title: Tissue inhibitor of metalloprotease-1 (TIMP-1) serum level may predict progression of hip osteoarthritis.
abstract: OBJECTIVE
  To determine the predictive value of serum levels of TIMP-1 and hyaluronic acid in a 1 year prospective study in hip osteoarthritis (OA).
  
  
  METHODS
  Twenty-nine patients with OA of the hip were enrolled in a 1-year prospective study (median follow-up, 13 months). Biochemical analysis was used to assess TIMP-1 and hyaluronic acid at entry and at the end of the study. Radiographic evaluation with an assisted computed program was performed to calculate progression of joint space narrowing. Statistical tests served to determine correlations between observed serum levels and radiograph joint space narrowing.
  
  
  RESULTS
  Among the 29 patients, 10 showed joint space narrowing greater than 0.6 mm per year. The initial concentration of TIMP-1 as well as delta value of variation in serum levels of TIMP-1 (difference between TIMP-1 concentration at entry and at the end) correlated with the progression of joint space narrowing. A cut-off value of 600 ng/ml of TIMP-1 allowed the patients who progressed slowly from those who progressed more rapidly. Hyaluronic acid serum level was not predictive of evolution.
  
  
  CONCLUSIONS
  TIMP-1 serum level may serve to predict the evolution of patients with hip OA.
authors.affiliation: Department of Rheumatology, Hôpital Henri-Mondor, Université de Paris XII, Creteil, France. xavier.chevalier@hmn.ap-hop-paris.fr
authors.forename: X
authors.initials: X
authors.lastname: Chevalier
authors.forename: T
authors.initials: T
authors.lastname: Conrozier
authors.forename: M
authors.initials: M
authors.lastname: Gehrmann
authors.forename: P
authors.initials: P
authors.lastname: Claudepierre
authors.forename: P
authors.initials: P
authors.lastname: Mathieu
authors.forename: S
authors.initials: S
authors.lastname: Unger
authors.forename: E
authors.initials: E
authors.lastname: Vignon
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006820:Hyaluronic Acid / Q000097:blood*; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000175:diagnosis*; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012307:Risk Factors; D012680:Sensitivity and Specificity; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000097:blood*
chemical_list: D019715:Tissue Inhibitor of Metalloproteinase-1; D006820:Hyaluronic Acid