Genomewide Comprehensive Analysis Reveals Critical Cooperation Between Smad and c‐Fos in RANKL‐Induced Osteoclastogenesis. (May 2015)

• Record Type: Journal Article
• Authors: Omata, Yasunori; Yasui, Tetsuro; Hirose, Jun; Izawa, Naohiro; Imai, Yuuki; Matsumoto, Takumi; Masuda, Hironari; Tokuyama, Naoto; Nakamura, Shinya; Tsutsumi, Shuichi; Yasuda, Hisataka; Okamoto, Kazuo; Takayanagi, Hiroshi; Hikita, Atsuhiko; Imamura, Takeshi; Matsuo, Koichi; Saito, Taku; Kadono, Yuho; Aburatani, Hiroyuki; Tanaka, Sakae
• Is Part Of: Journal of bone and mineral research. Volume 30:Number 5(2015:May)
• Page Start: 869
• Page End: 877
• Publication Date: 2015-05
• Subjects: Bones -- Metabolism -- Periodicals; Mineral metabolism -- Periodicals; 612.392
• DOI: 10.1002/jbmr.2418
• Languages: English
• ISSNs: 0884-0431

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>ABSTRACT</title> <sec id="jbmr2418-sec-0001" sec-type="section"> <p>We have previously reported that transforming growth factor β (TGF‐β) plays an essential role in receptor activator of nuclear factor‐κB ligand (RANKL)‐induced osteoclastogenesis. However, the detailed underlying molecular mechanisms still remain unclear. Formaldehyde‐assisted isolation of regulatory elements (FAIRE) and chromatin immunoprecipitation (ChIP) followed by sequencing (FAIRE‐seq and ChIP‐seq) analyses indicated the cooperation of Smad2/3 with c‐Fos during osteoclastogenesis. Biochemical analysis and immunocytochemical analysis revealed that physical interaction between Smad2/3 and c‐Fos is required for their nuclear translocation. The gene expression of nuclear factor of activated T‐cells, cytoplasmic 1 (<italic>Nfatc1</italic>), a key regulator of osteoclastogenesis, was regulated by RANKL and TGF‐β, and c‐Fos binding to open chromatin sites was suppressed by inhibition of TGF‐β signaling by SB431542. Conversely, Smad2/3 binding to <italic>Nfatc1</italic> was impaired by c‐Fos deficiency. These results suggest that TGF‐β regulates RANKL‐induced osteoclastogenesis through reciprocal cooperation between Smad2/3 and c‐Fos. © 2014 American Society for Bone and Mineral Research.</p> </sec> </abstract>