Ubiquitin E3 Ligase LNX2 is Critical for Osteoclastogenesis In Vitro by Regulating M-CSF/RANKL Signaling and Notch2

Verfasser / Beitragende:
[Jian Zhou, Toshifumi Fujiwara, Shiqiao Ye, Xiaolin Li, Haibo Zhao]
Ort, Verlag, Jahr:
2015
Enthalten in:
Calcified Tissue International, 96/5(2015-05-01), 465-475
Format:
Artikel (online)
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024 7 0 |a 10.1007/s00223-015-9967-7  |2 doi 
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245 0 0 |a Ubiquitin E3 Ligase LNX2 is Critical for Osteoclastogenesis In Vitro by Regulating M-CSF/RANKL Signaling and Notch2  |h [Elektronische Daten]  |c [Jian Zhou, Toshifumi Fujiwara, Shiqiao Ye, Xiaolin Li, Haibo Zhao] 
520 3 |a The Notch signaling pathway plays a crucial role in skeletal development and homeostasis by regulating the proliferation and differentiation of osteoblasts and osteoclasts. However, the molecular mechanisms modulating the level and activity of Notch receptors in bone cells remain unknown. In this study, we uncovered that LNX2, an E3 ubiquitin ligase and Notch inhibitor Numb binding protein, was up-regulated during osteoclast differentiation. Knocking-down LNX2 expression in bone marrow macrophages by lentivirus-mediated short hairpin RNAs markedly inhibited osteoclast formation. Decreased LNX2 expression attenuated macrophage colony-stimulating factor (M-CSF)-induced ERK and AKT activation and RANKL-stimulated activation of NF-κB and JNK pathways; therefore, accelerated osteoclast apoptosis. Additionally, loss of LNX2 led to an increased accumulation of Numb, which promoted the degradation of Notch and caused a reduction of the expression of the Notch downstream target gene, Hes1. We conclude that LNX2 regulates M-CSF/RANKL and the Notch signaling pathways during osteoclastogenesis. 
540 |a Springer Science+Business Media New York, 2015 
690 7 |a LNX2  |2 nationallicence 
690 7 |a Osteoclast  |2 nationallicence 
690 7 |a Bone resorption  |2 nationallicence 
690 7 |a RANKL  |2 nationallicence 
690 7 |a M-CSF  |2 nationallicence 
690 7 |a Notch  |2 nationallicence 
690 7 |a Numb  |2 nationallicence 
700 1 |a Zhou  |D Jian  |u Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Xuhui District, 200233, Shanghai, People's Republic of China  |4 aut 
700 1 |a Fujiwara  |D Toshifumi  |u Division of Endocrinology and Metabolism, Department of Internal Medicine, Center for Osteoporosis and Bone Metabolic Diseases, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 587, 72205, Little Rock, AR, USA  |4 aut 
700 1 |a Ye  |D Shiqiao  |u Division of Endocrinology and Metabolism, Department of Internal Medicine, Center for Osteoporosis and Bone Metabolic Diseases, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 587, 72205, Little Rock, AR, USA  |4 aut 
700 1 |a Li  |D Xiaolin  |u Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Xuhui District, 200233, Shanghai, People's Republic of China  |4 aut 
700 1 |a Zhao  |D Haibo  |u Division of Endocrinology and Metabolism, Department of Internal Medicine, Center for Osteoporosis and Bone Metabolic Diseases, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 587, 72205, Little Rock, AR, USA  |4 aut 
773 0 |t Calcified Tissue International  |d Springer US; http://www.springer-ny.com  |g 96/5(2015-05-01), 465-475  |x 0171-967X  |q 96:5<465  |1 2015  |2 96  |o 223 
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900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
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950 |B NATIONALLICENCE  |P 700  |E 1-  |a Zhou  |D Jian  |u Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Xuhui District, 200233, Shanghai, People's Republic of China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Fujiwara  |D Toshifumi  |u Division of Endocrinology and Metabolism, Department of Internal Medicine, Center for Osteoporosis and Bone Metabolic Diseases, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 587, 72205, Little Rock, AR, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Ye  |D Shiqiao  |u Division of Endocrinology and Metabolism, Department of Internal Medicine, Center for Osteoporosis and Bone Metabolic Diseases, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 587, 72205, Little Rock, AR, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Li  |D Xiaolin  |u Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Xuhui District, 200233, Shanghai, People's Republic of China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Zhao  |D Haibo  |u Division of Endocrinology and Metabolism, Department of Internal Medicine, Center for Osteoporosis and Bone Metabolic Diseases, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 587, 72205, Little Rock, AR, USA  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Calcified Tissue International  |d Springer US; http://www.springer-ny.com  |g 96/5(2015-05-01), 465-475  |x 0171-967X  |q 96:5<465  |1 2015  |2 96  |o 223