Ferroptosis driven by radical oxidation of n-6 polyunsaturated fatty acids mediates acetaminophen-induced acute liver failure

Naoya Yamada, Tadayoshi Karasawa, Hiroaki Kimura, Sachiko Watanabe, Takanori Komada, Ryo Kamata, Ariunaa Sampilvanjil, Junya Ito, Kiyotaka Nakagawa, Hiroshi Kuwata, Shuntaro Hara, Koichi Mizuta, Yasunaru Sakuma, Naohiro Sata, Masafumi Takahashi

研究成果: Article査読

40 被引用数 (Scopus)

抄録

Acetaminophen (APAP) overdose is a common cause of drug-induced acute liver failure. Although hepatocyte cell death is considered to be the critical event in APAP-induced hepatotoxicity, the underlying mechanism remains unclear. Ferroptosis is a newly discovered type of cell death that is caused by a loss of cellular redox homeostasis. As glutathione (GSH) depletion triggers APAP-induced hepatotoxicity, we investigated the role of ferroptosis in a murine model of APAP-induced acute liver failure. APAP-induced hepatotoxicity (evaluated in terms of ALT, AST, and the histopathological score), lipid peroxidation (4-HNE and MDA), and upregulation of the ferroptosis maker PTGS2 mRNA were markedly prevented by the ferroptosis-specific inhibitor ferrostatin-1 (Fer-1). Fer-1 treatment also completely prevented mortality induced by high-dose APAP. Similarly, APAP-induced hepatotoxicity and lipid peroxidation were prevented by the iron chelator deferoxamine. Using mass spectrometry, we found that lipid peroxides derived from n-6 fatty acids, mainly arachidonic acid, were elevated by APAP, and that auto-oxidation is the predominant mechanism of APAP-derived lipid oxidation. APAP-induced hepatotoxicity was also prevented by genetic inhibition of acyl-CoA synthetase long-chain family member 4 or α-tocopherol supplementation. We found that ferroptosis is responsible for APAP-induced hepatocyte cell death. Our findings provide new insights into the mechanism of APAP-induced hepatotoxicity and suggest that ferroptosis is a potential therapeutic target for APAP-induced acute liver failure.

本文言語English
論文番号144
ジャーナルCell Death and Disease
11
2
DOI
出版ステータスPublished - 2020 2 1

ASJC Scopus subject areas

  • 免疫学
  • 細胞および分子神経科学
  • 細胞生物学
  • 癌研究

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