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1,25-Dihydroxyvitamin D3and Human Bone-Derived Cells in Vitro: Effects on Alkaline Phosphatase, Type I Collagen and Proliferation*
Abstract
1,25-Dihydroxyvitamin D3 [1,25-(OH)2D3], but not 24,25-(OH)2D3 stimulates the alkaline phosphatase activity of cultured human bone cell populations. The stimulatory effect of the sterol was dose dependent (10(-10)-10(-7) M), evident by 24 h, and observed over a range of cell densities. Analysis of the radiolabeled collagens synthesised by human bone cell cultures indicated the synthesis of predominantly type I collagen. In the presence of 1,25-(OH)2D3, but not 24,25-(OH)2D3, there was a dose-dependent (10(-11)-10(-9) M) increase in radiolabeled proline incorporation into collagenase-digestible protein and in the amount of collagen synthesized, expressed as a percentage of the total protein synthesis. The effect of 1,25-(OH)2D3 was observed over a range of cell densities and appeared to be specific for the synthesis of type I collagen. The stimulatory effect of 1,25-(OH)2D3 on alkaline phosphatase activity and the increase in proline incorporation into collagenase-digestible protein were accompanied by a dose-dependent (5 X 10(-11) to 5 X 10(-8) M) inhibition of bone cell proliferation. These findings suggest that 1,25-(OH)2D3 is an important modulator of the growth and differentiation of human bone cells in vitro. They are also consistent with the possibility that 1,25-(OH)2D3 has direct effects on bone formation in vivo.
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Cited by
Comparison of Multi-Lineage Cells from Human Adipose Tissue and Bone Marrow
De Ugarte, D. A., Morizono, K., Elbarbary, A., Alfonso, Z., Zuk, P. A., Zhu, M., Dragoo, J. L., Ashjian, P., Thomas, B., Benhaim, P., et al. (2003) · Cells Tissues Organs · doi:10.1159/000071150 · Cited by 1,173
Metadata
- Authors
- BERESFORD, J. N., GALLAGHER, J. A., & RUSSELL, R. G. G.
- Venue
- Endocrinology
- Publisher
- The Endocrine Society
- Published
- 1986-10
- Volume
- 119
- Issue
- 4
- Pages
- 1776-1785
- ISSN
- 0013-7227 (ISSN-L)
- 1945-7170
- OpenAlex
- W2039706665
- Cited by
- 279
- References
- 0
- FWCI
- 8.93
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: 1,25-Dihydroxyvitamin D3and Human Bone-Derived Cells in Vitro: Effects on Alkaline Phosphatase, Type I Collagen and Proliferation*. https://app.cochat.ai/papers/10.1210/endo-119-4-1776
- The paper
- BERESFORD, J. N., GALLAGHER, J. A., & RUSSELL, R. G. G. (1986). 1,25-Dihydroxyvitamin D3and Human Bone-Derived Cells in Vitro: Effects on Alkaline Phosphatase, Type I Collagen and Proliferation*. Endocrinology. https://doi.org/10.1210/endo-119-4-1776
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