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Explore the Molecular Mechanism of Apoptosis Induced by Tanshinone IIA on Activated Rat
Hindawi Publishing Corporation
Evidence-Based Complementary and Alternative Medicine
Volume 2012, Article ID 734987, 15 pages
doi:10.1155/2012/734987
Research Article
Explore theMolecular Mechanism of Apoptosis Induced by
Tanshinone IIA on Activated Rat Hepatic Stellate Cells
Tai-Long Pan1, 2 and Pei-WenWang1
1 School of Traditional Chinese Medicine, Chang Gung University, Kweishan, Taoyuan 333, Taiwan
2Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University, Taoyuan 333, Taiwan
Correspondence should be addressed to Tai-Long Pan, pan@mail.cgu.edu.tw
Received 23 July 2012; Revised 28 November 2012; Accepted 7 December 2012
Academic Editor: Youn Chul Kim
Copyright ? 2012 T.-L. Pan and P.-W. Wang. 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.
Since the activated hepatic stellate cell (HSC) is the predominant event in the progression of liver fibrosis, selective clearance of HSC
should be a potential strategy in therapy. Salvia miltiorrhiza roots ethanol extract (SMEE) remarkably ameliorates liver fibrogenesis
in DMN-administrated rat model. Next, tanshinone IIA (Tan IIA), the major compound of SMEE, significantly inhibited rat HSC
viability and led to cell apoptosis. Proteome tools elucidated that increased prohibitin is involved in cell cycle arrest under Tan
IIA is the treatment while knockdown of prohibitin could attenuate Tan IIA-induced apoptosis. In addition, Tan IIA mediated
translocation of C-Raf which interacted with prohibitin activating MAPK and inhibiting AKT signaling in HSC. MAPK antagonist
suppressed ERK phosphorylation which was necessary for Tan IIA-induced expression of Bax and cytochrome c. PD98059 also
abolished Tan IIA-modulated cleavage of PARP. Our findings suggested that Tan IIA could contribute to apoptosis of HSC by
promoting ERK-Bax-caspase
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