Calcified Tissue International

, Volume 49, Issue 3, pp 168–173

Short-term course of 1,25(OH)2D3 stimulates osteoblasts but not osteoclasts in osteoporosis and osteoarthritis

  • Piet Geusens
  • Dirk Vanderschueren
  • Anne Verstraeten
  • Jan Dequeker
  • Paul Devos
  • Roger Bouillon
Clinical Investigations

DOI: 10.1007/BF02556112

Cite this article as:
Geusens, P., Vanderschueren, D., Verstraeten, A. et al. Calcif Tissue Int (1991) 49: 168. doi:10.1007/BF02556112

Summary

We investigated the effect of short-term, 1,25-dihydroxyvitamin D3 therapy (4 μg/day for 4 days) on calcium metabolism in 27 postmenopausal women (11 cases with osteoporosis and 16 cases with osteoarthritis). Bone mass at the axial and appendicular skeleton was higher in osteoarthritis than in osteoporosis. Initial values of calcium metabolism were similar. Osteoporotic and osteoarthritic patients responded with a similar significant increase in serum osteocalcin (+61% and +54%, respectively), fasting urinary calcium excretion (+178% and +124%, respectively) and 24 hour calcium excretion (+148% and +142%, respectively). Parathyroid hormone (PTH) levels decreased significantly in both groups (−30% and −18%, respectively). Osteoclastic bone resorption, evaluated by urinary hydroxyproline excretion, was not stimulated in either group. We conclude that in osteoporosis and also in osteoarthritis (1) 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) stimulation of osteoblast function is similar in production of osteocalcin; (2) the vitamin D target tissues react adequately to 1,25(OH)2D3 stimulation; (3) short-term high dose of 1,25(OH)2D3 does not stimulate bone resorption; and (4) the differences in bone mass between osteoarthritis and osteoporosis are not related to an alteration of the responsiveness to stimulation by 1,25 (OH)2D3.

Copyright information

© Springer-Verlag New York Inc. 1991

Authors and Affiliations

  • Piet Geusens
    • 1
  • Dirk Vanderschueren
    • 1
  • Anne Verstraeten
    • 1
  • Jan Dequeker
    • 1
  • Paul Devos
    • 2
  • Roger Bouillon
    • 3
  1. 1.Arthritis and Metabolic Bone Disease Research Unit, Division of RheumatologyU.Z. PellenbergPellenberg, K.U. LeuvenBelgium
  2. 2.Department of Nuclear MedicineU.Z. PellenbergPellenberg, K.U. LeuvenBelgium
  3. 3.Laboratory for Experimental Medicine and EndocrinologyU.Z. PellenbergPellenberg, K.U. LeuvenBelgium