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Macrophage hypoxia signaling regulates cardiac fibrosis via Oncostatin M

Research output: Contribution to journalArticle

Hajime Abe, Norihiko Takeda, Takayuki Isagawa, Hiroaki Semba, Satoshi Nishimura, Masaki Suimye Morioka, Yu Nakagama, Tatsuyuki Sato, Katsura Soma, Katsuhiro Koyama, Masaki Wake, Manami Katoh, Masataka Asagiri, Michael L. Neugent, Jung whan Kim, Christian Stockmann, Tomo Yonezawa, Ryo Inuzuka, Yasushi Hirota, Koji Maemura & 5 more Takeshi Yamashita, Kinya Otsu, Ichiro Manabe, Ryozo Nagai, Issei Komuro

Original languageEnglish
Article number2824
JournalNature Communications
Issue number1
Early online date27 Jun 2019
Publication statusE-pub ahead of print - 27 Jun 2019


King's Authors


The fibrogenic response in tissue-resident fibroblasts is determined by the balance between activation and repression signals from the tissue microenvironment. While the molecular pathways by which transforming growth factor-1 (TGF-β1) activates pro-fibrogenic mechanisms have been extensively studied and are recognized critical during fibrosis development, the factors regulating TGF-β1 signaling are poorly understood. Here we show that macrophage hypoxia signaling suppresses excessive fibrosis in a heart via oncostatin-m (OSM) secretion. During cardiac remodeling, Ly6Chi monocytes/macrophages accumulate in hypoxic areas through a hypoxia-inducible factor (HIF)-1α dependent manner and suppresses cardiac fibroblast activation. As an underlying molecular mechanism, we identify OSM, part of the interleukin 6 cytokine family, as a HIF-1α target gene, which directly inhibits the TGF-β1 mediated activation of cardiac fibroblasts through extracellular signal-regulated kinase 1/2-dependent phosphorylation of the SMAD linker region. These results demonstrate that macrophage hypoxia signaling regulates fibroblast activation through OSM secretion in vivo.

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