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DOI: 10.1055/s-0030-1270783
© Georg Thieme Verlag KG Stuttgart · New York
Differential Inhibitory Effects of Salvianolic Acids on Activation of Rat Hepatic Stellate Cells by Platelet-Derived Growth Factor
Publication History
received October 22, 2010
revised Dec. 27, 2010
accepted January 21, 2011
Publication Date:
21 February 2011 (online)
Abstract
Platelet-derived growth factor (PDGF) induces cell proliferation together with oxidative stress. The present study investigated the effects of salvianolic acid A (Sal A) and B (Sal B) on the PDGF-induced signaling cascades in hepatic stellate cells (HSCs). HSC-T6, a rat hepatic stellate cell line, was stimulated with PDGF (10 ng/mL). The inhibitory effects of Sal A and B on oxidative stress-related signaling pathways were assessed in vitro. The protein levels were measured by Western blotting. FACS analysis was applied to detect the thioredoxin (Trx) level. Sal A and B showed different inhibitory abilities on the PDGF-related pathway. Sal A inhibited 70-kDa ribosomal S6 kinase (p70s6k) and associated proteins. Sal B attenuated PDGF-induced c-jun-N-terminal kinase (JNK), p38, and PKC-δ phosphorylations. Both Sal A and B diminished the activation of PKD, Trx, heme-oxygenase (HO)-1, and Nrf2. Taken together, our results showed that Sal A and B attenuated PDGF-induced ROS formation in HSCs, possibly through different signaling pathways.
Key words
hepatic stellate cells - salvianolic acid - platelet-derived growth factor - oxidative stress - hepatic fibrosis - Salvia miltiorrhiza - Lamiaceae
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Dr. Yi-Tsau Huang, MD, PhD
Institute of Traditional Medicine
National Yang-Ming University
155, Li-Nong Street, Section 2
Taipei 112
Taiwan
Phone: +88 62 28 26 71 79
Fax: +88 62 28 22 50 44
Email: huangyt@ym.edu.tw
Dr. Yun-Lian Lin
Division of Medicinal Chemistry
National Research Institute of Chinese Medicine
155-1, Li-Nong Street, Section 2
Taipei 112
Taiwan
Phone: +88 62 28 22 55 92
Fax: +88 62 28 23 04 88
Email: yllin@nricm.edu.tw