title: Paget's disease of bone treated in five days with AHPrBP (APD) per Os.
abstract: Amino-hydroxypropylidene bisphosphonic acid (AHPrBP, previously APD) is a potent inhibitor of bone resorption. Since it remains in bone for a long time, and since it was not found to impair bone mineralization, it could be administered at high dose over a short period of time. Therefore, 11 patients with symptomatic Paget's disease received AHPrBP orally at 1200 mg/day over 5 consecutive days. Controls were performed after 1 month in all patients, 6 months in 8 patients, and one year in 4 patients. Clinical improvement and biochemical remission was observed in all patients, except one with severe disease. Side effects were negligible. Disease activity at bone scintigram decreased over 6 months. Plasma alkaline phosphatase activity fell progressively and significantly from 210 +/- 26 U/l (means +/- SEM) to 103 +/- 10 U/l after 6 months (nl less than 120 U/l). Urinary excretion of hydroxyproline decreased immediately and became normal (nl less than 2.3 mumol/lGF) as a mean at day 5 (from 4.6 +/- 0.4 mumol/lGF to 2.1 +/- 0.3 mumol/lGF). Thereafter it remained within the normal range (2.0 +/- 0.2 mumol/l at day 180). Plasma calcium and phosphate concentrations fell transiently between day 4 and 15, whereas plasma PTH levels increased over this period of time. In conclusion, a short course of AHPrBP given per os at high dose induces a rapid decline in activity and remission of moderate Paget's disease, without significant side effects.
authors.affiliation: Department of Internal Medicine, University Hospital, Lausanne, Switzerland.
authors.forename: D
authors.initials: D
authors.lastname: Thiébaud
authors.forename: P
authors.initials: P
authors.lastname: Jaeger
authors.forename: P
authors.initials: P
authors.lastname: Burckhardt
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000469:Alkaline Phosphatase / Q000097:blood; D004164:Diphosphonates / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D006909:Hydroxyproline / Q000652:urine; D008297:Male; D008875:Middle Aged; D010001:Osteitis Deformans / Q000188:drug therapy*; D000077268:Pamidronate
chemical_list: D004164:Diphosphonates; D000469:Alkaline Phosphatase; D000077268:Pamidronate; D006909:Hydroxyproline