中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (25): 5335-5344.doi: 10.12307/2025.525

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芦荟素减轻大鼠心肌细胞缺氧损伤:抑制氧化应激和铁死亡

谭铭月1,金奕丰2,张  俊1,李红霞1   

  1. 苏州大学附属第一医院,1心血管内科,2全科医学科,江苏省苏州市   215006
  • 收稿日期:2024-03-26 接受日期:2024-06-11 出版日期:2025-09-08 发布日期:2024-12-21
  • 通讯作者: 李红霞,主任技师,苏州大学附属第一医院心血管内科,江苏省苏州市 215006
  • 作者简介:谭铭月,女,1994年生,四川省广安市人,汉族,硕士,医师,主要从事心肌梗死、心肌缺血再灌注损伤及相关基础研究。
  • 基金资助:
    国家自然科学基金项目(81100173),项目负责人:李红霞

Aloin mitigates hypoxic injury in rat cardiomyocytes: inhibiting oxidative stress and ferroptosis

Tan Mingyue1, Jin Yifeng2, Zhang Jun1, Li Hongxia1   

  1. 1Department of Cardiology, 2Department of General Medicine, First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
  • Received:2024-03-26 Accepted:2024-06-11 Online:2025-09-08 Published:2024-12-21
  • Contact: Li Hongxia, Chief technician, Department of Cardiology, First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
  • About author:Tan Mingyue, Master, Physician, Department of Cardiology, First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 81100173 (to LHX)

摘要:

文题释义:

芦荟素:一种从芦荟中提取的蒽醌化合物,具有抗炎、抗氧化、抗肿瘤等多种生物活性,在肺损伤、心肌缺血再灌注损伤、肝脏纤维化、非酒精性肝炎等疾病的动物模型中均发挥保护作用。
心肌细胞缺氧损伤:由于各种原因导致冠状动脉血流量降低,使得心肌细胞的氧供应不足和代谢产物清除减少,这种状态会触发一系列复杂的生物学反应,包括炎症反应、氧化应激以及细胞死亡等,这些过程相互作用,加剧心肌细胞的损伤,进而影响心脏的正常
功能。

摘要
背景:心肌细胞缺氧损伤与氧化应激和铁死亡密切有关。既往研究表明芦荟素具有抗氧化、抗炎、抗肿瘤等多种作用。
目的:探讨芦荟素对缺氧诱导的H9C2细胞氧化应激及铁死亡的影响。
方法:利用H9C2细胞构建缺氧模型,首先通过检测细胞活性,确定芦荟素无细胞毒性及最佳干预浓度。随后,利用试剂盒、超氧化物阴离子荧光探针及MitoSOXTM Red荧光探针,分别评估芦荟素对缺氧诱导的H9C2细胞乳酸脱氢酶释放、活性氧产生以及线粒体氧化应激的影响。为了验证芦荟素对铁死亡的影响,采用荧光染色和流式细胞术,分别检测细胞内Fe2+的含量和脂质过氧化程度。接着,利用蛋白免疫印迹和实时荧光定量PCR技术,检测铁死亡调节因子(谷胱甘肽过氧化物酶4、酰基辅酶A合成酶长链家族成员4和核因子E2相关因子2)的表达。最后,通过运用铁死亡诱导剂Erastin,进一步确认铁死亡在芦荟素介导心肌保护过程中的重要作用。

结果与结论:①与对照组相比,缺氧组H9C2细胞活力显著降低,乳酸脱氢酶释放、活性氧水平、线粒体氧化应激程度、Fe2+含量及脂质过氧化程度显著上升,谷胱甘肽过氧化物酶4、核因子E2相关因子2的mRNA和蛋白表达明显降低,酰基辅酶A合成酶长链家族成员4的mRNA和蛋白表达显著升高(均P < 0.05);②与缺氧组比较,芦荟素低、高剂量组逆转了上述指标变化(均P < 0.05);③与缺氧+芦荟素组相比,缺氧+芦荟素+Erastin组H9C2细胞活力明显下降,乳酸脱氢酶释放显著升高(均P < 0.01)。结果表明,芦荟素对缺氧处理的H9C2细胞具有保护作用,且呈剂量依赖性,主要通过抑制氧化应激和铁死亡实现的。

https://orcid.org/0009-0002-4473-0120 (谭铭月) 



中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 芦荟素, 心肌细胞缺氧损伤, 氧化应激, 铁死亡, 线粒体

Abstract: BACKGROUND: Myocardial cell hypoxic injury is closely associated with oxidative stress and ferroptosis. Previous studies have shown that aloin has various effects such as antioxidant, anti-inflammatory, and anti-tumor activities.
OBJECTIVE: To investigate the effects of aloin on oxidative stress and ferroptosis in hypoxia-induced H9C2 cells.
METHODS: A hypoxia model was established using H9C2 myocardial cells. Firstly, cell viability was determined to confirm the lack of cytotoxicity of aloin and to determine its optimal therapeutic concentration. Subsequently, the effects of aloin on hypoxia-induced lactate dehydrogenase release, reactive oxygen species production, and mitochondrial oxidative stress in H9C2 cells were evaluated using assay kits, dihydroethidium fluorescent probes, and MitoSOX™ Red fluorescent probes, respectively. To verify the effect of aloin on ferroptosis, intracellular Fe2+ content and lipid peroxidation level were detected using fluorescence staining and flow cytometry, respectively. Then, the expression levels of ferroptosis regulatory factors glutathione peroxidase 4, acyl-CoA synthetase long-chain family member 4, and nuclear factor E2-related factor 2 were detected using western blot assay and real-time fluorescence quantitative PCR techniques. Finally, the role of ferroptosis in aloin-mediated myocardial protection was further confirmed by using the ferroptosis inducer Erastin.
RESULTS AND CONCLUSION: (1) Compared with the control group, the viability of H9C2 cells in the hypoxia group was significantly decreased, lactate dehydrogenase release, reactive oxygen species level, mitochondrial oxidative stress degree, Fe2+ content, and lipid peroxidation degree were significantly increased, while glutathione peroxidase 4 and nuclear factor E2-related factor 2 mRNA and protein expression levels were significantly decreased, and acyl-CoA synthetase long-chain family member 4 mRNA and protein expression were significantly increased (all P < 0.05). (2) Compared with the hypoxia group, both low and high doses of aloin reversed the changes in above indicators (all P < 0.05). (3) Compared with the hypoxia+aloin group, the hypoxia+aloin+Erastin group showed a significant decrease in H9C2 cell viability and a significant increase in lactate dehydrogenase release (both P < 0.01). The results indicate that aloin has a protective effect on hypoxia-treated H9C2 cells in a dose-dependent manner, mainly achieved by inhibiting oxidative stress and ferroptosis.

Key words: aloin, myocardial cell hypoxic injury, oxidative stress, ferroptosis, mitochondria

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