title: [Effect of Hovenia dulcis extract on expression of MMP-13 and TIMP-1 in hepatic tissue].
abstract: OBJECTIVE
  To investigate the effects of Hovenia dulcis extract on mRNA expression of MMP-13 and TIMP-1 mRNA in hepatic tissue in experimental rats.
  
  
  METHODS
  48 male Sprague-Dawley rats were randomly divided into 2 groups: normal group (16) and model group (32), hepatic fibrosis was induced by CCl4 for 6 weeks in rats, 8 rats were sacrificed at the end of the 6th week from every group respectively, HE staining of hepatic tissue was performed; In the model group, rats randomly subdivided into 3 groups: spontaneous recovery group, control group and medication administration group, 8 rats were sacrificed at the end of the 12th week from every group respectively, the mRNA levels of MMP-13 and TIMP-1 in hepatic tissue were assayed by semi-quantitative RT-PCR.
  
  
  RESULTS
  The mRNA expression of MMP-13 among the 4 groups were not statistically significant, but the mRNA expression of TIMP-1 among the 4 groups were statiscally significant. The levels of TIMP-1 mRNA were significantly increased in control group and medication administration group compared, with those in the model group (P < 0.05), and reverse effects of medication administration groups were significantly high than those of control group (P < 0.05).
  
  
  CONCLUSIONS
  Inhibition of the mRNA expression of TIMP-1 may be the mechanism of reversing hepatic fibrosis H. dulcis, for thus collogen degradation system was recoveried gradually.
authors.affiliation: Department of Pharmacy, Renmin Hospital, Wuhan University, China.
authors.forename: Xiu-ling
authors.initials: XL
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Zhnag
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
mesh_terms: D000818:Animals; D002252:Carbon Tetrachloride Poisoning; D004365:Drugs, Chinese Herbal / Q000302:isolation & purification / Q000494:pharmacology*; D005786:Gene Expression Regulation; D008099:Liver / Q000378:metabolism / Q000473:pathology; D008106:Liver Cirrhosis, Experimental / Q000209:etiology / Q000378:metabolism* / Q000473:pathology; D008297:Male; D053509:Matrix Metalloproteinase 13 / Q000096:biosynthesis* / Q000235:genetics; D010946:Plants, Medicinal / Q000737:chemistry; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D027823:Rhamnaceae / Q000737:chemistry; D012639:Seeds / Q000737:chemistry; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D004365:Drugs, Chinese Herbal; D012333:RNA, Messenger; D019715:Tissue Inhibitor of Metalloproteinase-1; D053509:Matrix Metalloproteinase 13