[Recent topics on bone remodeling].
The Wnt signaling pathway has recently been demonstrated to play an important role in regulation of bone formation. LRP5 is thought to signal through the canonical Wnt pathway. In humans, LRP5 loss-of-function mutations lead to low bone mass with fractures, while LRP5 gain-of-function mutations lead to high bone mass, thus identifying LRP5 as an important regulator of bone mass. Patients with sclerosteosis have a severe skeletal disorder with progressive bone overgrowth due to a loss of function of the SOST gene, which implicates its role as a suppressor of bone formation. Recent study revealed that SOST is a BMP antagonist with unique ligand specificity, negatively regulating bone formation by repressing BMP-induced osteoblast differentiation or function or both.
Shinoda
Yusuke
Y
Department of Orthopaedic Surgery and Division of Tissue Engineering, University of Tokyo Hospital, Tokyo, Japan.
Ogata
Naoshi
N
Chung
Ung Il
UI
Kawaguchi
Hiroshi
H
D048868:Adaptor Proteins, Signal Transducing; D000818:Animals; D019485:Bone Morphogenetic Proteins / Q000502:physiology; D016723:Bone Remodeling / Q000502:physiology*; D005819:Genetic Markers / Q000502:physiology; D006801:Humans; D011518:Proto-Oncogene Proteins / Q000502:physiology; D051153:Wnt Proteins
D048868:Adaptor Proteins, Signal Transducing; D019485:Bone Morphogenetic Proteins; D005819:Genetic Markers; D011518:Proto-Oncogene Proteins; C422903:SOST protein, human; D051153:Wnt Proteins