Osteoclasts adapt to physioxia perturbation through DNA demethylation

Keizo Nishikawa, Shigeto Seno, Toshitada Yoshihara, Ayako Narazaki, Yuki Sugiura, Reito Shimizu, Junichi Kikuta, Reiko Sakaguchi, Norio Suzuki, Norihiko Takeda, Hiroaki Semba, Masamichi Yamamoto, Daisuke Okuzaki, Daisuke Motooka, Yasuhiro Kobayashi, Makoto Suematsu, Haruhiko Koseki, Hideo Matsuda, Masayuki Yamamoto, Seiji TobitaYasuo Mori, Masaru Ishii

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Oxygen plays an important role in diverse biological processes. However, since quantitation of the partial pressure of cellular oxygen in vivo is challenging, the extent of oxygen perturbation in situ and its cellular response remains underexplored. Using two-photon phosphorescence lifetime imaging microscopy, we determine the physiological range of oxygen tension in osteoclasts of live mice. We find that oxygen tension ranges from 17.4 to 36.4 mmHg, under hypoxic and normoxic conditions, respectively. Physiological normoxia thus corresponds to 5% and hypoxia to 2% oxygen in osteoclasts. Hypoxia in this range severely limits osteoclastogenesis, independent of energy metabolism and hypoxia-inducible factor activity. We observe that hypoxia decreases ten-eleven translocation (TET) activity. Tet2/3 cooperatively induces Prdm1 expression via oxygen-dependent DNA demethylation, which in turn activates NFATc1 required for osteoclastogenesis. Taken together, our results reveal that TET enzymes, acting as functional oxygen sensors, regulate osteoclastogenesis within the physiological range of oxygen tension, thus opening new avenues for research on in vivo response to oxygen perturbation.

本文言語English
論文番号e53035
ジャーナルEMBO Reports
22
12
DOI
出版ステータスPublished - 2021 12月 6

ASJC Scopus subject areas

  • 生化学
  • 分子生物学
  • 遺伝学

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