Osteoclast-like cell formation in fetal and newborn long-term baboon marrow cultures is more sensitive to 1,25-dihydroxyvitamin D3 than adult long-term marrow cultures.

N. Takahashi, G. R. Mundy, T. J. Kuehl, G. David Roodman

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Abstract

It is unknown if osteoclasts derived from animals at different developmental stages differ. To study this question, we used a long-term baboon marrow culture system in which osteoclast-like multinucleated cells (MNC) are formed. Fetal, newborn, or adult baboon marrow cultures were tested to determine if they differ in their responsiveness to osteotropic hormones. In fetal and newborn marrow cultures 1,25-dihydroxyvitamin D3 (1,25D3) at 10(-10) M significantly increased MNC formation with a maximal effect seen at 10(-9) M. Higher concentrations of 1,25D3 progressively decreased MNC formation. In contrast, in adult baboon marrow cultures, 10(-9) M 1,25D3 was required to significantly increase MNC formation, with a maximal affect at 10(-8) M 1,25D3. Calcitonin (25-200 ng/ml) inhibited MNC formation in fetal, newborn, or adult baboon marrow cultures treated with 1,25D3 in an identical manner. The effects of 1,25D3 on granulocyte-macrophage progenitor cells (CFU-GM), the probable precursors of MNC, were identical in fetal and adult baboon marrow cultures, with a significant inhibition of CFU-GM colony formation at 10(-8) M 1,25D3. These results suggest that 1) osteoclast precursors are more sensitive to some osteotropic hormones during the fetal and newborn periods, and 2) differences in the 1,25D3 sensitivity of osteoclast-like MNC formation in fetal, newborn, and adult baboon marrow cultures are not due to effects on early proliferating precursors but may result from effects of 1,25D3 on fusion of later precursors for MNC.

Original languageEnglish
Pages (from-to)311-317
Number of pages7
JournalJournal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research
Volume2
Issue number4
StatePublished - Aug 1987
Externally publishedYes

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Papio
Calcitriol
Osteoclasts
Bone Marrow
Granulocyte-Macrophage Progenitor Cells
Hormones
Calcitonin

ASJC Scopus subject areas

  • Surgery

Cite this

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title = "Osteoclast-like cell formation in fetal and newborn long-term baboon marrow cultures is more sensitive to 1,25-dihydroxyvitamin D3 than adult long-term marrow cultures.",
abstract = "It is unknown if osteoclasts derived from animals at different developmental stages differ. To study this question, we used a long-term baboon marrow culture system in which osteoclast-like multinucleated cells (MNC) are formed. Fetal, newborn, or adult baboon marrow cultures were tested to determine if they differ in their responsiveness to osteotropic hormones. In fetal and newborn marrow cultures 1,25-dihydroxyvitamin D3 (1,25D3) at 10(-10) M significantly increased MNC formation with a maximal effect seen at 10(-9) M. Higher concentrations of 1,25D3 progressively decreased MNC formation. In contrast, in adult baboon marrow cultures, 10(-9) M 1,25D3 was required to significantly increase MNC formation, with a maximal affect at 10(-8) M 1,25D3. Calcitonin (25-200 ng/ml) inhibited MNC formation in fetal, newborn, or adult baboon marrow cultures treated with 1,25D3 in an identical manner. The effects of 1,25D3 on granulocyte-macrophage progenitor cells (CFU-GM), the probable precursors of MNC, were identical in fetal and adult baboon marrow cultures, with a significant inhibition of CFU-GM colony formation at 10(-8) M 1,25D3. These results suggest that 1) osteoclast precursors are more sensitive to some osteotropic hormones during the fetal and newborn periods, and 2) differences in the 1,25D3 sensitivity of osteoclast-like MNC formation in fetal, newborn, and adult baboon marrow cultures are not due to effects on early proliferating precursors but may result from effects of 1,25D3 on fusion of later precursors for MNC.",
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T1 - Osteoclast-like cell formation in fetal and newborn long-term baboon marrow cultures is more sensitive to 1,25-dihydroxyvitamin D3 than adult long-term marrow cultures.

AU - Takahashi, N.

AU - Mundy, G. R.

AU - Kuehl, T. J.

AU - Roodman, G. David

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N2 - It is unknown if osteoclasts derived from animals at different developmental stages differ. To study this question, we used a long-term baboon marrow culture system in which osteoclast-like multinucleated cells (MNC) are formed. Fetal, newborn, or adult baboon marrow cultures were tested to determine if they differ in their responsiveness to osteotropic hormones. In fetal and newborn marrow cultures 1,25-dihydroxyvitamin D3 (1,25D3) at 10(-10) M significantly increased MNC formation with a maximal effect seen at 10(-9) M. Higher concentrations of 1,25D3 progressively decreased MNC formation. In contrast, in adult baboon marrow cultures, 10(-9) M 1,25D3 was required to significantly increase MNC formation, with a maximal affect at 10(-8) M 1,25D3. Calcitonin (25-200 ng/ml) inhibited MNC formation in fetal, newborn, or adult baboon marrow cultures treated with 1,25D3 in an identical manner. The effects of 1,25D3 on granulocyte-macrophage progenitor cells (CFU-GM), the probable precursors of MNC, were identical in fetal and adult baboon marrow cultures, with a significant inhibition of CFU-GM colony formation at 10(-8) M 1,25D3. These results suggest that 1) osteoclast precursors are more sensitive to some osteotropic hormones during the fetal and newborn periods, and 2) differences in the 1,25D3 sensitivity of osteoclast-like MNC formation in fetal, newborn, and adult baboon marrow cultures are not due to effects on early proliferating precursors but may result from effects of 1,25D3 on fusion of later precursors for MNC.

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