Abstract:
:Osteoclasts play a crucial role in osteolytic bone diseases, such as osteoporosis, rheumatoid arthritis, periodontitis, Paget's disease of bone and bone metastatic tumors. Therefore, controlling osteoclast differentiation and function has been considered a promising therapeutic strategy. Here, we show that necrostatin (Nec)-7, an inhibitor of programmed necrosis, strongly suppressed receptor activator of nuclear factor (NF)-κB ligand (RANKL)-induced osteoclastogenesis and bone resorption, without compromising macrophage colony-stimulating factor (M-CSF)-supported survival and growth of osteoclast precursor cells. Accordingly, Nec-7 significantly decreased the levels of RANKL-induced osteoclastogenic marker genes, such as cathepsin K. Mechanistically, Nec-7 neither affected MAPK nor NF-κB activation; however, it strongly inhibited the RANKL receptor (RANK) to nuclear factor of activated T cells c1 (NFATc1) signaling. Lentiviral expression of RANK in bone marrow-derived macrophages significantly restored osteoclastogenesis and NFATc1 amplification in Nec-7-treated cells. In this study, we revealed that Nec-7-sensitive pathways are crucially involved in osteoclast formation and function. Investigation of the molecular mechanism(s) through which Nec-7 inhibits RANK-NFATc1 signaling axis may lead to the development of new therapeutic strategies for bone disease.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Fuji H,Ohmae S,Noma N,Takeiri M,Yasutomi H,Izumi K,Ito M,Toyomoto M,Iwaki S,Takemoto K,Seo S,Taura K,Hida S,Aoyama M,Ishihama Y,Hagiwara M,Takeda N,Hatano E,Iwaisako K,Uemoto S,Asagiri Mdoi
10.1016/j.bbrc.2018.05.153subject
Has Abstractpub_date
2018-09-05 00:00:00pages
544-549issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(18)31224-5journal_volume
503pub_type
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