Ziru Zhang1, Jianbo Ji2, Dawei Zhang3, Maoqiang Ma4, Longru Sun5. 1. Department of Natural Products Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, P.R. China. Electronic address: ziru9203@sina.com. 2. Institute of Pharmacology, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, P.R. China. Electronic address: jijianbo@sdu.edu.cn. 3. Department of Peripheral Vascular Disease, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250014, P. R. China. Electronic address: zhangdaweijn@126.com. 4. Pathology Department, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250014, P. R. China. Electronic address: ponyin@163.com. 5. Department of Natural Products Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, P.R. China. Electronic address: sunlr@sdu.edu.cn.
Abstract
BACKGROUND: The root of Salvia miltiorrhiza f. alba (RSMA) (Lamiaceae) is used for the treatment of patients with thromboangiitis obliterans (TAO) in traditional Chinese medicine. Previously, a mixture of phenolic acids extracted from RSMA has shown significant protective effects on TAO rats. PURPOSE: This study investigates the inhibitory effects of salvianolic acid B on TAO induced by sodium laurate injection in rats to explore the effective constituents of RSMA in TAO treatment. METHODS: TAO rats were developed using injected sodium laurate. After treatment with ligustrazine hydrochloride (15 mg/kg) and various doses of salvianolic acid B (10, 20, 40 mg/kg) by tail intravenous injection, levels of thromboxane B2 (TXB2), 6-keto-prostaglandin F1α (6-keto-PGF1α) and endothelin-1 (ET-1) in plasma were determined using enzyme-linked immunosorbent assay. The right femoral arteries were studied by hematoxylin and eosin staining and immunohistochemical analysis to determine pathological changes and overexpression of tumor necrosis factor (TNF)-α and inducible nitric oxide synthase (iNOS) in the femoral artery walls of TAO rats. RESULTS: Salvianolic acid B significantly decreased the expressions of TXB2 and ET-1 and increased the expression of 6-keto-PGF1α in plasma, and significantly inhibited the overexpression of TNF-α and iNOS in the femoral artery walls of TAO rats at medium and high doses. CONCLUSION: Salvianolic acid B has a protective effect on TAO rats. The mechanism may involve inhibition of thrombosis and TAO-associated inflammatory responses, which may explain the success of RSMA treatment of TAO in humans in traditional Chinese medical practice. Hence, it may be a potential drug for TAO treatment in conventional medicine.
BACKGROUND: The root of Salvia miltiorrhizaf. alba (RSMA) (Lamiaceae) is used for the treatment of patients with thromboangiitis obliterans (TAO) in traditional Chinese medicine. Previously, a mixture of phenolic acids extracted from RSMA has shown significant protective effects on TAOrats. PURPOSE: This study investigates the inhibitory effects of salvianolic acid B on TAO induced by sodium laurate injection in rats to explore the effective constituents of RSMA in TAO treatment. METHODS:TAOrats were developed using injected sodium laurate. After treatment with ligustrazine hydrochloride (15 mg/kg) and various doses of salvianolic acid B (10, 20, 40 mg/kg) by tail intravenous injection, levels of thromboxane B2 (TXB2), 6-keto-prostaglandin F1α (6-keto-PGF1α) and endothelin-1 (ET-1) in plasma were determined using enzyme-linked immunosorbent assay. The right femoral arteries were studied by hematoxylin and eosin staining and immunohistochemical analysis to determine pathological changes and overexpression of tumor necrosis factor (TNF)-α and inducible nitric oxide synthase (iNOS) in the femoral artery walls of TAOrats. RESULTS:Salvianolic acid B significantly decreased the expressions of TXB2 and ET-1 and increased the expression of 6-keto-PGF1α in plasma, and significantly inhibited the overexpression of TNF-α and iNOS in the femoral artery walls of TAOrats at medium and high doses. CONCLUSION:Salvianolic acid B has a protective effect on TAOrats. The mechanism may involve inhibition of thrombosis and TAO-associated inflammatory responses, which may explain the success of RSMA treatment of TAO in humans in traditional Chinese medical practice. Hence, it may be a potential drug for TAO treatment in conventional medicine.