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Abstract Title:

Suppression by fucoidan of liver fibrogenesis via the TGF-β/Smad pathway in protecting against oxidative stress.

Abstract Source:

Biosci Biotechnol Biochem. 2011 ;75(5):833-40. Epub 2011 May 20. PMID: 21597183

Abstract Author(s):

Sang-Won Hong, Kyung Hee Jung, Hee-Seung Lee, Hong-Mei Zheng, Myung-Joo Choi, Chongmu Lee, Soon-Sun Hong

Article Affiliation:

Department of Biomedical Sciences and NCEED, School of Medicine, Inha University, Incheon, Republic of Korea.

Abstract:

Fucoidan, a sulfated polysaccharide extracted from various types of brown seaweed, possesses a wide range of pharmacological properties. We investigated the protective effect of fucoidan on dimethylnitrosamine-induced liver fibrogenesis in rats and its mechanism. Liver fibrosis was induced by injecting DMN (10 mg/kg, 3 times per week, I.P.) for 4 weeks, and fucoidan was simultaneously administered (100 mg/kg, 3 times per week, P.O.). The anti-oxidative and anti-inflammatory effects of fucoidan were observed by relative mediators. Fucoidan improved liver fibrosis by inhibiting the expression of transforming growth factor beta 1 (TGF-β(1))/Smad3 and the tissue inhibitor of metalloproteinase 1 (TIMP-1), and increasing the expression of metalloproteinase-9 (MMP-9). Fucoidan also significantly decreased the accumulation of the extracellular matrix (ECM) and collagen. These results suggest that fucoidan had an anti-fibrotic effect,which was exerted by inhibiting the TGF-β/Smad pathway, as well as anti-oxidative and anti-inflammatory effects.

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