Year: 2026
Type: preprint
Abstract: Ferroptosis is a regulated form of cell death driven by iron-dependent and unrestrained lipid peroxidation, which generates phospholipid hydroperoxides that cause membrane rupture. Oxidized phospholipid species, including oxidized arachidonic acid-containing phosphatidylethanolamines (PE), are abundant during ferroptosis. However, previous studies have examined only a limited number of lipid species, and it remains unclear which oxidized phospholipids consistently arise across distinct cell types and ferroptosis-inducing conditions. Here, we comprehensively profiled oxidized phospholipids generated during ferroptosis across multiple cell lines and animal models. We identified PE 18:0_20:4;O3 and phosphatidylinositol (PI) 18:0_20:4;O3 as oxidized phospholipid species that are consistently detectable across all tested ferroptosis-inducing conditions. Furthermore, oxidized phosphatidylinositol impairs the phosphoinositide-initiated membrane tethering and lipid transport (PITT) pathway, a key mechanism for lysosomal membrane repair. These results indicate that the oxidized phospholipids identified here may serve as markers of ferroptosis while also acting as bioactive mediators that compromise lysosomal membrane homeostasis and repair.
Authors: Shota Fukuyama, Ping-Yen Hsieh, Yuka Jinnouchi, Yuta Matsuoka, Eisho Kozakura, Tomohiro Segawa, Hiroaki Matoba, Hideto Naka, Kyoko Mine, Yuuna Shiraiwa, Miku Yoneda, Takumi Udo, Nao Kato, Hiroki Nakanishi, Eikan Mishima, Yuki Sugiura, Mirinthorn Jutanom, Masami Abe, Pakawit Lerksaipheng, Marcus Conrad, Go Hirai, Ken-ichi Yamada
Language: English
Subfield: Pulmonary and Respiratory Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W7213058604