Lactate Dehydrogenase A Is a Novel Positive Regulator of Vascular Smooth Muscle Cell Ferroptosis During Aortic Dissection

作者：Feng Xin, Xin Feng, Xin Yi, Xin Yi, Bo Huo, Xian Guo, Jingjie Chen, Xian Guo, Ze-Min Fang, Fu-Han Gong, Wei Xiang, Ding-Sheng Jiang, Ding-Sheng Jiang, Yue Chen, Yue Chen · 发表于：Antioxidants and Redox Signaling · 年份：2024 · DOI：10.1089/ars.2024.0585 · 被引用次数：6 · 研究领域：Extracellular vesicles in disease、Ferroptosis and cancer prognosis、MicroRNA in disease regulation

Aims: Vascular smooth muscle cell (VSMC) ferroptosis is a pivotal event in the process of aortic dissection (AD), and a number of agents have a protective role against AD by inhibiting VSMC ferroptosis. While glycolysis is an ancient pathway related to almost all biological processes, its precise involvement in VSMC ferroptosis and AD remains unclear. Results: In this study, bioinformatics analysis revealed that glycolysis-related molecules and pathways were involved in VSMC ferroptosis and AD. We focused on the key enzyme of glycolysis, lactate dehydrogenase A (LDHA), and found that LDHA overexpression promoted ferroptosis and lipid peroxidation in cystine deprivation- or imidazole ketone erastin-treated VSMCs and vice versa. Clinical specimens showed a negative correlation between elevated LDHA levels in dissected aortae and ferroptosis-related molecules glutathione peroxidase 4 (GPX4), solute carrier family 7 member 11 (SLC7A11), and ferroptosis suppressor protein 1 (FSP1). In VSMC ferroptosis, LDHA overexpression led to the suppression of GPX4, SLC7A11, and FSP1. Furthermore, the interaction between LDHA and nuclear factor (erythroid-derived 2)-like 2 (NRF2) was identified, and the overexpression or agonist of NRF2 reversed the contribution of LDHA on VSMC ferroptosis and lipid peroxidation. Innovation and Conclusion: These results highlight a significant association between LDHA and VSMC ferroptosis in AD development mediated through NRF2. These findings present LDHA as ...