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J Biol Chem, Vol. 275, Issue 11, 8126-8132, March 17, 2000
Cloning and Function of Rabbit Peroxisome Proliferator-activated
Receptor / in Mature Osteoclasts*
Hiroshi
Mano §,
Chiharu
Kimura¶,
Yukio
Fujisawa¶,
Takashi
Kameda ,
Mikiko
Watanabe-Mano ,
Hironori
Kaneko ,
Toshio
Kaneda ,
Yoshiyuki
Hakeda , and
Masayoshi
Kumegawa
From the Department of Oral Anatomy, Meikai
University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama 350-02, Japan, the § Department of Bioscience, Faculty of Applied
Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka,
Setagaya, Tokyo 156, Japan, and the ¶ Molecular Pharmacology
Laboratory, Pharmaceutical Research Division, Pharmaceutical Group,
Takeda Chemical Industries, Ltd., 2-17-85 Juso-Honmachi,
Yodogawa, Osaka 532, Japan
Osteoclasts modulate bone resorption under
physiological and pathological conditions. Previously, we showed that
both estrogens and retinoids regulated osteoclastic bone resorption and
postulated that such regulation was directly mediated through their
cognate receptors expressed in mature osteoclasts. In this study, we
searched for expression of other members of the nuclear hormone
receptor superfamily in osteoclasts. Using the low stringency
homologous hybridization method, we isolated the peroxisome
proliferator-activated receptor / (PPAR / ) cDNA from
mature rabbit osteoclasts. Northern blot analysis showed that
PPAR / mRNA was highly expressed in highly enriched rabbit
osteoclasts. Carbaprostacyclin, a prostacyclin analogue known to be a
ligand for PPAR / , significantly induced both bone-resorbing
activities of isolated mature rabbit osteoclasts and mRNA
expression of the cathepsin K, carbonic anhydrase type II, and
tartrate-resistant acid phosphatase genes in these cells. Moreover, the
carbaprostacyclin-induced bone resorption was completely blocked by an
antisense phosphothiorate oligodeoxynucleotide of PPAR / but not
by the sense phosphothiorate oligodeoxynucleotide of the same DNA
sequence. Our results suggest that PPAR / may be involved in
direct modulation of osteoclastic bone resorption.
*
This work was supported in part by a grant from the Ministry
of Education, Science, Sports, and Culture of Japan.The costs of publication of this
article were defrayed in part by the
payment of page charges. The article
must therefore be hereby marked
"advertisement" in
accordance with 18 U.S.C. Section
1734 solely to indicate this fact.
The nucleotide sequence reported in this paper has been submitted
to the DDBJ/GenBankTM/EBI Data Bank with accession
number AB033614.
To whom correspondence should be addressed. Tel.:
81-492-79-2768; Fax: 81-492-71-3523; E-mail:
o-anat-1@dent.meikai.ac.jp.
Copyright © 2000 by The American Society for Biochemistry and Molecular Biology, Inc.

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Copyright © 2000 by the American Society for Biochemistry and Molecular Biology.
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