Inhibiting acid‐sensing ion channel exerts neuroprotective effects in experimental epilepsy via suppressing ferroptosis

作者：Xiaorui Shi, Ru Liu, Yingting Wang, Tingting Yu, Kai Zhang, Chao Zhang, Yuyu Gu, Limin Zhang, Jianping Wu, Qun Wang, Fei Zhu · 发表于：CNS Neuroscience & Therapeutics · 年份：2024 · DOI：10.1111/cns.14596 · 被引用次数：21 · 研究领域：Ion Transport and Channel Regulation、Drug Transport and Resistance Mechanisms、Sphingolipid Metabolism and Signaling

Abstract Background Epilepsy is a chronic neurological disease characterized by repeated and unprovoked epileptic seizures. Developing disease‐modifying therapies (DMTs) has become important in epilepsy studies. Notably, focusing on iron metabolism and ferroptosis might be a strategy of DMTs for epilepsy. Blocking the acid‐sensing ion channel 1a (ASIC1a) has been reported to protect the brain from ischemic injury by reducing the toxicity of [Ca 2+ ] i . However, whether inhibiting ASIC1a could exert neuroprotective effects and become a novel target for DMTs, such as rescuing the ferroptosis following epilepsy, remains unknown. Methods In our study, we explored the changes in ferroptosis‐related indices, including glutathione peroxidase (GPx) enzyme activity and levels of glutathione (GSH), iron accumulation, lipid degradation products‐malonaldehyde (MDA) and 4‐hydroxynonenal (4‐HNE) by collecting peripheral blood samples from adult patients with epilepsy. Meanwhile, we observed alterations in ASIC1a protein expression and mitochondrial microstructure in the epileptogenic foci of patients with drug‐resistant epilepsy. Next, we accessed the expression and function changes of ASIC1a and measured the ferroptosis‐related indices in the in vitro 0‐Mg 2+ model of epilepsy with primary cultured neurons. Subsequently, we examined whether blocking ASIC1a could play a neuroprotective role by inhibiting ferroptosis in epileptic neurons. Results Our study first reported significant change...