中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (20): 3218-3223.doi: 10.3969/j.issn.2095-4344.0288

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

持续高血糖模型小鼠大脑皮质血管周围星形胶质细胞足突的变化

黄  燕1,何  婧1,向  阳2,王志强2,杜  果2,王庆松1,2   

  1. 1西南医科大学临床医学院,四川省泸州市  646000;2中国人民解放军成都军区总医院神经内科,四川省成都市  610083
  • 收稿日期:2018-04-28 出版日期:2018-07-18 发布日期:2018-07-18
  • 通讯作者: 王庆松,博士后,教授,主任医师,博士生导师,西南医科大学临床医学院, 四川省泸州市 646000;中国人民解放军成都军区总医院神经内科,四川省成都市 610083
  • 作者简介:黄燕,女,1989年生,四川省自贡市人,汉族,西南医科大学在读硕士,主要从事脑血管病的临床及基础的研究。
  • 基金资助:

    国家自然科学基金青年项目(81601112);四川省卫计委科学研究项目(16PJ014)

Changes of perivascular astrocyte foot process in the cerebral cortex of a mouse model of sustained hyperglycemia

Huang Yan1, He Jing1, Xiang Yang2, Wang Zhi-qiang2, Du Guo2, Wang Qing-song1, 2   

  1. 1Clinical Medical College of Southwest Medical University, Luzhou 646000, Sichuan Province, China; 2Department of Neurology, Chengdu Military General Hospital, Chengdu 610083, Sichuan Province, China
  • Received:2018-04-28 Online:2018-07-18 Published:2018-07-18
  • Contact: Wang Qing-song, M.D., Professor, Chief physician, Doctoral supervisor, Clinical Medical College of Southwest Medical University, Luzhou 646000, Sichuan Province, China; Department of Neurology, Chengdu Military General Hospital, Chengdu 610083, Sichuan Province, China
  • About author:Huang Yan, Master candidate, Clinical Medical College of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:

    the National Natural Science Foundation for the Youth of China, No. 81601112; the Science Research Foundation of the Health and Family Planning Commission of Sichuan Province, No. 16PJ014

摘要:

文章快速阅读:

文题释义:
建立持续性高血糖小鼠模型:先予以50 mg/kg链脲佐菌素连续5 d腹腔注射,诱导胰岛细胞β大量的破坏,建立高血糖模型,然后长达4个月予以普通饮食喂养,该方法主要模拟持续性高血糖状态对机体的生理病理影响。
胶质血管连接:血管周围星形胶质细胞足突上表达的水通道蛋白4通过肌营养不良相关蛋白复合物镶嵌在微血管基底膜上组成胶质血管连接结构和神经血管单元,维持大脑内环境稳定,调节脑血流量及血脑屏障的通透性,在脑微血管病变中具有重要的作用。
摘要
背景
:持续高血糖可致脑微血管病变及周围神经变病,显著增加脑卒中及神经功能失调的风险。神经血管结构功能紊乱尤其是血管周围星形胶质细胞足突在其发病机制可能中起着至关重要的作用。
目的:观察持续高血糖小鼠大脑皮质血管周围星形胶质细胞足突及胶质血管的变化特点及规律,探讨高血糖致脑微血管病变的相关机制。
方法:取成年雄性昆明小鼠20只,随机分为对照组和高血糖组,每组10只。以50 mg/kg链脲佐菌素连续5 d腹腔注射制作高血糖模型。采用免疫荧光双重标记星形胶质细胞足突水通道蛋白4及血管基底膜Ⅳ型胶原蛋白观察胶质血管及血管周围星形胶质细胞足突的变化;采用免疫组化法检测星形胶质细胞足突水通道蛋白4及血管基底膜Ⅳ型胶原蛋白水平变化。
结果与结论:①与对照组相比,高血糖组星形胶质细胞足突水通道蛋白4与血管基底膜Ⅳ型胶原蛋白共定位比例减少,星形胶质细胞与血管基底膜分离(P < 0. 05),且水通道蛋白4和Ⅳ型胶原蛋白的表达量均减少(P < 0. 05);②与对照组相比,免疫组化法显示高血糖组血管周围星形胶质细胞足突水通道蛋白4和血管基底膜Ⅳ型胶原蛋白表达量减少(P < 0.05);③结果提示,持续高血糖可致胶质血管破坏、神经血管单元和血脑屏障改变,其机制可能与血管周围星形胶质细胞足突水通道蛋白4减少有关。

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
ORCID: 0000-0002-8457-5893(黄燕)

关键词: 高血糖, 星形胶质细胞足突, 水通道蛋白4, 血管基底膜, 胶质血管连接, 神经血管单元, 链脲佐菌素, 随机血糖, Ⅳ型胶原蛋白, 2型糖尿病, 血脑屏障, 国家自然科学基金

Abstract:

BACKGROUND: Sustained hyperglycemia can induce cerebral microvascular disease and peripheral neuropathy, which significantly increases the risk of stroke and neurological dysfunction. Astrocyte foot process around the cerebral microvessels may play a vital role in the pathogenesis of sustained gyperglycemia.
OBJECTIVE: To observe the changes of perivascular astrocyte foot process and gliovascular interface in cerebral cortex of mice with sustained hyperglycemia, and to investigate the mechanism of hyperglycemia-induced cerebral microvascular diseases.
METHODS: Twenty healthy adult male Kunming mice were randomly divided into two groups: control group and hyperglycemia group. The hyperglycemia was induced by intraperitioneal injection of streptozotocin (50 mg/kg) for 5 consecutive days. The expression levels of aquaporin-4 in the astrocyte foot process and collagen type IV in the vascular basement membrane were detected by double immunofluorescent staining to observe the changes in perivascular astrocyte foot process and gliovascular interface. The expression levels of aquaporin-4 in the astrocyte foot process and collagen type IV in the vascular basement membrane were determined by immunohistochemistry.
RESULTS AND CONCLUSION: Compared with the control group, in the hyperglycemia group, there was a significant decrease in the colocalization of aquaporin-4 in the astrocyte foot process and collagen type IV in the vascular basement membrane (P < 0.05), and the expression levels of aquaporin-4 and collagen type IV were significantly decreased (P < 0.05). Immunohistochemistry results showed that the expression levels of aquaporin-4 in the astrocyte foot process and collagen type IV in the vascular basement membrane in the hyperglycemia group were significantly lower than those in the control group (P < 0.05). These results indicate that sustained hyperglycemia can destroy gliovascular interface, and result in neurovascular unit and blood brain barrier dysfunction, probably by reducing the expression level of aquaporin-4 in the astrocyte foot process.

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

Key words: Hyperglycemia, Basilar Membrane, Models, Animal, Tissue Engineering

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