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Research Article Free access | 10.1172/JCI110177

Observations on the Mechanism of Bone Resorption Induced by Multiple Myeloma Marrow Culture Fluids and Partially Purified Osteoclast-activating Factor

Robert G. Josse, Timothy M. Murray, Gregory R. Mundy, Donna Jez, and Johan N. M. Heersche

Division of Endocrinology and Metabolism, St. Michael's Hospital, Canada M5B 1A6

Department of Medicine and Medical Research Council Group in Periodontal Physiology, University of Toronto, Canada M5B 1A6

Department of Medicine, University of Connecticut School of Medicine, Farmington, Connecticut 06032

Find articles by Josse, R. in: PubMed | Google Scholar

Division of Endocrinology and Metabolism, St. Michael's Hospital, Canada M5B 1A6

Department of Medicine and Medical Research Council Group in Periodontal Physiology, University of Toronto, Canada M5B 1A6

Department of Medicine, University of Connecticut School of Medicine, Farmington, Connecticut 06032

Find articles by Murray, T. in: PubMed | Google Scholar

Division of Endocrinology and Metabolism, St. Michael's Hospital, Canada M5B 1A6

Department of Medicine and Medical Research Council Group in Periodontal Physiology, University of Toronto, Canada M5B 1A6

Department of Medicine, University of Connecticut School of Medicine, Farmington, Connecticut 06032

Find articles by Mundy, G. in: PubMed | Google Scholar

Division of Endocrinology and Metabolism, St. Michael's Hospital, Canada M5B 1A6

Department of Medicine and Medical Research Council Group in Periodontal Physiology, University of Toronto, Canada M5B 1A6

Department of Medicine, University of Connecticut School of Medicine, Farmington, Connecticut 06032

Find articles by Jez, D. in: PubMed | Google Scholar

Division of Endocrinology and Metabolism, St. Michael's Hospital, Canada M5B 1A6

Department of Medicine and Medical Research Council Group in Periodontal Physiology, University of Toronto, Canada M5B 1A6

Department of Medicine, University of Connecticut School of Medicine, Farmington, Connecticut 06032

Find articles by Heersche, J. in: PubMed | Google Scholar

Published May 1, 1981 - More info

Published in Volume 67, Issue 5 on May 1, 1981
J Clin Invest. 1981;67(5):1472–1481. https://doi.org/10.1172/JCI110177.
© 1981 The American Society for Clinical Investigation
Published May 1, 1981 - Version history
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Abstract

Supernatant fluids from the cultures of bone marrow cells from 10 of 12 patients with multiple myeloma (MM) caused bone resorption in organ cultures of fetal rat calvaria. In four patients, the marrow cells were cultured with and without indomethacin (1 μM). The supernatant fluids from indomethacintreated marrow cultures caused significantly less bone resorption than supernatant fluids of cell cultures without indomethacin. This inhibition of release of bone resorbing factor(s) by myeloma cultures is similar to the previously observed indomethacin-induced inhibition of osteoclast-activating factor (OAF) production by activated human leukocytes. None of the MM supernatants had any effect on cyclic (c)AMP accumulation in resorbing bone in vitro.

Four separate preparations of partially purified OAF obtained from phytohemagglutinin-stimulated peripheral human leukocytes were tested for their ability (a) to cause bone resorption in organ cultures of fetal rat and neonatal mouse calvaria and (b) to cause accumulation of cAMP in rat and mouse skeletal tissue in vitro. Those dilutions of OAF that caused bone resorption had no effect on accumulation of cAMP in rat or mouse calvaria incubated in vitro. In addition, no stimulation of adenylate cyclase activity in membranes prepared from fetal rat calvaria could be found. Bone cell populations isolated by sequential collagenase digestion of fetal rat calvaria also showed no cAMP response to these dilutions of OAF. Parathyroid hormone caused a clear response in all three systems. Furthermore, no cAMP response to OAF was observed in calvaria in the presence of cholera toxin (1 μg/ml) and isobutyl-methylxanthine (0.3 mM).

These observations demonstrate that (a) supernatant fluids from MM marrow cultures stimulate bone resorption but do not increase cAMP accumulation in vitro; (b) indomethacin interferes with the release of bone resorbing factors by MM bone marrow cultures suggesting that this process requires prostaglandins; and (c) Sephadex G100 or G75 purified OAF does not stimulate adenylate cyclase or increase cAMP accumulation at equivalent bone resorbing concentrations in rat and mouse skeletal tissue.

The resorptive action of MM culture fluids is similar to that of partially purified OAF from activated cultured leukocytes, but different from those of other bone resorbing factors, parathyroid hormone and prostaglandin E2, which stimulate cAMP production in skeletal tissue.

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