table of Contents
Vol. 22, No. 5-6, 2008
Issue release date: December 2008
Section title: Original Paper
Cell Physiol Biochem 2008;22:431–440

Cell Growth Inhibition, G2/M Cell Cycle Arrest, and Apoptosis Induced by Chloroquine in Human Breast Cancer Cell Line Bcap-37

Jiang P.-D.* · Zhao Y.-L.* · Shi W.* · Deng X.-Q.* · Xie G.* · Mao Y.-Q.* · Li Z.-G.* · Zheng Y.-Z.* · Yang S.-Y.* · Wei Y.-Q.*
State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan,*P.-D. Jiang and Y.-L. Zhao contributed equally to this work
email Corresponding Author

Ying-lan Zhao

State Key Lab of Biotherapy and Cancer Center, West China Hospital,

Sichuan University, #1 Keyuan Road 4, Gaopeng Street, High Technological

Development Zone, Chengdu, Sichuan, 610041 (the People’s Republic of China)

Tel. + 86-28-85164063, Fax: + 86-28-85164060, E-Mail alancenxb@sina.com.cn

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Chloroquine is an antimalarial drug that has been used in the treatment and prophylaxis of malaria since the 1950s. The present study was undertaken to examine the effects of chloroquine on Bcap-37 human breast cancer cells’ growth, cell cycle modulation, apoptosis induction, and associated molecular alterations in vitro. The chloroquine treatment decreased the viability of Bcap-37 cells in a concentration- and time-dependent manner, which correlated with G2/M phase cell cycle arrest. The chloroquine-mediated cell cycle arrest was associated with a decrease in protein levels/activity of polo-like kinase 1 (Plk1), phosphorylated cell division cycle 25C (Cdc25C), phosphorylated extracellular signal-regulated kinase 1/2 (ERK1/2), phosphorylated Akt. The chloroquine-treated Bcap-37 cells exhibited a marked decrease in the level of mitochondrial transmembrane potential (ΔΨm), which was accompanied by the activation of caspase-3 and cleaved poly(ADP-ribose) polymerase (PARP). Exposure of Bcap-37 cells to chloroquine also resulted in the induction of spindle abnormalities. In conclusion, the findings in this study suggested that chloroquine might have potential anticancer efficacy, which could be attributed, in part, to its proliferation inhibition and apoptosis induction of cancer cells through modulation of apoptosis and cell cycle-related proteins expressions, down-regulation of mitochondrial transmembrane potential (ΔΨm), and induction of spindle abnormalities.

© 2008 S. Karger AG, Basel

Article / Publication Details

First-Page Preview
Abstract of Original Paper

Accepted: September 02, 2008
Published online: December 09, 2008
Issue release date: December 2008

Number of Print Pages: 10
Number of Figures: 0
Number of Tables: 0

ISSN: 1015-8987 (Print)
eISSN: 1421-9778 (Online)

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