title: Preventive effects of a fractioned polysaccharide from a traditional Chinese herbal medical formula (Yu Ping Feng San) on carbon tetrachloride-induced hepatic fibrosis.
abstract: OBJECTIVE
  The study was to investigate the prevention effects and possible mechanism of Yu Ping Feng San fractioned polysaccharide (YPF-P) on CCl(4)-induced liver fibrosis in rats.
  
  
  METHODS
  YPF-P was prepared from root of Astragalus membranaceus, rhizome of Atractylodes macrocephaia and root of Raidix saposhnikoviae, and compared with polysaccharide from root of Astragalus membranaceus (AP). Hepatic fibrosis was induced by subcutaneous injection with carbon tetrachloride twice weekly for 12 weeks in Sprague-Dawley rats. YPF-P, AP and colchicine were administered intragastrically daily to carbon tetrachloride-treated rats. Histopathological changes of the liver and hepatic stellate cells were evaluated by Masson staining and transmission electron microscopy, respectively. Markers of fibrosis were determined by radioimmunoassay, biochemistry assay and ELISA. The mRNA expressions of tissue inhibitor of metalloproteinase-1 (TIMP-1), matrix metalloproteinase-13 (MMP-13), procollagen I and collagen III were detected by RT-PCR.
  
  
  RESULTS
  YPF-P dose-dependently alleviated the degree of liver fibrosis and inhibited hepatic stellate cell transformation into myofibroblast-like cells, markedly reduced the elevated levels of hyaluronic acid, laminin, type IV collagen, type III procollagen, hydroxyproline and transforming growth factor beta-1, suppressed procollagen I, collagen III and TIMP-1 expression, and improved the TIMP-1/MMP-13 ratio. MMP-13 expression was only promoted moderately by YPF-P. Compared with AP, YPF-P showed more potency on most markers except laminin, type IV collagen and MMP-13 mRNA.
  
  
  CONCLUSIONS
  YPF-P prevented the progress of rat liver fibrosis induced by carbon tetrachloride and had a more potent preventative effect. The preventative effect may be associated with the ability of YPF-P to inhibit the synthesis of matrix collagen and balance the TIMP/MMP system.
authors.affiliation: Anhui Medical University, China.
authors.forename: Jia-Jia
authors.initials: JJ
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.forename: Xiong-Wen
authors.initials: XW
authors.lastname: Lv
authors.forename: Wen-Ming
authors.initials: WM
authors.lastname: Cheng
authors.forename: Ying-Ying
authors.initials: YY
authors.lastname: Chen
mesh_terms: D000818:Animals; D019661:Apiaceae; D027885:Astragalus propinquus; D031174:Atractylodes; D002252:Carbon Tetrachloride Poisoning / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D056486:Chemical and Drug Induced Liver Injury / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control*; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000494:pharmacology / Q000627:therapeutic use*; D024022:Fibrillar Collagens / Q000235:genetics / Q000378:metabolism; D055166:Hepatic Stellate Cells / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D006820:Hyaluronic Acid / Q000378:metabolism; D006909:Hydroxyproline / Q000378:metabolism; D007797:Laminin / Q000378:metabolism; D008106:Liver Cirrhosis, Experimental / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control*; D019684:Magnoliopsida; D008297:Male; D020782:Matrix Metalloproteinases / Q000235:genetics / Q000378:metabolism; D008517:Phytotherapy; D018517:Plant Roots; D011134:Polysaccharides / Q000494:pharmacology / Q000627:therapeutic use*; D020011:Protective Agents / Q000494:pharmacology / Q000627:therapeutic use; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D027343:Rhizome; D053773:Transforming Growth Factor beta1 / Q000378:metabolism
chemical_list: D004365:Drugs, Chinese Herbal; D024022:Fibrillar Collagens; D007797:Laminin; D011134:Polysaccharides; D020011:Protective Agents; D012333:RNA, Messenger; D053773:Transforming Growth Factor beta1; C506362:yu ping feng san; D006820:Hyaluronic Acid; D020782:Matrix Metalloproteinases; D006909:Hydroxyproline