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Folliculin Regulates Osteoclastogenesis Through Metabolic Regulation
Author(s) -
Baba Masaya,
Endoh Mitsuhiro,
Ma Wenjuan,
Toyama Hirofumi,
Hirayama Akiyoshi,
Nishikawa Keizo,
Takubo Keiyo,
Hano Hiroyuki,
Hasumi Hisashi,
Umemoto Terumasa,
Hashimoto Michihiro,
Irie Nobuko,
Esumi Chiharu,
Kataoka Miho,
Nakagata Naomi,
Soga Tomoyoshi,
Yao Masahiro,
Kamba Tomomi,
Minami Takashi,
Ishii Masaru,
Suda Toshio
Publication year - 2018
Publication title -
journal of bone and mineral research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.882
H-Index - 241
eISSN - 1523-4681
pISSN - 0884-0431
DOI - 10.1002/jbmr.3477
Subject(s) - folliculin , osteoclast , autocrine signalling , microbiology and biotechnology , purinergic receptor , signal transduction , nfat , biology , rankl , transcription factor , chemistry , cancer research , activator (genetics) , receptor , biochemistry , gene , extracellular
Osteoclast differentiation is a dynamic differentiation process, which is accompanied by dramatic changes in metabolic status as well as in gene expression. Recent findings have revealed an essential connection between metabolic reprogramming and dynamic gene expression changes during osteoclast differentiation. However, the upstream regulatory mechanisms that drive these metabolic changes in osteoclastogenesis remain to be elucidated. Here, we demonstrate that induced deletion of a tumor suppressor gene, Folliculin ( Flcn ), in mouse osteoclast precursors causes severe osteoporosis in 3 weeks through excess osteoclastogenesis. Flcn ‐deficient osteoclast precursors reveal cell autonomous accelerated osteoclastogenesis with increased sensitivity to receptor activator of NF‐κB ligand (RANKL). We demonstrate that Flcn regulates oxidative phosphorylation and purine metabolism through suppression of nuclear localization of the transcription factor Tfe3, thereby inhibiting expression of its target gene Pgc1 . Metabolome studies revealed that Flcn ‐deficient osteoclast precursors exhibit significant augmentation of oxidative phosphorylation and nucleotide production, resulting in an enhanced purinergic signaling loop that is composed of controlled ATP release and autocrine/paracrine purinergic receptor stimulation. Inhibition of this purinergic signaling loop efficiently blocks accelerated osteoclastogenesis in Flcn ‐deficient osteoclast precursors. Here, we demonstrate an essential and novel role of the Flcn‐Tfe3‐Pgc1 axis in osteoclastogenesis through the metabolic reprogramming of oxidative phosphorylation and purine metabolism. © 2018 The Authors Journal of Bone and Mineral Research published by Wiley Periodicals, Inc. on behalf of American Society for Bone and Mineral Research (ASBMR).