中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (2): 237-241.doi: 10.12307/2023.898

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

链脲佐菌素诱导糖尿病脑病大鼠模型的构建及评价

陈思敏1,2,胡颖俊1,闫文睿1,冀  乐1,邵梦丽1,孙  泽1,3,郑红星1,4,祁珊珊1,2   

  1. 陕西理工大学,1生物科学与工程学院,2秦巴生物资源与生态环境省部共建国家重点实验室(培育),陕西省汉中市  723000;3陕西省资源生物重点实验室,陕西省汉中市  723000;4陕西省黑色有机食品工程技术研究中心,陕西省汉中市  723000
  • 收稿日期:2022-11-01 接受日期:2022-12-24 出版日期:2024-01-18 发布日期:2023-06-30
  • 通讯作者: 祁珊珊,博士,教授,硕士生导师,陕西理工大学生物科学与工程学院,秦巴生物资源与生态环境省部共建国家重点实验室(培育),陕西省汉中市 723000
  • 作者简介:陈思敏,女,1997年生,陕西省汉中市人,汉族,陕西理工大学在读硕士,主要从事天然产物药理研究。
  • 基金资助:
    陕西省科技厅面上项目(2020JM-601),项目负责人:祁珊珊;陕西省教育厅重点研发项目(20JY005),项目负责人:祁珊珊;秦巴生物资源与生态环境国家重点实验室项目(SXC-2013),项目负责人:郑红星;中国富硒产业研究院富硒专项研发项目(2021FXZX06),项目负责人:祁珊珊;陕西省科技厅农业类一般项目(2023-YBNY-185),项目负责人:郑红星

Establishment and evaluation of a streptozotocin-induced diabetic encephalopathy rat model

Chen Simin1, 2, Hu Yingjun1, Yan Wenrui1, Ji Le1, Shao Mengli1, Sun Ze1, 3, Zheng Hongxing1, 4, Qi Shanshan1, 2   

  1. 1College of Biological Science and Engineering, 2Qinba State Key Laboratory of Biological Resources and Ecological Environment, Shaanxi University of Technology, Hanzhong 723000, Shaanxi Province, China; 3Shaanxi Province Key Laboratory of Bio-resources, Hanzhong 723000, Shaanxi Province, China; 4Shaanxi Black Organic Food Engineering Technology Research Center, Hanzhong 723000, Shaanxi Province, China
  • Received:2022-11-01 Accepted:2022-12-24 Online:2024-01-18 Published:2023-06-30
  • Contact: Qi Shanshan, MD, Professor, Master’s supervisor, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi Province, China; Qinba State Key Laboratory of Biological Resources and Ecological Environment, Shaanxi University of Technology, Hanzhong 723000, Shaanxi Province , China
  • About author:Chen Simin, Master candidate, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi Province, China; Qinba State Key Laboratory of Biological Resources and Ecological Environment, Shaanxi University of Technology, Hanzhong 723000, Shaanxi Province, China
  • Supported by:
    Shaanxi Provincial Science and Technology Department (General Program), No. 2020JM-601 (to QSS); Key Research and Development Project of Shaanxi Provincial Education Department, No. 20JY005 (to QSS); State Key Laboratory of Qinba Biological Resources and Ecological Environment Project, No. SXC-2013 (to ZHX); China Selenium Enriched Industry Research Institute Special R&D Project for Selenium Enrichment, No. 2021FXZX06 (to QSS); Shaanxi Provincial Department of Science and Technology General Project for Agriculture, No. 2023-YBNY-185 (to ZHX)

摘要:


文题释义:

糖尿病脑病:是由糖尿病引发的中枢神经系统病变,导致大脑萎缩、神经元结构和功能受损,神经生理改变及认知功能障碍。糖尿病脑病的发生与慢性高血糖造成的脑组织氧化应激、神经炎症及神经细胞凋亡有关。
链脲佐菌素诱导糖尿病脑病模型:链脲佐菌素可用于诱导啮齿类动物患糖尿病,其对胰岛β细胞具有特异性毒性,引起胰岛素合成减少。随着对糖尿病脑病研究的深入,确定其具体的发病机制和防治方法就成了关注的重点,因此糖尿病脑病疾病动物模型的构建十分必要。


背景:目前研究较成熟的糖尿病脑病模型主要有链脲佐菌素诱导模型、高糖高脂饮食诱导模型和自发性动物模型。建立简便易行、周期短、安全有效的糖尿病脑病模型对其发病机制的深入探讨和治疗药物的筛选有重要的作用。

目的:进一步验证链脲佐菌素诱导糖尿病脑病大鼠模型的方法并对其进行评价。
方法:将20只SD大鼠随机分为对照组(n=10)和模型组(n=10),模型组大鼠左下腹腔一次性注射45 mg/kg链脲佐菌素建立糖尿病实验动物模型,对照组大鼠用等量的柠檬酸缓冲液代替注射。实验期间监测大鼠体质量、饮食量、饮水量和血糖,8周后检测葡萄糖耐量和氧化应激水平,并比较脑组织病理变化及凋亡蛋白的表达情况。

结果与结论:①与对照组相比,模型组大鼠饮食量、饮水量、脑指数、血糖和血糖曲线下面积显著升高、体质量明显下降(P < 0.01);②脑组织病理学显示,模型组大鼠存活神经细胞数量明显减少(P < 0.01),神经细胞病理损伤明显高于对照组;③模型组大鼠较对照组血清超氧化物歧化酶、过氧化氢酶和谷胱甘肽活力均明显降低(P < 0.01),氧化活性丙二醛的浓度明显升高(P < 0.05);④脑组织中凋亡相关蛋白Bax和Caspase-3表达水平增加,Bcl-2表达水平降低(P < 0.01);⑤结果说明,注射45 mg/kg链脲佐菌素8周后可以使糖尿病大鼠脑组织有明显的病理损伤,成功构建糖尿病脑病大鼠模型。

https://orcid.org/0000-0001-7744-3529(陈思敏);https://orcid.org/0000-0003-1636-3060(祁珊珊)

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: 糖尿病脑病, 链脲佐菌素, 动物模型, 脑组织, 大鼠, 高血糖, 氧化应激, 神经细胞凋亡

Abstract: BACKGROUND: Animal models of diabetic encephalopathy that have been studied mainly include streptozotocin-induced model, high-sugar and high-fat diet-induced model and spontaneous animal model. Establishing a simple, easy, short-cycle, safe and effective model of diabetic encephalopathy can help to explore the subsequent pathogenesis and screen therapeutic drugs. 
OBJECTIVE: To further explore and evaluate the method of building diabetic encephalopathy rat models.
METHODS: Twenty Sprague-Dawley rats were randomly divided into control (n=10) and model (n=10) groups. Rats in the model group were given a single injection of 45 mg/kg streptozotocin in the left lower abdominal cavity, and those in the control group were given the same amount of citrate buffer. During the experiment, the body mass, feed intake, water intake and blood glucose were measured. After 8 weeks, the glucose tolerance and oxidative stress levels were measured, and the pathological changes of brain tissue and the expression of apoptotic proteins were compared between groups.
RESULTS AND CONCLUSION: Compared with the control group, the food intake, water intake, encephalization quotient, blood glucose and area under the blood glucose curve were significantly increased in the model group, while the body mass decreased significantly (P < 0.01). Histopathological examination of the brain showed that compared with the control group, the number of surviving nerve cells was significantly reduced in the model group (P < 0.01), with more significant pathological damage of nerve cells. Compared with the control group, the activities of serum superoxide dismutase, catalase and glutathione in the model group were significantly decreased (P < 0.01), and the content of oxidative malondialdehyde was significantly increased (P < 0.05). The expression levels of apoptosis-related proteins Bax and Caspase-3 in brain tissue increased in the model group compared with the control group, while the expression of Bcl-2 decreased (P < 0.01). In conclusion, an 8-week injection of 45 mg/kg streptozotocin can cause obvious pathological damage to the brain tissue of diabetic rats, to successfully establish the rat model of diabetic encephalopathy.

Key words: diabetic encephalopathy, streptozotocin, animal model, brain tissue, rat, high blood glucose, oxidative stress, neuronal cell apoptosis

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