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Interleukin‐6 does not stimulate bone resorption in neonatal mouse calvariae

Interleukin‐6 does not stimulate bone resorption in neonatal mouse calvariae Recombinant human interleukin‐6 (IL‐6) was assessed for its ability to stimulate bone resorption in prelabeled mouse calvariae in vitro. IL‐6 had no effect on bone resorption at concentrations ranging from 300 to 10,000 U/ml (3–1000 pg/ml). Neither the presence of indomethacin nor prolonged incubation periods (96 h) affected this result. IL‐6 did not affect resorption stimulated by human recombinant IL‐1α (rIL‐1α) but inhibited resorption stimulated by parathyroid hormone (PTH) and 1,25‐dihydroxyvitamin D3 [1,25‐(OH)2D3]. rIL‐1α, PTH, and 1,25‐(OH)2D3 induced IL‐6 release by calvariae. We conclude from these studies that IL‐6 does not stimulate bone resorption in neonatal mouse calvariae. However, it may act as a locally produced inhibitor and therefore a paracrine regulator of bone resorption induced by osteotropic hormones. IL‐6 could also function as a long‐range stimulator of systemic reactions and acute‐phase responses to local inflammatory and neoplastic lesions in bone. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Bone and Mineral Research Oxford University Press

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References (29)

Publisher
Oxford University Press
Copyright
Copyright © 1991 ASBMR
ISSN
0884-0431
eISSN
1523-4681
DOI
10.1002/jbmr.5650060103
Publisher site
See Article on Publisher Site

Abstract

Recombinant human interleukin‐6 (IL‐6) was assessed for its ability to stimulate bone resorption in prelabeled mouse calvariae in vitro. IL‐6 had no effect on bone resorption at concentrations ranging from 300 to 10,000 U/ml (3–1000 pg/ml). Neither the presence of indomethacin nor prolonged incubation periods (96 h) affected this result. IL‐6 did not affect resorption stimulated by human recombinant IL‐1α (rIL‐1α) but inhibited resorption stimulated by parathyroid hormone (PTH) and 1,25‐dihydroxyvitamin D3 [1,25‐(OH)2D3]. rIL‐1α, PTH, and 1,25‐(OH)2D3 induced IL‐6 release by calvariae. We conclude from these studies that IL‐6 does not stimulate bone resorption in neonatal mouse calvariae. However, it may act as a locally produced inhibitor and therefore a paracrine regulator of bone resorption induced by osteotropic hormones. IL‐6 could also function as a long‐range stimulator of systemic reactions and acute‐phase responses to local inflammatory and neoplastic lesions in bone.

Journal

Journal of Bone and Mineral ResearchOxford University Press

Published: Jan 1, 1991

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