The effects of 1,25-dihydroxycholecalciferol on embryonic bone in vitro: A biochemical and histological study
- 1 December 1978
- journal article
- research article
- Published by Springer Nature in Calcified Tissue International
- Vol. 25 (1), 111-118
- https://doi.org/10.1007/bf02010759
Abstract
Summary Explants from embryonic rat and mouse calvaria were cultivated in the presence of different concentrations of 1,25-dihydroxycholecalciferol (1,25-(OH)2D3). The bone resorbing effects of the vitamin D3 metabolite were evaluated by measuring the release of calcium, phosphate, lactate and citrate into the culture medium after 24 h of cultivation. The influence on bone morphology was studied using embryonic mouse radii, in which histological phenomena in the bony, cartilagenous and connective tissue compartments were observed. Both kinds of experiments show that 1,25-(OH)2D3 has effects on embryonic bone which are typical for high concentrations of parathyroid hormone (PTH). However, the maximal effects on calcium release and on histology are 2.5 times less than those of PTH. In addition, some of the histological features such as the effects on epiphyseal cartilage and on osteoclasts were not observed. 1,25-(OH)2D3 in concentrations up to 2×10−9 M does not affect basal or PTH-stimulated cAMP levels in embryonic rat calvaria. In a concentration of 1×10−8 M, however, a significant decrease in PTH-stimulated cAMP production was found. It is concluded from these in vitro experiments that (1) 1,25-(OH)2D3 stimulates bone resorption, and (2) in 1,25-(OH)2D3-induced bone resorption cAMP is apparently not involved as a second messenger.Keywords
This publication has 16 references indexed in Scilit:
- Effect of Hydroxy-Vitamin D3Derivatives on45Ca Release from Rat Fetal Bonesin Vitro12Endocrinology, 1977
- Failure of 1,25 Dihydroxycholecalciferol [1,25-(OH)1-D3] to Modify Cyclic AMP Levels in Parathyroid Hormone-Treated and Untreated Bone Cells (1)Endocrine Research Communications, 1976
- Bone Resorbing Activity of Vitamin D Metabolites and Congenersin Vitro:Influence of Hydroxy1 Substituents in the A RingEndocrinology, 1975
- Early effect of 25-hydroxycholecalciferol (25-OH-D3) and 1,25-dihydroxycholecalciferol (1,25-(OH)2-D3) on the ability of parathyroid hormone (PTH) to elevate cyclic AMP of intact bone cellsBiochemical and Biophysical Research Communications, 1975
- The Effects of Dibutyryl Cyclic AMP, Aminophylline and Propranolol on PTE-Induced Bone Resorptionin VitroEndocrinology, 1974
- 1,25-Dihydroxycholecalciferol: Metabolite of Vitamin D 3 Active on Bone in Anephric RatsScience, 1972
- 1,25-Dihydroxycholecalciferol: A Potent Stimulator of Bone Resorption in Tissue CultureScience, 1972
- 25-Hydroxycholecalciferol: Stimulation of Bone Resorption in Tissue CultureScience, 1969
- An enzymic method for the measurement of inorganic phosphateAnalytical Biochemistry, 1967
- Bone Cells: Biochemical and Biological Studies after Enzymatic IsolationScience, 1964