收稿日期: 2024-08-16
网络出版日期: 2025-02-19
基金资助
国家自然科学基金青年项目(81900273);国家自然科学基金面上项目(82060139);宁夏回族自治区重点研发计划项目(2019BEG03006);宁夏自然科学基金优秀青年项目(2023AAC05035);宁夏医科大学揭榜挂帅项目(XJKF240301)
Role of Toll⁃like receptor 4 in regulation of homocysteine⁃induced ferroptosis in macrophages
Received date: 2024-08-16
Online published: 2025-02-19
目的 探讨Toll 样受体4在调控同型半胱氨酸(homocysteine,Hcy)诱导巨噬细胞铁死亡中的作用。 方法 培养小鼠巨噬细胞RAW264.7,设置对照组(Control)、同型半胱氨酸干预组(Hcy)和同型半胱氨酸+铁死亡抑制剂组(Hcy+Fer-1);巨噬细胞转染干扰片段后予同型半胱氨酸干预,设置对照组(Control)、同型半胱氨酸干预组(Hcy)、TLR4干扰阴性对照+同型半胱氨酸干预组(si-NC+Hcy)、TLR4干扰+同型半胱氨酸干预组(si-TLR4+Hcy);巨噬细胞转染过表达慢病毒后予同型半胱氨酸干预,对照组(Control)、同型半胱氨酸干预组(Hcy)、TLR4过表达阴性对照+同型半胱氨酸干预组(OE-NC+Hcy)、TLR4过表达+同型半胱氨酸干预组(OE-TLR4+Hcy);干预细胞48 h后,实时荧光定量PCR和Western blot检测Hcy干预的巨噬细胞中TLR4表达水平;Western blot检测巨噬细胞中铁死亡相关蛋白ACSL4、GPX4及FTH1表达水平;采用铁离子试剂盒检测巨噬细胞内Fe2+浓度;采用ROS试剂盒及激光共聚焦显微镜检测细胞内活性氧的含量。 结果 与Control组相比,Hcy组促铁死亡相关蛋白ACSL4的表达水平升高(P < 0.05),抗铁死亡相关蛋白GPX4与FTH1的表达水平降低(P < 0.05),Fe2+浓度升高(P < 0.05),ROS含量增多,同时Hcy组中TLR4蛋白及mRNA表达水平均升高(P < 0.05);巨噬细胞转染TLR4干扰片段后,与si-NC+Hcy组相比,si-TLR4+Hcy组中GPX4与FTH1表达水平增高(P < 0.05),ACSL4表达水平降低(P < 0.05),Fe2+浓度降低(P < 0.05),ROS含量减少;巨噬细胞转染TLR4过表达慢病毒后,与OE-NC+Hcy组相比,OE-TLR4+Hcy组中GPX4与FTH1表达水平降低(P < 0.05),ACSL4表达水平升高(P < 0.05)。 结论 Hcy诱导巨噬细胞铁死亡的发生,而Toll样受体4对Hcy诱导的巨噬细胞铁死亡有正向调控作用。
翟俊杰 , 温少莹 , 李心如 , 孙睿 , 祁宁 , 张启凡 , 杨力 , 黄晖 , 马凌桔 , 郝银菊 , 姜怡邓 , 李桂忠 , 马胜超 . Toll样受体4在同型半胱氨酸诱导巨噬细胞铁死亡中的作用[J]. 实用医学杂志, 2025 , 41(3) : 313 -321 . DOI: 10.3969/j.issn.1006-5725.2025.03.002
Objective To investigate the role of Toll-like receptor 4 (TLR4) in the regulation of homocysteine (Hcy)-induced ferroptosis in macrophages. Methods Mouse macrophage cells RAW264.7 were cultured and divided into control group, Hcy intervention group (Hcy group), and Hcy plus ferroptosis inhibitor group (Hcy+Fer-1 group). After transfection with interference fragments, macrophages were treated with Hcy, and then divided into control group, Hcy intervention group (Hcy group), TLR4 interference negative control plus Hcy intervention group (si-NC+Hcy group), and TLR4 interference plus Hcy intervention group (si-TLR4+Hcy group). Macrophages were transfected with overexpression lentivirus and treated with Hcy, then were divided into control group, Hcy intervention group (Hcy group), a TLR4 overexpression negative control plus Hcy intervention group (OE-NC+Hcy group), and a TLR4 overexpression plus Hcy intervention group (OE-TLR4+Hcy group). After 48 hours of intervention, real-time fluorescent quantitative PCR and western blot were used to detect the expression levels of TLR4 in macrophages treated with Hcy; western blot was used to detect the expression levels of ferroptosis-related proteins ACSL4, GPX4, and FTH1 in macrophages, and ferrous ion assay kit to detect the concentration of Fe2+ in macrophages; reactive oxygen species (ROS) assay kit and laser confocal microscopy were used to detect the content of intracellular reactive oxygen species. Results Compared with those in the control group, the expression level of the pro-ferroptosis protein ACSL4 was increased in the Hcy group (P < 0.05), while the expression levels of anti-ferroptosis proteins GPX4 and FTH1 were decreased (P < 0.05); the concentration of Fe2+ was increased (P < 0.05), and the content of ROS was increased. Meanwhile, the protein and mRNA expression levels of TLR4 were both increased in the Hcy group (P < 0.05). After macrophages were transfected with TLR4 interference fragments, compared with those in the si-NC+Hcy group, the expression levels of GPX4 and FTH1 were increased (P < 0.05); the expression level of ACSL4 was decreased (P < 0.05); the concentration of Fe2+ was decreased (P < 0.05), and the content of ROS was reduced in the si-TLR4+Hcy group. After macrophages were transfected with TLR4 overexpression lentivirus, compared with those in the OE-NC+Hcy group, the expression levels of GPX4 and FTH1 were decreased (P < 0.05), and the expression level of ACSL4 was increased (P < 0.05) in the OE-TLR4+Hcy group. Conclusion Hcy induces the occurrence of ferroptosis in macrophages, and Toll-like receptor 4 has a positive feedback regulatory effect on ferroptosis in macrophages.
Key words: TLR4; macrophages; homocysteine; ferroptosis
| 1 | JOSEPH P, YUSUF S. Coordinating Efforts to Reduce the Global Incidence of Cardiovascular Disease[J]. N Engl J Med, 2023, 389(14):1329-1331. doi:10.1056/nejme2309401 |
| 2 | 中国心血管健康与疾病报告编写组. 中国心血管健康与疾病报告2022概要[J].中国循环杂志, 2023,38(6):583-586. doi:10.3969/j.issn.1000-3614.2023.06.001 |
| 3 | 方霆锋,江敏,胡炎伟.动脉粥样硬化斑块组织驻留巨噬细胞的研究进展[J].中国心血管杂志, 2024, 29(3):283-288. |
| 4 | 程陈, 张静, 黄萃园, 等. 胞葬作用缺陷在动脉粥样硬化发病机制中的研究进展[J].中国循环杂志, 2024, 39(4): 410-416. |
| 5 | CHEN W, SCHILPEROORT M, CAO Y, et al. Macrophage-targeted nanomedicine for the diagnosis and treatment of atherosclerosis[J]. Nat Rev Cardiol, 2022, 19(4):228-249. doi:10.1038/s41569-021-00629-x |
| 6 | BALINT B, JEPCHUMBA V K, GUéANT J L, et al. Mechanisms of homocysteine-induced damage to the endothelial, medial and adventitial layers of the arterial wall[J]. Biochimie, 2020, 173:100-106. doi:10.1016/j.biochi.2020.02.012 |
| 7 | KUMAR A, PATHAK R, PALFREY H A, et al. High levels of dietary methionine improves sitagliptin-induced hepatotoxicity by attenuating oxidative stress in hypercholesterolemic rats[J]. Nutr Metab (Lond), 2020, 17:2. doi:10.1186/s12986-019-0422-z |
| 8 | PETER K, ZUZANA T, KMETOVA M S, et al. Homocysteine and mitochondria in cardiovascular and cerebrovascular systems[J]. Int J Mol Sci, 2020, 21(20):7698-7698. doi:10.3390/ijms21207698 |
| 9 | RONALD J A, CHEN J W, CHEN Y, et al. Enzyme-sensitive magnetic resonance imaging targeting myeloperoxidase identifies active inflammation in experimental rabbit atherosclerotic plaques[J]. Circulation, 2009, 120(7):592-599. doi:10.1161/circulationaha.108.813998 |
| 10 | ROSHAN M H, TAMBO A, PACE N P. The Role of TLR2, TLR4, and TLR9 in the Pathogenesis of Atherosclerosis[J]. Int J Inflam, 2016, 2016:1532832. doi:10.1155/2016/1532832 |
| 11 | JEBARI-BENSLAIMAN S, GALICIA-GARCíA U, LARREA-SEBAL A, et al. Pathophysiology of Atherosclerosis[J]. Int J Mol Sci, 2022, 23(6):3346. doi:10.3390/ijms23063346 |
| 12 | KUZNETSOVA T, PRANGE K H M, GLASS C K, et al. Transcriptional and epigenetic regulation of macrophages in atherosclerosis[J]. Nat Rev Cardiol, 2020, 17(4):216-228. doi:10.1038/s41569-019-0265-3 |
| 13 | DE MEYER G R Y, ZUREK M, PUYLAERT P, et al. Programmed death of macrophages in atherosclerosis: Mechanisms and therapeutic targets[J]. Nat Rev Cardiol, 2024, 21(5):312-325. doi:10.1038/s41569-023-00957-0 |
| 14 | CALDERóN-LARRA?AGA A, SAADEH M, HOOSHMAND B, et al. Association of Homocysteine, Methionine, and MTHFR 677C>T Polymorphism With Rate of Cardiovascular Multimorbidity Development in Older Adults in Sweden[J]. JAMA Netw Open, 2020, 3(5):e205316. doi:10.1001/jamanetworkopen.2020.5316 |
| 15 | HU G, YUAN Z, WANG J. Autophagy inhibition and ferroptosis activation during atherosclerosis: Hypoxia-inducible factor 1α inhibitor PX-478 alleviates atherosclerosis by inducing autophagy and suppressing ferroptosis in macrophages[J]. Biomed Pharmacother, 2023, 161:114333. doi:10.1016/j.biopha.2023.114333 |
| 16 | LI N, JIANG W, WANG W, et al. Ferroptosis and its emerging roles in cardiovascular diseases[J]. Pharmacol Res, 2021, 166:105466. doi:10.1016/j.phrs.2021.105466 |
| 17 | SUN Y, CHEN P, ZHAI B, et al. The emerging role of ferroptosis in inflammation[J]. Biomed Pharmacother, 2020, 127:110108. doi:10.1016/j.biopha.2020.110108 |
| 18 | 王晓燕, 邹小义, 祝翔, 等. 铁超载调控氧化性低密度脂蛋白诱导泡沫细胞促动脉粥样硬化活化的作用[J]. 实用医学杂志, 2024, 40(3):295-301. doi:10.3969/j.issn.1006-5725.2024.03.003 |
| 19 | BAI T, LI M, LIU Y, et al. Inhibition of ferroptosis alleviates atherosclerosis through attenuating lipid peroxidation and endothelial dysfunction in mouse aortic endothelial cell[J]. Free Radic Biol Med, 2020, 160:92-102. doi:10.1016/j.freeradbiomed.2020.07.026 |
| 20 | 刘洋, 孙岳, 杨安宁, 等. 铁死亡参与高脂饮食诱导的ApoE(-/-)小鼠动脉粥样硬化及ox-LDL诱导的泡沫细胞形成过程[J]. 实用医学杂志, 2021, 37(5):585-590. |
| 21 | MARTINET W, COORNAERT I, PUYLAERT P, et al. Macrophage Death as a Pharmacological Target in Atherosclerosis[J]. Front Pharmacol, 2019, 10:306. doi:10.3389/fphar.2019.00306 |
| 22 | GAO D, HU L, LV H, et al. Ferroptosis Involved in Cardiovascular Diseases: Mechanism Exploration of Ferroptosis' Role in Common Pathological Changes[J]. J Cardiovasc Pharmacol, 2024, 83(1):33-42. doi:10.1097/fjc.0000000000001507 |
| 23 | WU M, HUANG Z, ZENG L, et al. Programmed Cell Death of Endothelial Cells in Myocardial Infarction and Its Potential Therapeutic Strategy[J]. Cardiol Res Pract, 2022, 2022:6558060. doi:10.1155/2022/6558060 |
| 24 | WANG W, LIU W, FIDLER T, et al. Macrophage Inflammation, Erythrophagocytosis, and Accelerated Atherosclerosis in Jak2 V617F Mice[J]. Circ Res, 2018, 123(11):e35-e47. doi:10.1161/circresaha.118.313283 |
| 25 | WEI J, ZHANG Y, LI H, et al. Toll-like receptor 4: A potential therapeutic target for multiple human diseases[J]. Biomed Pharmacother, 2023, 166:115338. doi:10.1016/j.biopha.2023.115338 |
| 26 | BAGHERI B, KHATIBIYAN FEYZABADI Z, NOURI A, et al. Atherosclerosis and Toll-Like Receptor4 (TLR4), Lectin-Like Oxidized Low-Density Lipoprotein-1 (LOX-1), and Proprotein Convertase Subtilisin/Kexin Type9 (PCSK9)[J]. Mediators Inflamm, 2024, 2024:5830491. doi:10.1155/2024/5830491 |
| 27 | DUFRUSINE B, FRANCESCO D A, ODDI S, et al. Iron-Dependent Trafficking of 5-Lipoxygenase and Impact on Human Macrophage Activation[J].Front Immunol, 2019, 10:1347. doi:10.3389/fimmu.2019.01347 |
/
| 〈 |
|
〉 |