Chondromodulin I Is a Bone Remodeling Factor

Author:

Nakamichi Yuko12,Shukunami Chisa3,Yamada Takashi14,Aihara Ken-ichi1,Kawano Hirotaka4,Sato Takashi15,Nishizaki Yuriko3,Yamamoto Yoko1,Shindo Masayo1,Yoshimura Kimihiro1,Nakamura Takashi1,Takahashi Naoyuki2,Kawaguchi Hiroshi4,Hiraki Yuji3,Kato Shigeaki15

Affiliation:

1. The Institute of Molecular and Cellular Biosciences

2. The Institute for Oral Science, Matsumoto Dental University, Hiro-oka, Shiojiri, Nagano

3. The Institute for Frontier Medical Sciences, Kyoto University, Sakyo-ku, Kyoto

4. The Department of Orthopedic Surgery, Faculty of Medicine, University of Tokyo, Bunkyo-ku, Tokyo

5. CREST, Japan Science and Technology, Kawaguchi, Saitama, Japan

Abstract

ABSTRACT Chondromodulin I (ChM-I) was supposed from its limited expression in cartilage and its functions in cultured chondrocytes as a major regulator in cartilage development. Here, we generated mice deficient in ChM-I by targeted disruption of the ChM-I gene. No overt abnormality was detected in endochondral bone formation during embryogenesis and cartilage development during growth stages of ChM-I −/− mice. However, a significant increase in bone mineral density with lowered bone resorption with respect to formation was unexpectedly found in adult ChM-I −/− mice. Thus, the present study established that ChM-I is a bone remodeling factor.

Publisher

American Society for Microbiology

Subject

Cell Biology,Molecular Biology

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