Omega-3 fatty acid epoxides produced by PAF-AH2 in mast cells regulate pulmonary vascular remodeling

Hidenori Moriyama, Jin Endo, Masaharu Kataoka, Yuta Shimanaka, Nozomu Kono, Yuki Sugiura, Shinichi Goto, Hiroki Kitakata, Takahiro Hiraide, Naohiro Yoshida, Sarasa Isobe, Tsunehisa Yamamoto, Kohsuke Shirakawa, Atsushi Anzai, Yoshinori Katsumata, Makoto Suematsu, Kenjiro Kosaki, Keiichi Fukuda, Hiroyuki Arai, Motoaki Sano

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Pulmonary hypertension is a fatal rare disease that causes right heart failure by elevated pulmonary arterial resistance. There is an unmet medical need for the development of therapeutics focusing on the pulmonary vascular remodeling. Bioactive lipids produced by perivascular inflammatory cells might modulate the vascular remodeling. Here, we show that ω-3 fatty acid-derived epoxides (ω-3 epoxides) released from mast cells by PAF-AH2, an oxidized phospholipid-selective phospholipase A2, negatively regulate pulmonary hypertension. Genetic deletion of Pafah2 in mice accelerate vascular remodeling, resulting in exacerbation of hypoxic pulmonary hypertension. Treatment with ω-3 epoxides suppresses the lung fibroblast activation by inhibiting TGF-β signaling. In vivo ω-3 epoxides supplementation attenuates the progression of pulmonary hypertension in several animal models. Furthermore, whole-exome sequencing for patients with pulmonary arterial hypertension identifies two candidate pathogenic variants of Pafah2. Our findings support that the PAF-AH2-ω-3 epoxide production axis could be a promising therapeutic target for pulmonary hypertension.

Original languageEnglish
Article number3013
JournalNature communications
Issue number1
Publication statusPublished - 2022 Dec

ASJC Scopus subject areas

  • General Physics and Astronomy
  • General Chemistry
  • General Biochemistry,Genetics and Molecular Biology


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