中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (26): 5572-5578.doi: 10.12307/2025.771

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

大黄素促进自噬改善脓毒症模型小鼠的心肌损伤

田  勇,周  庆,罗传权,胡红梅,麻长林,杨  蕾,韦  林   

  1. 铜仁市人民医院重症医学科,贵州省铜仁市  554300



  • 收稿日期:2024-09-04 接受日期:2024-10-16 出版日期:2025-09-18 发布日期:2025-02-25
  • 通讯作者: 韦林,主任医师,教授,铜仁市人民医院重症医学科,贵州省铜仁市 554300
  • 作者简介:田勇,男,1987年生,贵州省印江县人,土家族,2024年贵州医科大学毕业,硕士,主治医师,主要从事重症感染、自噬的相关研究。
  • 基金资助:
    贵州省中医药管理局中医药、民族医药科学技术课题研究资助(QZYY-2024-047),项目负责人:田勇;铜仁市科技计划项目(铜市科研〔2023〕30号),项目负责人:田勇;贵州省科技计划项目(黔科合支持[2021]一般092),项目负责人:麻长林

Emodin promotes autophagy to improve myocardial injury in septic model mice

Tian Yong, Zhou Qing, Luo Chuanquan, Hu Hongmei, Ma Changlin, Yang Lei, Wei Lin   

  1. Department of Critical Care Medicine, Tongren People’s Hospital, Tongren 554300, Guizhou Province, China
  • Received:2024-09-04 Accepted:2024-10-16 Online:2025-09-18 Published:2025-02-25
  • Contact: Wei Lin, Chief physician, Professor, Department of Critical Care Medicine, Tongren People’s Hospital, Tongren 554300, Guizhou Province, China
  • About author:Tian Yong, MS, Attending physician, Department of Critical Care Medicine, Tongren People’s Hospital, Tongren 554300, Guizhou Province, China
  • Supported by:
    Guizhou Provincial Administration of Traditional Chinese Medicine Chinese Medicine, Ethnic Medicine Science and Technology Research Funding, No. QZYY-2024-047 (to TY); Tongren City Science and Technology Plan Project, No. [2023]30 (to TY); Guizhou Provincial Science and Technology Plan Project, No. [2021]092 (to MCL)

摘要:


文题释义:
大黄素:在虎杖、何首乌及大黄等中草药中含量丰富,它是一种典型的蒽醌类活性单体,具有抗炎、抗病毒、抗肿瘤及保护肝肾等多种药理作用,广泛用于肺癌、肝癌、结肠炎及胰腺炎等疾病的治疗。 
脓毒症心肌损伤:也称脓毒性心肌病/脓毒症心功能障碍,它是脓毒症引起的左心室和右心室收缩功能和(或)舒张功能障碍,具有可逆性,目前尚无统一的临床诊断标准,主要根据患者的影像学检查、生物学标志物、临床症状和体征等方面来综合判断。

背景:大黄素具有抗炎、抗病毒及抗氧化应激等多种药理活性,对脓毒症心肌损伤有一定的保护作用,但作用机制尚不清楚。
目的:探讨大黄素是否可通过促进自噬来改善脓毒症小鼠心肌损伤。
方法:将32只雄性昆明小鼠分为假手术组4只、假手术+大黄素组4只、模型组8只、模型+大黄素组8只、大黄素+3-甲基腺嘌呤组8只。采用盲肠结扎穿孔术构建脓毒症小鼠心肌损伤模型,在造模前1 h腹腔注射3-甲基腺嘌呤(10 mg/kg),在造模前30 min腹腔注射大黄素(20 mg/kg),其余各组在相同的时间点注射等量生理盐水。所有小鼠在术后24 h留取血液及心肌样本。ELISA检测血清中心肌损伤标志物脑钠肽、心肌肌钙蛋白I水平,Western blot检测心肌组织中LC3B、Beclin-1及p62的蛋白表达,苏木精-伊红染色观察心肌组织的病理变化,超声评估小鼠心脏功能。
结果与结论:①与假手术组相比,假手术+大黄素组血清脑钠肽、心肌肌钙蛋白I水平和心肌自噬蛋白LC3Ⅱ/LC3Ⅰ、p62蛋白表达均无统计学差异(P > 0.05);②与假手术+大黄素组相比,模型组血清脑钠肽、心肌肌钙蛋白I水平均显著升高(P < 0.05);与模型组相比,模型+大黄素组血清脑钠肽、心肌肌钙蛋白I水平均降低(P < 0.05);③与模型组相比,模型+大黄素组心肌组织中LC3Ⅱ/LC3Ⅰ、Beclin-1蛋白表达升高且p62蛋白表达降低(P < 0.05);与模型+大黄素组相比,大黄素+3-甲基腺嘌呤组LC3Ⅱ/LC3Ⅰ和Beclin-1蛋白表达降低且p62蛋白表达升高(P < 0.05);④假手术组心肌纤维正常,模型组心肌纤维紊乱伴大量炎症细胞浸润,模型+大黄素组心肌纤维稍紊乱,可见部分空泡状改变,大黄素+3-甲基腺嘌呤组心肌纤维排列紊乱,可见较多的炎症细胞浸润;⑤与假手术组相比,模型组左室短轴缩短率、左室射血分数均降低(P < 0.05);与模型组相比,模型+大黄素组左室短轴缩短率、左室射血分数均升高(P < 0.05);与模型+大黄素组相比,大黄素+3-甲基腺嘌呤组左室射血分数降低(P < 0.05),左室短轴缩短率降低但无统计学意义(P > 0.05);⑥以上结果表明,大黄素预处理可通过促进自噬改善脓毒症小鼠的心肌损伤和心肌功能障碍。
https://orcid.org/0009-0000-5657-6744(田勇)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 大黄素, 脓毒症, 脓毒症心肌损伤, 心功能, 自噬, 炎症反应, 保护作用, 工程化组织构建

Abstract: BACKGROUND: Emodin has a variety of pharmacological activities such as anti-inflammatory, anti-viral and anti-oxidative stress, and also has a certain protective effect on sepsis-induced myocardial injury, but its mechanism of action is still unclear.
OBJECTIVE: To investigate whether emodin can improve myocardial injury in septic mice by promoting autophagy.
METHODS: Thirty-two male Kunming mice were divided into sham operation group (n=4), sham operation+emodin group (n=4), model group (n=8), model+emodin group (n=8), and emodin+3-methyladenine group (n=8). The myocardial injury model of septic mice was constructed by cecal ligation and puncture. 3-methyladenine (10 mg/kg) was injected intraperitoneally 1 hour before modeling. Emodin (20 mg/kg) was injected intraperitoneally 30 minutes before modeling, and the other groups were injected with the same amount of normal saline at the same time point. Blood and myocardial samples were collected from all mice 24 hours after surgery. ELISA was used to detect the levels of brain natriuretic peptide and cardiac troponin I in serum. Western blot assay was used to detect the protein expression of LC3B, Beclin-1, and p62 in myocardial tissue. Hematoxylin-eosin staining was used to observe the pathological changes in myocardial tissue. Ultrasound was used to evaluate the cardiac function of mice.
RESULTS AND CONCLUSION: (1) Compared with the sham operation group, there was no significant difference in the levels of serum brain natriuretic peptide, cardiac troponin I, and the protein expression of myocardial autophagy proteins LC3II/LC3I and p62 in the sham operation+emodin group (P > 0.05). (2) Compared with the sham operation+emodin group, the levels of serum brain natriuretic peptide and cardiac troponin I were significantly increased in the model group (P < 0.05). Compared with the model group, the levels of serum brain natriuretic peptide and cardiac troponin I were decreased in the model+emodin group (P < 0.05). (3) Compared with the model group, the expression of LC3II/LC3I and Beclin-1 protein was increased and the expression of p62 protein was decreased in the myocardial tissue of the model+emodin group (P < 0.05). Compared with the model+emodin group, the expression of LC3II/LC3I and Beclin-1 protein decreased and the expression of p62 protein increased in the emodin+3-methyladenine group (P < 0.05). (4) The myocardial fibers in the sham operation group were normal, the myocardial fibers in the model group were disordered with a large number of inflammatory cell infiltration, the myocardial fibers in the model+emodin group were slightly disordered, and some vacuolar changes were observed. The myocardial fibers were disordered, and more inflammatory cell infiltration was observed in the emodin+3-methyladenine group. (5) Compared with the sham operation group, the left ventricular short axis shortening rate and left ventricular ejection fraction were decreased in the model group (P < 0.05). Compared with the model group, the left ventricular short axis shortening rate and left ventricular ejection fraction were increased in the model+emodin group (P < 0.05). Compared with the model+emodin group, the left ventricular ejection fraction of emodin+3-methyladenine group was decreased (P < 0.05), and the left ventricular short axis shortening rate was reduced but not statistically significant (P > 0.05). (6) The above results indicate that emodin pretreatment can improve myocardial injury and myocardial dysfunction in septic mice by promoting autophagy.

Key words: emodin, sepsis, sepsis-induced myocardial injury, cardiac function, autophagy, inflammatory reaction, protective effect, engineered tissue construction

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