新型小鼠动脉粥样硬化消退模型的构建
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(1.苏州大学医学部剑桥-苏大基因组资源中心,江苏省苏州市 215123;2.苏州大学唐仲英血液学研究中心,江苏省苏州市 215123;3.苏州大学卫生与环境技术研究所,江苏省苏州市 215123 ;4.苏州市血栓与血管生物学重点实验室,江苏省苏州市 215123;5.江苏省血液学协同创新中心,江苏省苏州市 215123)

作者简介:

吴凡,硕士,研究方向为动脉粥样硬化,E-mail为wufan9547@163.com。通信作者唐朝君,博士,副研究员,硕士研究生导师,研究方向为血管疾病机制研究与转化,E-mail为zjtang@suda.edu.cn。

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基金项目:

国家自然科学基金项目(81670134);江苏省自然科学基金项目(SBK2020021780)


The establishment of a novel model of atherosclerosis regression in ApoE-/- mice
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1.CAM-SU Genomic Resource Center, ;2.Cyrus Tang Hematology Center, ;3.Sanitation & Environment Technology Institute, ;4.Suzhou Key Laboratory of Thrombosis and Vascular Biology, ;5.Collaborative Innovation Center of Hematology of Jiangsu Province, Soochow University, Suzhou, Jiangsu 215123, China)

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    摘要:

    目的 动脉粥样硬化通常被认为是一种不断发展的病变,但斑块的消退提示动脉粥样硬化病变存在逆转的可能,因此建立一种高效且操作方便的小鼠动脉粥样硬化斑块消退模型对于阐明斑块消退的机制具有重要意义。方法 在ApoE-/-模型鼠中,首先进行三种类型的颈动脉结扎,诱导不同类型的血流形成颈动脉斑块。为了建立斑块消退模型,利用活结部分结扎小鼠左颈动脉分支造成扰动流,高脂饮食喂食2周诱导斑块形成后,打开活结,并恢复正常饮食。颈动脉血流超声检测追踪由结扎或斑块引起的血流变化;苏丹Ⅳ染色评估动脉粥样硬化病变区域;免疫荧光染色评估巨噬细胞浸润情况。结果 颈动脉部分结扎高脂饮食喂养2周后,扰动流模型诱导的动脉粥样硬化斑块面积最大。造模小鼠打开活结2周后,颈动脉血流恢复接近正常值;且可显著减少动脉粥样硬化斑块大小,同时斑块中巨噬细胞含量和血管腔内斑块面积也明显减少。结论 基于颈动脉结扎手术的新型小鼠动脉粥样硬化消退模型成功建立,利用该模型将帮助理解动脉粥样硬化消退的潜在机制。

    Abstract:

    Aim Atherosclerosis is a chronic inflammatory disease, but the regression of plaques suggests the possibility of reversal of atherosclerotic disease. Thus, the establishment of a model of atherosclerosis regression in mice is of great significance for elucidating the mechanism of plaque regression. Methods In ApoE-/- mice, three types of carotid ligation were performed to induce different types of blood flow. To establish the regression model, partial carotid ligation with a slipknot was firstly used to induce disturbed flow. After feeding on a high-fat diet for 2 weeks, the slipknot was removed, and followed by a chow diet for two weeks. The ultrasonic testing was performed to monitor the blood flow in real time caused afterligation or plaque formation; Sudan Ⅳ staining was used to assess atherosclerotic lesions; immunofluorescence staining with anti MOMA2 was applied to examine monocyte-macrophage infiltration. Results Three types of ligation induced different types of blood flow. The disturbed flow induced the largest atherosclerotic plaque area in ApoE-/- mice. After restore of blood flow combined with chow diet, atherosclerotic plaques can be significantly reduced and reversed, and the macrophage infiltration also significantly decreased. Conclusion A novel atherosclerosis regression model in mice based on carotid ligation surgery was successfully constructed, which will help to understand the underlying mechanism of atherosclerosis regression.

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吴凡,盛玉兰,梁羽,唐朝君.新型小鼠动脉粥样硬化消退模型的构建[J].中国动脉硬化杂志,2021,29(7):579~584.

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  • 收稿日期:2020-06-28
  • 最后修改日期:2020-09-15
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  • 在线发布日期: 2021-06-28