鉴定 ALOX15 引发的脂质过氧化作用可增加哮喘上皮细胞对铁死亡的易感性。

Identifying ALOX15-initiated lipid peroxidation increases susceptibility to ferroptosis in asthma epithelial cells.

机构信息

Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.

Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.

出版信息

Biochim Biophys Acta Mol Basis Dis. 2024 Jun;1870(5):167176. doi: 10.1016/j.bbadis.2024.167176. Epub 2024 Apr 18.

Abstract

Ferroptosis is a programmed form of cell death regulated by iron and has been linked to the development of asthma. However, the precise mechanisms driving ferroptosis in asthma remain elusive. To gain deeper insights, we conducted an analysis of nasal epithelial and sputum samples from the GEO database using three machine learning methods. Our investigation identified a pivotal gene, Arachidonate 15-lipoxygenase (ALOX15), associated with ferroptosis in asthma. Through both in vitro and in vivo experiments, we further confirmed the significant role of ALOX15 in ferroptosis in asthma. Our results demonstrate that ferroptosis manifests in an HDM/LPS-induced allergic airway inflammation (AAI) mouse model, mimicking human asthma, and in HDM/LPS-stimulated 16HBE cells. Moreover, we observed an up-regulation of ALOX15 expression in HDM/LPS-induced mice and cells. Notably, silencing ALOX15 markedly decreased HDM/LPS-induced ferroptosis in 16HBE cells. These findings indicate that ferroptosis may be implicated in the onset and progression of asthma, with ALOX15-induced lipid peroxidation raising the susceptibility to ferroptosis in asthmatic epithelial cells.

摘要

铁死亡是一种受铁调控的程序性细胞死亡方式,与哮喘的发生发展有关。然而,导致哮喘中铁死亡的确切机制仍不清楚。为了更深入地了解这一机制,我们使用三种机器学习方法对 GEO 数据库中的鼻上皮和痰液样本进行了分析。我们的研究发现了一个关键基因,花生四烯酸 15-脂氧合酶(ALOX15),与哮喘中的铁死亡有关。通过体外和体内实验,我们进一步证实了 ALOX15 在哮喘中铁死亡中的重要作用。我们的研究结果表明,铁死亡在 HDM/LPS 诱导的过敏性气道炎症(AAI)小鼠模型中表现出来,模拟了人类哮喘,并且在 HDM/LPS 刺激的 16HBE 细胞中也表现出来。此外,我们观察到在 HDM/LPS 诱导的小鼠和细胞中 ALOX15 的表达上调。值得注意的是,沉默 ALOX15 可显著降低 16HBE 细胞中由 HDM/LPS 诱导的铁死亡。这些发现表明,铁死亡可能参与了哮喘的发生和发展,ALOX15 诱导的脂质过氧化增加了哮喘上皮细胞对铁死亡的易感性。

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