scholarly journals Impaired Osteoclast Formation in Bone Marrow Cultures of Fgf2 Null Mice in Response to Parathyroid Hormone

2003 ◽  
Vol 278 (23) ◽  
pp. 21258-21266 ◽  
Author(s):  
Yosuke Okada ◽  
Aldemar Montero ◽  
Xuxia Zhang ◽  
Takanori Sobue ◽  
Joseph Lorenzo ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Parathyroid Hormone ◽  
Osteoclast Formation ◽  
Bone Marrow Cultures ◽  
Marrow Cultures

scholarly journals The role of gp130-mediated signals in osteoclast development: regulation of interleukin 11 production by osteoblasts and distribution of its receptor in bone marrow cultures.

1996 ◽  
Vol 183 (6) ◽  
pp. 2581-2591 ◽  
Author(s):  
E Romas ◽  
N Udagawa ◽  
H Zhou ◽  
T Tamura ◽  
M Saito ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Bone Marrow Cells ◽  
Osteoclast Formation ◽  
Pcr Analysis ◽  
Dihydroxyvitamin D3 ◽  
Bone Marrow Cultures ◽  
Primary Osteoblasts ◽  
Marrow Cultures

Interleukin (IL)-11 is a multifunctional cytokine whose role in osteoclast development has not been fully elucidated. We examined IL-11 production by primary osteoblasts and the effects of rat monoclonal anti-mouse glycoprotein 130 (gp130) antibody on osteoclast formation, using a coculture of mouse osteoblasts and bone marrow cells. IL-1, TNF alpha, PGE2, parathyroid hormone (PTH) and 1 alpha,25-dihydroxyvitamin D3 (1 alpha,25(OH)2D3) similarly induced production of IL-11 by osteoblasts, but IL-6, IL-4, and TGF beta did not. Primary osteoblasts constitutively expressed mRNAs for both IL-11 receptor (IL-11R alpha) and gp130. Osteotropic factors did not modulate IL-11R alpha mRNA at 24 h, but steady-state gp130 mRNA expression in osteoblasts was upregulated by 1 alpha,25(OH)2D3, PTH, or IL-1. In cocultures, the formation of multinucleated osteoclast-like cells (OCLs) in response to IL-11, or IL-6 together with its soluble IL-6 receptor was dose-dependently inhibited by rat monoclonal anti-mouse gp130 antibody. Furthermore, adding anti-gp130 antibody abolished OCL formation induced by IL-1, and partially inhibited OCL formation induced by PGE2, PTH, or 1 alpha,25(OH)2D3. During osteoclast formation in marrow cultures, a sequential relationship existed between the expression of calcitonin receptor mRNA and IL-11R alpha mRNA. Osteoblasts as well as OCLs expressed transcripts for IL-11R alpha, as indicated by RT-PCR analysis and in situ hybridization. These results suggest a central role of gp130-coupled cytokines, especially IL-11, in osteoclast development. Since osteoblasts and mature osteoclasts expressed IL-11R alpha mRNA, both bone-forming and bone-resorbing cells are potential targets of IL-11.

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