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CGI1746 targets σ1R to modulate ferroptosis through mitochondria-associated membranes
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CGI1746 targets σ1R to modulate ferroptosis through mitochondria-associated membranes
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Journal Article
CGI1746 targets σ1R to modulate ferroptosis through mitochondria-associated membranes
2024
Overview
Ferroptosis is iron-dependent oxidative cell death. Labile iron and polyunsaturated fatty acid (PUFA)-containing lipids are two critical factors for ferroptosis execution. Many processes regulating iron homeostasis and lipid synthesis are critically involved in ferroptosis. However, it remains unclear whether biological processes other than iron homeostasis and lipid synthesis are associated with ferroptosis. Using kinase inhibitor library screening, we discovered a small molecule named CGI1746 that potently blocks ferroptosis. Further studies demonstrate that CGI1746 acts through sigma-1 receptor (σ
1
R), a chaperone primarily located at mitochondria-associated membranes (MAMs), to inhibit ferroptosis. Suppression of σ
1
R protects mice from cisplatin-induced acute kidney injury hallmarked by ferroptosis. Mechanistically, CGI1746 treatment or genetic disruption of MAMs leads to defective Ca
2+
transfer, mitochondrial reactive oxygen species (ROS) production and PUFA-containing triacylglycerol accumulation. Therefore, we propose a critical role for MAMs in ferroptosis execution.
A small molecule, CGI1746, was identified to block ferroptosis acting through the sigma-1 receptor, a chaperone primarily at endoplasmic reticulum–mitochondria contacts to mediate calcium transfer.
Publisher
Nature Publishing Group US,Nature Publishing Group
Subject
