Persistent Ferroptosis Modulates Cardiac Remodeling and M2 Macrophage Polarization, Which Can be Mitigated by Astaxanthin During Myocardial Infarction Recovery.

IF 3.4 3区 医学 Q2 CARDIAC & CARDIOVASCULAR SYSTEMS
Cheng Shen, Yanian Wei, Wen Kang, Qianwen Wang, Guoqiang Li, Xin Chen, Long Wang
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Abstract

The role of ferroptosis, an iron-dependent lipid peroxidation regulated cell death pathway, remains obscure during myocardial infarction (MI) recovery. Our study aims to clarify ferroptosis' function in post-MI cardiac recovery, explore the consequences of iron overload and ferroptosis for myocardial remodeling, and assess the effects of Liproxstatin-1 (Lipro-1) treatment on macrophage functionality. Moreover, we examine the potential of Astaxanthin (ASTX), recognized for its antioxidative properties, to mitigate ferroptosis during MI recovery and its subsequent ramifications for myocardial remodeling. Our results demonstrate persistent ferroptosis during MI recovery, marked by decreased Glutathione Peroxidase 4 and increased Acyl-CoA Synthetase Long-Chain Family Member 4 (ACSL4) and Ferroportin 1 alongside elevated lipid peroxidation and iron levels up to D21. We identified a significant correlation between ferroptosis and macrophage activity, noted by the increase in macrophage populations co-expressing GPX4 and ACSL4 markers in the peri-infarct area by D21. Liproxstatin-1 treatment reduced macrophage (CD68 +) counts, promoted M2 polarization decreased inflammation, and improved cardiac function. Myocardial remodeling was improved in Lipro-1-treated rats, as shown by decreased fibrosis and reduced levels of α-SMA, Collagen I, and Collagen III proteins. ASTX treatment also exhibited an inhibiting effect on ferroptosis indicators, and encouraged M2 macrophage polarization, reduced inflammation, and enhanced both cardiac function and myocardial remodeling, mirroring the beneficial effects observed with Lipro-1. In summary, the interactions between ferroptosis, macrophage polarization, and myocardial remodeling are crucial for cardiac function improvement post-MI. Lipro-1 and ASTX emerge as promising therapeutic agents by modulating post-MI ferroptosis and related immune responses.

在心肌梗死恢复过程中,虾青素可缓解持续性铁中毒对心脏重塑和 M2 巨噬细胞极化的调节作用。
铁变态反应是一种铁依赖的脂质过氧化调控细胞死亡途径,在心肌梗死(MI)恢复过程中的作用仍不明显。我们的研究旨在阐明铁氧化在心肌梗死后心脏恢复过程中的功能,探讨铁超载和铁氧化对心肌重塑的影响,并评估脂稳素-1(Lipro-1)治疗对巨噬细胞功能的影响。此外,我们还研究了虾青素(ASTX)在心肌梗死恢复过程中缓解铁沉着及其对心肌重塑的影响的潜力。我们的研究结果表明,在心肌梗死恢复期间存在持续的铁中毒现象,其特征是谷胱甘肽过氧化物酶4减少、酰基-CoA合成酶长链家族成员4(ACSL4)和铁蛋白1增加,同时脂质过氧化和铁水平升高,直至D21。我们发现铁变态反应与巨噬细胞活性之间存在明显的相关性,这体现在D21时梗死周围区域共同表达GPX4和ACSL4标记的巨噬细胞数量增加。脂联素-1治疗可减少巨噬细胞(CD68 +)数量,促进M2极化,减轻炎症反应,并改善心脏功能。经脂联-1 处理的大鼠心肌重塑得到改善,表现为纤维化减少,α-SMA、胶原 I 和胶原 III 蛋白水平降低。ASTX 治疗还对铁凋亡指标有抑制作用,并能促进 M2 巨噬细胞极化、减少炎症、增强心脏功能和心肌重塑,这与 Lipro-1 的有益作用如出一辙。总之,铁蛋白沉积、巨噬细胞极化和心肌重塑之间的相互作用对改善心肌梗死后的心脏功能至关重要。Lipro-1 和 ASTX 通过调节心肌梗死后的铁蛋白沉积和相关的免疫反应,成为很有前景的治疗药物。
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来源期刊
Cardiovascular Toxicology
Cardiovascular Toxicology 医学-毒理学
CiteScore
6.60
自引率
3.10%
发文量
61
审稿时长
>12 weeks
期刊介绍: Cardiovascular Toxicology is the only journal dedicated to publishing contemporary issues, timely reviews, and experimental and clinical data on toxicological aspects of cardiovascular disease. CT publishes papers that will elucidate the effects, molecular mechanisms, and signaling pathways of environmental toxicants on the cardiovascular system. Also covered are the detrimental effects of new cardiovascular drugs, and cardiovascular effects of non-cardiovascular drugs, anti-cancer chemotherapy, and gene therapy. In addition, Cardiovascular Toxicology reports safety and toxicological data on new cardiovascular and non-cardiovascular drugs.
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