Increased urinary type II collagen helical and C telopeptide levels are independently associated with a rapidly destructive hip osteoarthritis.
OBJECTIVE
Biochemical markers reflecting the degradation of the type II collagen helical (Helix-II) and type II collagen C telopeptides (CTX-II) have been developed.


OBJECTIVE
To investigate the association of rapidly destructive hip osteoarthritis with urinary Helix-II and urinary CTX-II.


METHODS
12 patients (mean age 70 years) meeting the criteria for rapidly destructive hip osteoarthritis and 28 patients with slowly progressive hip osteoarthritis (mean age 63 years) defined as <0.20 mm joint space loss/year were included in a case-control study. In each patient, urinary Helix-II and CTX-II were measured at the end of the follow-up period, with retrospective evaluation of x rays.


RESULTS
Helix-II levels were 41% (p = 0.002) higher in the 40 patients with hip osteoarthritis than in 75 healthy controls. Increased Helix-II levels were associated with decreased minimum joint space width of the hip (r = -0.57, p = 0.001). Mean urinary Helix-II levels were 71% higher in rapidly destructive than in slowly progressive disease (mean (standard deviation (SD)) ng/mmol Cr: 396 (160) v 232 (118) ng/mmol; p = 0.002). When levels of Helix-II and CTX-II in the highest tertile were both included in a multivariate logistic regression model, high Helix-II level (OR; (95% CI) 5.73 (1.01 to 32.8)) after adjustment for age and body mass index and high CTX-II level (6.67 (1.14 to 39.0)) were, independently of each other, associated with a rapidly destructive disease.


CONCLUSIONS
Increased urinary Helix-II levels are associated with rapidly destructive hip osteoarthritis, independently of urinary CTX-II. Measurement of Helix-II, alone or in combination with CTX-II, could be useful for the clinical investigation of patients with hip osteoarthritis.
Molecular Markers, Synarc, Lyon, France. patrick.garnero@synarc.com
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Conrozier
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D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000652:urine; D016022:Case-Control Studies; D024042:Collagen Type I / Q000652:urine*; D024043:Collagen Type II / Q000652:urine*; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D015207:Osteoarthritis, Hip / Q000000981:diagnostic imaging / Q000652:urine*; D010455:Peptides / Q000652:urine*; D011859:Radiography
D015415:Biomarkers; D024042:Collagen Type I; D024043:Collagen Type II; D010455:Peptides; C052929:collagen type I trimeric cross-linked peptide