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ACSL1 Aggravates Thromboinflammation by LPC/LPA Metabolic Axis in Hyperlipidemia Associated Myocardial Ischemia-Reperfusion Injury
Advanced Science ( IF 14.3 ) Pub Date : 2025-01-23 , DOI: 10.1002/advs.202406359
Shuai Jiang 1 , Xueguang Lin 1 , Bo Chen 1 , Gang Chen 2 , Kristine J S Kwan 1 , Jing Liu 3 , Qi Sun 4 , Jie Wang 1 , Yijie Lu 1 , Jindong Tong 1 , Ying Deng 1 , Bo Yu 1, 5 , Jingdong Tang 1
Affiliation  

Acute myocardial infarction (AMI) is associated with well-established metabolic risk factors, especially hyperlipidemia and obesity. Myocardial ischemia-reperfusion injury (mIRI) significantly offsets the therapeutic efficacy of revascularization. Previous studies indicated that disrupted lipid homeostasis can lead to lipid peroxidation damage and inflammation, yet the underlying mechanisms remain unclear. Here, the study demonstrates that hyperlipidemia is a key driver of mIRI. Long-chain fatty acyl-CoA synthetase 1 (ACSL1) is upregulated in both hyperlipidemia and AMI patients. ACSL1 expression is induced by a high-fat microenvironment (oxLDL and palmitic acid) in a concentration-dependent manner. Interestingly, the protein level is positively correlated with total cholesterol level and thromboinflammatory biomarkers. Furthermore, ACSL1 reprogrammed lipid metabolism in monocytes, leading to the accumulation of lysophosphatidylcholine (LPC)/lysophosphatidic acid (LPA). The monocytic LPC/LPA axis accelerated lipid peroxidation and neutrophil extracellular traps (NETs)-induced thromboinflammation via the paracrine effect. The main LPA producer Autotaxinis is also induced under high-fat conditions and then exerts thromboinflammation response through converted LPC to LPA. Finally, ACSL1 knockdown or NETs release inhibitor (DNase I or GSK484) significantly alleviated mIRI in mice. These findings highlight ACSL1 and NETosis as potential key targets for preventing mIRI and underscore the lipid peroxidation in the mechanisms of ACSL1-mediated thromboinflammation.

中文翻译:


ACSL1 在高脂血症相关心肌缺血再灌注损伤中通过 LPC/LPA 代谢轴加重血栓炎症



急性心肌梗死 (AMI) 与公认的代谢危险因素有关,尤其是高脂血症和肥胖。心肌缺血再灌注损伤 (mIRI) 显着抵消了血运重建的治疗效果。先前的研究表明,脂质稳态被破坏会导致脂质过氧化损伤和炎症,但其潜在机制仍不清楚。在这里,研究表明高脂血症是 mIRI 的关键驱动因素。长链脂肪酰基辅酶 A 合成酶 1 (ACSL1) 在高脂血症和 AMI 患者中均上调。ACSL1 表达由高脂肪微环境 (oxLDL 和棕榈酸) 以浓度依赖性方式诱导。有趣的是,蛋白质水平与总胆固醇水平和血栓炎症生物标志物呈正相关。此外,ACSL1 重编程单核细胞中的脂质代谢,导致溶血磷脂酰胆碱 (LPC)/溶血磷脂酸 (LPA) 的积累。单核细胞 LPC/LPA 轴通过旁分泌效应加速脂质过氧化和中性粒细胞细胞外陷阱 (NETs) 诱导的血栓炎症。主要的 LPA 生产者 Autotaxinis 也在高脂肪条件下被诱导,然后通过将 LPC 转化为 LPA 来发挥血栓炎症反应。最后,ACSL1 敲低或 NETs 释放抑制剂 (DNase I 或 GSK484) 显着减轻小鼠的 mIRI。这些发现突出了 ACSL1 和 NETosis 是预防 mIRI 的潜在关键靶点,并强调了 ACSL1 介导的血栓炎症机制中的脂质过氧化。
更新日期:2025-01-23
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