Androgens regulate bone resorption activity of isolated osteoclasts in vitro

Larry Pederson, Matthew Kremer, Jeffrey Judd, David Pascoe, Thomas C. Spelsberg, B. Lawrence Riggs, Merry Jo Oursler

Research output: Contribution to journalArticle

110 Citations (Scopus)

Abstract

For many years it has been recognized that sex steroids have profound effects on bone metabolism. The current perception is that estrogen decreases bone resorption and androgen increases bone deposition. To investigate the potential for androgens to directly modulate bone resorption, we have examined avian osteoclast and human and mouse osteoclast-like cells for androgen responsiveness. There was a dose-dependent decrease in resorption activity in response to α-dihydrotestosterone (α-DHT), β-DHT, testosterone, or the synthetic androgen RU1881. This decrease was blocked by cotreatment with the specific androgen antagonist hydroxyflutamide. Further examination of avian osteoclasts revealed that the cells exhibited specific and saturable nuclear binding of tritiated RU1881 and that α-DHT stimulated the activity of the androgen response element as measured by using a chloramphenicol acetyltransferase reporter plasmid. In addition, avian osteoclasts responded to androgen treatment with elevated production and secretion of transforming growth factor β, a well documented response to androgen exposure in other cell systems. Treatment with either α-DHT or β- DHT for 24 hours resulted in a significant dose-dependent decrease in secretion of cathepsin B and tartrate-resistant acid phosphatase. This response to β-DHT, a stereoisomer of α-DHT that is inactive in other androgen receptor-dependent systems, supports the hypothesis that the osteoclast androgen receptor has unusual ligand-binding properties. Taken together, these results confirm the presence of functional androgen receptors in these cells and support the conclusion that osteoclasts are able to respond directly to androgens in vitro and thus are potential androgen target cells in vivo.

Original languageEnglish (US)
Pages (from-to)505-510
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume96
Issue number2
DOIs
StatePublished - Jan 19 1999

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Osteoclasts
Bone Resorption
Androgens
Androgen Receptors
Testosterone Congeners
Bone and Bones
Androgen Antagonists
Cathepsin B
Stereoisomerism
Chloramphenicol O-Acetyltransferase
In Vitro Techniques
Dihydrotestosterone
Response Elements
Transforming Growth Factors
Testosterone
Estrogens
Plasmids
Steroids
Ligands

ASJC Scopus subject areas

  • General
  • Genetics

Cite this

Androgens regulate bone resorption activity of isolated osteoclasts in vitro. / Pederson, Larry; Kremer, Matthew; Judd, Jeffrey; Pascoe, David; Spelsberg, Thomas C.; Riggs, B. Lawrence; Oursler, Merry Jo.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 96, No. 2, 19.01.1999, p. 505-510.

Research output: Contribution to journalArticle

Pederson, Larry ; Kremer, Matthew ; Judd, Jeffrey ; Pascoe, David ; Spelsberg, Thomas C. ; Riggs, B. Lawrence ; Oursler, Merry Jo. / Androgens regulate bone resorption activity of isolated osteoclasts in vitro. In: Proceedings of the National Academy of Sciences of the United States of America. 1999 ; Vol. 96, No. 2. pp. 505-510.
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