title: Pretreatment levels of urinary deoxypyridinoline as a potential marker in patients with prostate cancer with or without bone metastasis.
abstract: OBJECTIVE
  To assess the predictive role of the bone markers alkaline phosphatase (ALP) and urinary deoxypyridinoline (DPD), as indicators of bone turnover, at baseline in patients with prostate cancer.
  
  
  METHODS
  Urinary DPD, serum ALP and prostate-specific antigen (PSA) were evaluated in 23 patients with benign prostatic hyperplasia (BPH), 115 with prostatic carcinoma, of whom 21 had bone metastasis, and in 16 age-matched control subjects.
  
  
  RESULTS
  Patients with newly diagnosed prostate cancer and bone metastasis had a higher urinary excretion of DPD, and a higher serum PSA and ALP than had patients with BPH and those with prostate cancer but no metastasis. Receiver operating curve analysis for PSA, ALP and DPD showed a significant discriminating ability for positive and negative bone scans (P = 0.0684). However, from logistic regression of the combinations, only serum ALP was a significant independent predictor of bone metastasis in patients with prostate cancer.
  
  
  CONCLUSIONS
  Serum ALP or urinary DPD are the best predictors of bone metastasis in patients with prostate cancer; further studies with more patients are required.
authors.affiliation: Department of Urology, loc. vs. Ketwich, Martini Hospital, NL-9700 RM Groningen, The Netherlands.
authors.forename: L F
authors.initials: LF
authors.lastname: Wymenga
authors.forename: K
authors.initials: K
authors.lastname: Groenier
authors.forename: J
authors.initials: J
authors.lastname: Schuurman
authors.forename: J H
authors.initials: JH
authors.lastname: Boomsma
authors.forename: R O
authors.initials: RO
authors.lastname: Elferink
authors.forename: H J
authors.initials: HJ
authors.lastname: Mensink
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000469:Alkaline Phosphatase / Q000097:blood; D000596:Amino Acids / Q000652:urine*; D014408:Biomarkers, Tumor / Q000097:blood / Q000652:urine*; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000556:secondary; D006801:Humans; D008297:Male; D008875:Middle Aged; D017430:Prostate-Specific Antigen / Q000097:blood; D011471:Prostatic Neoplasms / Q000652:urine*; D012680:Sensitivity and Specificity
chemical_list: D000596:Amino Acids; D014408:Biomarkers, Tumor; C036020:deoxypyridinoline; D000469:Alkaline Phosphatase; D017430:Prostate-Specific Antigen