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Journal of Biomedicine and Biotechnology
Volume 2011 (2011), Article ID 419343, 8 pages
http://dx.doi.org/10.1155/2011/419343
Research Article

Ursolic Acid Inhibits Proliferation and Induces Apoptosis of Cancer Cells In Vitro and In Vivo

1PET-CT Center, The Affiliated Hospital of Inner Mongolia Medical College, TongDao North Street, Hohhot 010050, China
2Clinical Medical Research Center of the Affiliated Hospital, Inner Mongolia Medical College, TongDao North Street, Hohhot 010050, China
3Department of Medical Education, The Affiliated People's Hospital of Inner Mongolia Medical College, Zhaoruda Street, Hohhot 010010, China

Received 30 December 2010; Revised 22 March 2011; Accepted 4 April 2011

Academic Editor: David J. Yang

Copyright © 2011 Xuemei Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aims of the study are to explore the effect of ursolic acid (UA) on the growth of gastric cancer cell line BGC-803 and hepatocellular cancer cell H22 xenograft and to understand the mechanism. UA inhibits growth of BGC-803 cells in vitro in dose-dependent and time-dependent manner. Treated with UA in vivo, tumor cells can be arrested to G0/G1 stage. The apoptotic rate was significantly increased in tumor cells treated with UA both in vitro and in vivo. DNA fragmentation was found in BGC-803 cells exposed to UA. UA activated caspase-3, -8, and -9 and down regulated expression of Bcl-2 in BGC-803 cells. The expression of caspase-3 and -8 was elevated in tumor cells from xenograft treated with UA. 18F-FLT PET-CT imaging confirmed tumor model and UA effectiveness. Our results indicated that UA inhibits growth of tumor cells both in vitro and in vivo by decreasing proliferation of cells and inducing apoptosis.