RRC ID 42474
Author Kugimiya F, Yano F, Ohba S, Igawa K, Nakamura K, Kawaguchi H, Chung UI.
Title Mechanism of osteogenic induction by FK506 via BMP/Smad pathways.
Journal Biochem Biophys Res Commun
Abstract FK506 is an immunosuppressant that exerts effects by binding to FK506-binding protein 12 (FKBP12). Recently, FK506 has also been reported to promote osteogenic differentiation when administered locally or in vitro in combination with bone morphogenetic proteins (BMPs), although the underlying mechanism remains unclarified. The present study initially showed that FK506 alone at a higher concentration (1muM) induced osteogenic differentiation of mesenchymal cell lines, which was suppressed by adenoviral introduction of Smad6. FK506 rapidly activates the BMP-dependent Smads in the absence of BMPs, and the activation was blocked by Smad6. Overexpression of FKBP12, which was reported to block the ligand-independent activation of BMP type I receptor A (BMPRIA), suppressed Smad signaling induced by FK506, but not that induced by BMP2. BMPRIA and FKBP12 bound to each other, and this binding was suppressed by FK506. These data suggest that FK506 promotes osteogenic differentiation by activating BMP receptors through interacting with FKBP12.
Volume 338(2)
Pages 872-9
Published 2005-12-16
DOI 10.1016/j.bbrc.2005.10.024
PII S0006-291X(05)02254-0
PMID 16246307
MeSH Animals Bone Morphogenetic Proteins / metabolism* Cell Differentiation / drug effects Cell Differentiation / physiology Cell Line Dose-Response Relationship, Drug Gene Expression Regulation / drug effects Gene Expression Regulation / physiology Mesenchymal Stem Cells / cytology* Mesenchymal Stem Cells / drug effects Mesenchymal Stem Cells / physiology* Mice Osteogenesis / drug effects Osteogenesis / physiology* Signal Transduction / drug effects Signal Transduction / physiology* Smad Proteins / metabolism* Tacrolimus / administration & dosage*
IF 2.705
Times Cited 36
Human and Animal Cells