title: The E3 ligase RNF185 negatively regulates osteogenic differentiation by targeting Dvl2 for degradation.
abstract: Osteoblast plays a pivotal role in bone metabolism and bone remodeling by mediating bone formation and regulating the activity of osteoclast. Clarifying the regulators and regulation mechanisms of osteogenic differentiation of mesenchymal stem cells (MSCs) and pre-osteoblasts will provide tremendous promise for bone repair and bone regeneration. RNF185 was identified as a candidate of endogenous suppressors of osteogenic specification in human mesenchymal stem cells (hMSCs). Here we show that RNF185 down regulates osteogenic differentiation of mouse calvaria-derived MC3T3-E1 cells, confirmed by quantitative real-time-PCR (qRT-PCR) and alkaline phosphatase (ALP) activity. Further we confirm that RNF185 interacts with dishevelled2 (Dvl2), a key mediator of Wnt signaling pathway. Overexpression of RNF185 decreases the exogenous and endogenous level of Dvl2, promotes the ubiquitination and degradation of Dvl2 and inhibits Wnt signaling, which is evident from the down-regulation of β-catenin mediated transcriptional activity. And Dvl2 reverses the effect of RNF185 on osteogenic differentiation of MC3T3-E1 cells. Taken together, our results indicate that RNF185 negatively regulates osteogenesis through the degradation of Dvl2 and down-regulation of canonical Wnt signaling pathway and suggest a possible therapeutic target in osteoporosis.
authors.affiliation: Institute of Orthopaedics, The First Affiliated Hospital of Chinese PLA General Hospital, No. 51 Fucheng Road, Beijing 100048, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
authors.forename: Hanqiao
authors.initials: H
authors.lastname: Shang
authors.affiliation: Institute of Orthopaedics, The First Affiliated Hospital of Chinese PLA General Hospital, No. 51 Fucheng Road, Beijing 100048, China.
authors.forename: Chunli
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Institute of Orthopaedics, The First Affiliated Hospital of Chinese PLA General Hospital, No. 51 Fucheng Road, Beijing 100048, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Institute of Orthopaedics, The First Affiliated Hospital of Chinese PLA General Hospital, No. 51 Fucheng Road, Beijing 100048, China.
authors.forename: Yantao
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Institute of Orthopaedics, The First Affiliated Hospital of Chinese PLA General Hospital, No. 51 Fucheng Road, Beijing 100048, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Shuang
authors.affiliation: Institute of Orthopaedics, The First Affiliated Hospital of Chinese PLA General Hospital, No. 51 Fucheng Road, Beijing 100048, China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Zhong
authors.affiliation: Institute of Orthopaedics, The First Affiliated Hospital of Chinese PLA General Hospital, No. 51 Fucheng Road, Beijing 100048, China. Electronic address: tangjiaguang2013@163.com.
authors.forename: Jiaguang
authors.initials: J
authors.lastname: Tang
authors.affiliation: Institute of Orthopaedics, The First Affiliated Hospital of Chinese PLA General Hospital, No. 51 Fucheng Road, Beijing 100048, China. Electronic address: instortho304@gmail.com.
authors.forename: Shuxun
authors.initials: S
authors.lastname: Hou
mesh_terms: D016475:3T3 Cells; D048868:Adaptor Proteins, Signal Transducing / Q000378:metabolism*; D000818:Animals; D002454:Cell Differentiation; D000072261:Dishevelled Proteins; D057809:HEK293 Cells; D006801:Humans; D051379:Mice; D024101:Mitochondrial Proteins / Q000235:genetics / Q000502:physiology*; D010012:Osteogenesis; D010750:Phosphoproteins / Q000378:metabolism*; D059748:Proteolysis; D014162:Transfection; D044767:Ubiquitin-Protein Ligases / Q000235:genetics / Q000502:physiology*; D054875:Ubiquitination
chemical_list: D048868:Adaptor Proteins, Signal Transducing; C000606581:DVL2 protein, human; D000072261:Dishevelled Proteins; C000606582:Dvl2 protein, mouse; D024101:Mitochondrial Proteins; D010750:Phosphoproteins; C569560:RNF185 protein, human; D044767:Ubiquitin-Protein Ligases
keywords: Dishevelled; E3 ligase; Osteogenic differentiation; Ubiquitination; Wnt signaling