title: [Effects of Xiongshao capsule on blood vessel collagenase gene expression in experimental rabbits with arterial restenosis].
abstract: OBJECTIVE
  To observe the effects of Xiongshao Capsule (XSC) on blood vessel collagenase gene expression in experimental rabbits with arterial restenosis, and to probe its mechanisms for preventing restenosis.
  
  
  METHODS
  Restenosis rabbit model was established by injuring endothelium of abdominal aorta by balloon dilation and feeding with high fatty diet for 6 weeks. Eighty rabbits were randomly allocated into 8 groups, Group A, normal rabbit for control; Group B, rabbit with simple injured arterial endothelium; Group C, model rabbits at different times after modeling (3 days for Group C1, 2 weeks for Group C2, and 6 weeks for Group C3); Group D, model rabbit treated with Probucol for 6 weeks; Group E and F, model rabbit treated with small and large dose of XSC respectively. The effect of XSC on collagenase gene expression during the course of restenosis was observed adopting RT-PCR method and computer image analyzer, and its mechanisms in preventing RS were probed by combined analyzing the change of collagen and patho-morphological examination.
  
  
  RESULTS
  Compensatory dilation of lumens appeared at the end of the 2nd week; while 6 weeks after modeling, the diameters of lumens obviously diminished with an apparently increased proliferation index. The cell proliferation inhibiting effect in Group D and F was significant. The total amount of collagen increased and reached the peak at the 2nd week but without conspicuous accumulation on intima, which increased gradually and reached its peak at the 6th week. In Group D-F, especially in Group F, the amount of collagen in vascular wall (intima, media and externa) was lesser than that in Groups C. MMP-1 mRNA showed weak expression in Group A and Group C1-C3; significant difference only existed in comparing Group F with C3 (P < 0.05).
  
  
  CONCLUSIONS
  XSC could markedly increase the MMP-1 mRNA expression in injured portion of vessels, suggesting that its action in preventing RS might be related with the up-regulating of MMP-1 mRNA expression, increasing collagen degradation and reducing collagen deposition in vascular wall.
authors.affiliation: China-Japan Friendship Hospital, Beijing. deerxiaoyan@163.com
authors.forename: Xiao-Yan
authors.initials: XY
authors.lastname: Lu
authors.forename: Hao
authors.initials: H
authors.lastname: Xu
authors.forename: Da-Zhuo
authors.initials: DZ
authors.lastname: Shi
mesh_terms: D000818:Animals; D001012:Aorta, Abdominal / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D001024:Aortic Valve Stenosis / Q000201:enzymology / Q000209:etiology / Q000517:prevention & control*; D002214:Capsules; D002404:Catheterization / Q000009:adverse effects; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D004730:Endothelium, Vascular / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D005260:Female; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects*; D008297:Male; D020781:Matrix Metalloproteinase 1 / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D011817:Rabbits; D011897:Random Allocation; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D002214:Capsules; D004365:Drugs, Chinese Herbal; D012333:RNA, Messenger; C528128:xiongshao; D020781:Matrix Metalloproteinase 1