title: [Preventive and therapeutic effects of Yiqi Huayu Recipe on degeneration of articular cartilage in rats with osteoarthritis].
abstract: OBJECTIVE
  To study the efficacy and possible mechanism of Yiqi Huayu Recipe (YQHYR), a compound traditional Chinese herbal medicine, in preventing and treating degeneration of the articular cartilage in rats with osteoarthritis (OA).
  
  
  METHODS
  A total of 90 one-month-old SD rats were randomly divided into normal control group, untreated group and YQHYR group, with 30 rats in each group. The osteoarthritis was induced by shoulder disarticulation plus upright posture in rats. The rats in YQHYR group were treated with YQHYR at 5-, 7- and 9-month old (4, 6 and 8 months after the surgery) for one month. Ten rats in each subgroup were sacrificed at 6-, 8- and 10-month old (5, 7 and 9 months after the surgery) respectively and the knee joint samples were harvested for detection. Safranin-O/fast green staining was performed to examine the morphology of articular cartilage. The expressions of type II collagen (Col2A1), aggrecan-1 (Agc1), matrix metalloproteinase-13 (MMP-13) and tissue inhibitor of metalloproteinase-1 (TIMP-1) mRNAs were evaluated by real-time fluorescent quantitation polymerase chain reaction.
  
  
  RESULTS
  Histological analysis showed that the structure of articular cartilage was seriously destroyed in rats in the untreated group. On the contrary, the degenerative changes of the articular cartilage in the YQHYR group were dropped off. Real-time fluorescent quantitation polymerase chain reaction showed that expressions of Agc1, TIMP-1 and Col2A1 mRNAs were up-regulated in 6- and 10-month-old rats in the YQHYR group as compared with those in the untreated group (P<0.01, P<0.05), but there was no significant difference in expression of MMP-13 mRNA between the YQHYR group and the untreated group. The expression of Agc1 mRNA was up-regulated and the expression of MMP-13 mRNA was down-regulated in the 8-month-old rats in YQHYR group as compared with those in the untreated group (P<0.01).
  
  
  CONCLUSIONS
  YQHYR can promote the synthesizing of aggrecan and type II collagen in chondrocytes and delay articular cartilage degradation in OA rats.
authors.affiliation: Institute of Spine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Hou
authors.forename: Qian-Qian
authors.initials: QQ
authors.lastname: Liang
authors.forename: Jian-Xin
authors.initials: JX
authors.lastname: He
authors.forename: Qin
authors.initials: Q
authors.lastname: Bian
authors.forename: Qi
authors.initials: Q
authors.lastname: Shi
authors.forename: Yong-Jun
authors.initials: YJ
authors.lastname: Wang
mesh_terms: D053674:Aggrecans / Q000378:metabolism; D000818:Animals; D002358:Cartilage, Articular / Q000187:drug effects* / Q000473:pathology; D024043:Collagen Type II / Q000378:metabolism; D004365:Drugs, Chinese Herbal / Q000494:pharmacology* / Q000627:therapeutic use; D008297:Male; D053509:Matrix Metalloproteinase 13 / Q000378:metabolism; D020370:Osteoarthritis, Knee / Q000473:pathology / Q000517:prevention & control*; D051381:Rats; D017207:Rats, Sprague-Dawley; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000378:metabolism
chemical_list: C508321:Acan protein, rat; D053674:Aggrecans; C511513:COL2A1 protein, rat; D024043:Collagen Type II; D004365:Drugs, Chinese Herbal; C576839:TIMP1 protein, rat; D019715:Tissue Inhibitor of Metalloproteinase-1; D053509:Matrix Metalloproteinase 13; C507083:Mmp13 protein, rat