title: Suppression of bone density loss and bone turnover in patients with hormone-sensitive prostate cancer and receiving zoledronic acid.
abstract: OBJECTIVE
  To report a randomized, placebo-controlled study of treatment with zoledronic acid every 3 months in patients with hormone-sensitive prostate cancer, both with and without bone metastases, to assess the effect on bone mineral density (BMD) and markers of bone turnover.
  
  
  METHODS
  Eligible patients included those with prostate cancer and on androgen-deprivation therapy for <12 months. Patients received zoledronic acid 4 mg intravenously, or placebo, every 3 months for four treatments. BMD, urinary N-telopeptides of type I collagen (NTX), and serum bone alkaline phosphatase (BAP) were measured every 3 months. In all, 42 patients were randomized.
  
  
  RESULTS
  After excluding BMD data from sites of known metastases, patients receiving zoledronic acid had a relative increase in BMD compared with those receiving placebo, of 4.2% and 7.1% at the femoral neck and lumbar spine, respectively. NTX and BAP decreased significantly in patients receiving zoledronic acid. NTX and BAP levels were significantly higher at baseline in patients with bone metastases than in those without.
  
  
  CONCLUSIONS
  Treatment with zoledronic acid every 3 months preserved bone density and suppressed markers of bone turnover in patients with androgen-deprived prostate cancer, both with and without bone metastases.
authors.affiliation: Division of Hematology and Medical Oncology, Oregon Health & Science University, 3303 SW Bond Avenue, Portland, OR 97239, USA. ryanc@ohsu.edu
authors.forename: Christopher W
authors.initials: CW
authors.lastname: Ryan
authors.forename: Dezheng
authors.initials: D
authors.lastname: Huo
authors.forename: Kathryn
authors.initials: K
authors.lastname: Bylow
authors.forename: Laurence M
authors.initials: LM
authors.lastname: Demers
authors.forename: Walter M
authors.initials: WM
authors.lastname: Stadler
authors.forename: Tara O
authors.initials: TO
authors.lastname: Henderson
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Vogelzang
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy*; D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density / Q000187:drug effects; D050071:Bone Density Conservation Agents / Q000627:therapeutic use*; D001859:Bone Neoplasms / Q000556:secondary; D016723:Bone Remodeling / Q000187:drug effects; D004164:Diphosphonates / Q000627:therapeutic use*; D004311:Double-Blind Method; D007987:Gonadotropin-Releasing Hormone / Q000819:agonists*; D006801:Humans; D007093:Imidazoles / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009919:Orchiectomy / Q000009:adverse effects; D010024:Osteoporosis / Q000139:chemically induced / Q000517:prevention & control*; D011471:Prostatic Neoplasms / Q000188:drug therapy*; D012189:Retrospective Studies; D016896:Treatment Outcome; D000077211:Zoledronic Acid
chemical_list: D050071:Bone Density Conservation Agents; D004164:Diphosphonates; D007093:Imidazoles; D007987:Gonadotropin-Releasing Hormone; D000077211:Zoledronic Acid