Osteoclasts adapt to physioxia perturbation through DNA demethylation

Abstract: 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.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Osteoclasts adapt to physioxia perturbation through DNA demethylation ; volume:22 ; number:12 ; year:2021 ; extent:16 ; EMBO reports / European Molecular Biology Organization ; 22, Heft 12 (2021) (gesamt 16)

Contributors, Places and Time

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

Further information

• DOI: 10.15252/embr.202153035
• URN: urn:nbn:de:101:1-2021120814104729188267
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:26 AM CEST