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FUNCTION OF RUNX2 AND OSTERIX IN OSTEOGENESIS AND TEETH  

Kim, Jung-Eun (Dept. of Molecular Medicine, Kyungpook National University School of Medicine)
Publication Information
Journal of the Korean Association of Oral and Maxillofacial Surgeons / v.33, no.4, 2007 , pp. 381-385 More about this Journal
Abstract
Bone is a dynamic organ that bone remodeling occurs throughout life and involves the process in which the bone matrix is broken down through resorption by osteoclasts and then built back again through bone formation by osteoblasts. Usually these two processes balance each other and a stable level of bone mass is maintained. We here discuss transcription factors involved in regulating the osteoblast differentiation pathway. Runx2 is a transcription factor which is essential in skeletal development by regulating osteoblast differentiation and chondrocyte maturation. Its companion subunit, Cbf${\beta}$ is needed for an early step in osteoblast differentiation pathway. Whereas Osterix(Osx) is a new identified osteoblast-specific transcription factor which is required for the differentiation of preosteoblasts into more mature and functional osteoblasts. We also discuss other transcription factors, Msx1 and 2, Dlx5 and 6, Twist, and Sp3 that affect skeletal patterning and development. Understanding the characteristics of mice in which these transcription factors are inactivated should help define their role in bone physiology and pathology of bone defects.
Keywords
Bone remodeling; Osteoblast; Runx2; Osterix;
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