title: [Study on change of metabolism of articular cartilage in ovariectomized rats in the intervention of different drugs].
abstract: OBJECTIVE
  To study the influence of metabolism of articular cartilage in ovariectomized rats in the intervention of different drugs.
  
  
  METHODS
  Sixty-six virgin female Sprague-Dawley rats were randomly stratified into six groups: sham operation (SHAM) group,ovariectomized (OVX) group, estrogen replacement therapy (ERT) group, estrogen receptor modulator (ERM) group, Xianling Gubao([Chinese characters: see text], XLGB) group,and glucosamine sulfate (GS) group. One group subjected to standard sham operation and the remaining five groups were ovariectomized. The five ovariectomized groups received treatment either with the vehicle or different drugs given as an oral suspension in the vehicle. Urine samples were obtained at initial time and weeks 3, 5 and 7 after ovariectomy. ELISA method was used to measure the concentration of collagen II degradation products (CTX-II) in the urine. At study termination,histological analysis of the knee joint was used to assess the pathological changes of the articular cartilage.
  
  
  RESULTS
  Compared with the baseline, the concentration of CTX-II at weeks 3 and 5 after ovariectomy were obviously different (P < 0.05). Compared with the OVX group, concentration of CTX-II in the ERT group and ERM group were significant different (P < 0.01). XLGB group also was obviously different with the OVX group at the two points (P < 0.05). And interestingly in the histological examination in the OVX group was different with all the other groups.
  
  
  CONCLUSIONS
  The study indicates that estrogen deficiency accelerates destructive turnover of the collagen II in articular cartilage. The ERT, ERM, XLGB can relieve the effect. And all the drugs can delay the cartilage degradation caused by that effect.
authors.affiliation: Department of Traumatology, the Ruijin Hospital Affiliated to Medical College of Shanghai Jiaotong University, Shanghai 200025, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.forename: Ning
authors.initials: N
authors.lastname: Du
mesh_terms: D000818:Animals; D002358:Cartilage, Articular / Q000187:drug effects* / Q000378:metabolism* / Q000473:pathology; D024043:Collagen Type II / Q000378:metabolism*; D004365:Drugs, Chinese Herbal / Q000494:pharmacology; D020847:Estrogen Receptor Modulators / Q000494:pharmacology; D015914:Estrogen Replacement Therapy; D004967:Estrogens / Q000494:pharmacology; D005260:Female; D006801:Humans; D010003:Osteoarthritis / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D010052:Ovariectomy / Q000009:adverse effects; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D024043:Collagen Type II; D004365:Drugs, Chinese Herbal; D020847:Estrogen Receptor Modulators; D004967:Estrogens