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Osteoblastic cells are involved in osteoclast formation.
N Takahashi1, T Akatsu, N Udagawa
1Department of Biochemistry, School of Dentistry, Showa University, Tokyo, Japan.
Endocrinology
|November 1, 1988
Summary
Osteoblastic cells are essential for osteoclast formation from spleen cell precursors. This co-culture system, using 1 alpha, 25-dihydroxyvitamin D3, demonstrated osteoblasts
Area of Science:
- Cell Biology
- Bone Biology
- Immunology
Background:
- Osteoclast differentiation is crucial for bone remodeling.
- The specific role of osteoblasts in supporting osteoclastogenesis requires further elucidation.
Purpose of the Study:
- To investigate the necessity of osteoblasts for osteoclast differentiation from spleen cell progenitors.
- To establish a co-culture system for studying osteoclast formation.
Main Methods:
- Co-culture of mouse spleen cells and osteoblastic cells with 1 alpha, 25-dihydroxyvitamin D3.
- Assessment of tartrate-resistant acid phosphatase (TRACP)-positive cell formation.
- Dentine resorption assays and calcitonin binding studies.
Main Results:
- Co-culture of spleen and osteoblastic cells with 1 alpha, 25-dihydroxyvitamin D3 generated numerous TRACP-positive cells.
- TRACP-positive cells exhibited specific binding to iodinated salmon calcitonin.
- Osteoblastic cells were indispensable for osteoclast differentiation, as evidenced by the absence of TRACP-positive cells in their omission or separation by a membrane filter.
Conclusions:
- Osteoblastic cells are required for the differentiation of osteoclast progenitors present in splenic tissues.
- This study highlights the critical role of osteoblasts in supporting osteoclastogenesis via cell-cell contact.