ACSL4

ACSL4 is a long-chain acyl-CoA synthetase that esterifies CoA into polyunsaturated fatty acids, including arachidonic acid and adrenic acid[1]. Mechanistically, ACSL4-catalyzed arachidonoyl-CoA biosynthesis promotes ferroptosis by triggering phospholipid peroxidation[1][2]. In disease models, ACSL4 shapes membrane lipid composition, predicts ferroptosis sensitivity in basal-like breast cancer cells, and its inhibition by thiazolidinediones reduced ferroptotic tissue damage in mice[2]. In adipocyte-specific ACSL4 knockout mice, reduced arachidonic acid incorporation into phospholipids protected against diet-induced obesity, adipocyte death, inflammation, and insulin resistance[3]. Compared with related ACSL isoforms, ACSL4 shows a distinct ferroptosis-linked role because ACSL3 and ACSL4 have distinct functions in ferroptosis and cancers[4]. For experimental applications, rosiglitazone inhibition of ACSL4 improved neurological function and reduced infarct volume after mouse middle cerebral artery occlusion[5].