title: Functional requirement of CCN2 for intramembranous bone formation in embryonic mice.
abstract: CCN2 is best known as a promoter of chondrocyte differentiation among the CCN family members, and Ccn2 null mutant mice display skeletal dysmorphisms. However, little is known concerning the roles of CCN2 during bone formation. We herein present a comparative analysis of wild-type and Ccn2 null mice to investigate the roles of CCN2 in bone development. Multiple histochemical methods were employed to analyze the effects of CCN2 deletion in vivo, and effects of CCN2 on the osteogenic response were evaluated with the isolated and cultured osteoblasts. As a result, we found a drastic reduction of the osteoblastic phenotype in Ccn2 null mutants. Importantly, addition of exogenous CCN2 promoted every step of osteoblast differentiation and rescued the attenuated activities of the Ccn2 null osteoblasts. These results suggest that CCN2 is required not only for the regulation of cartilage and subsequent events, but also for the normal intramembranous bone development.
authors: Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama 700-8525, Japan.
authors: Harumi
authors: H
authors: Kawaki
authors: Satoshi
authors: S
authors: Kubota
authors: Akiko
authors: A
authors: Suzuki
authors: Tomohiro
authors: T
authors: Yamada
authors: Tatsushi
authors: T
authors: Matsumura
authors: Toshiko
authors: T
authors: Mandai
authors: Mayumi
authors: M
authors: Yao
authors: Takeyasu
authors: T
authors: Maeda
authors: Karen M
authors: KM
authors: Lyons
authors: Masaharu
authors: M
authors: Takigawa
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D055513:Connective Tissue Growth Factor; D017874:Immediate-Early Proteins / Q000378:metabolism*; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism*; D051379:Mice / Q000196:embryology* / Q000378:metabolism*; D010006:Osteoblasts / Q000502:physiology*; D010012:Osteogenesis / Q000502:physiology*
chemical_list: C526318:CCN2 protein, mouse; D017874:Immediate-Early Proteins; D036341:Intercellular Signaling Peptides and Proteins; D055513:Connective Tissue Growth Factor