中国神经再生研究(英文版) ›› 2014, Vol. 9 ›› Issue (4): 430-435.doi: 10.4103/1673-5374.128255

• 原著:退行性病与再生 • 上一篇    下一篇

7.0T核磁共振评价阿尔茨海默病动物模型:细胞学验证的比较

  

  • 收稿日期:2013-11-25 出版日期:2014-02-25 发布日期:2014-02-25
  • 基金资助:

    国家自然科学基金(81141013);北京市优秀人才(2011D003034000019)

7.0T nuclear magnetic resonance evaluation of the amyloid beta (1–40) animal model of Alzheimer’s disease: comparison of cytology verification

Lei Zhang1, Shuai Dong2, Guixiang Zhao3, Yu Ma4   

  1. 1 MR Neuroradiology Room, Beijing Tiantan Hospital Affiliated to Capital Medical University, Beijing, China
    2 Department of Neurology, Sixth People’s Hospital of Jinan, Jinan, Shandong Province, China
    3 Department of Rehabilitation Medicine, Sixth People’s Hospital of Jinan, Jinan, Shandong Province, China
    4 Tsinghua University Yuquan Hospital, Beijing, China
  • Received:2013-11-25 Online:2014-02-25 Published:2014-02-25
  • Contact: Yu Ma, M.D., Tsinghua University Yuquan Hospital, Beijing 100049, China, lymayu@163.com.
  • Supported by:

    This study was supported by the National Natural Science Foundation of China, No. 81141013; a grant for Talents in Beijing, No. 2011D003034000019.

摘要:

3.0T磁共振波谱成像已用于阿尔茨海默病脑功能的研究,但7.0T高场强磁共振波谱成像适用于阿尔茨海默病的脑功能研究会有哪些更好的优势?以此为目的,实验应用7.0T磁共振波谱成像见阿尔茨海默病大鼠海马区N-乙酰天冬氨酸波峰减低,肌酸及胆碱波峰升高,与苏木精-伊红染色证实海马区神经元的缺失与胶质细胞增生,电镜结果示神经元固缩、线粒体嵴部分断裂,透射电镜扫描证实的大鼠海马神经元突触小泡体积变小,突触结构不完整及数量明显减少相符合。提示7.0T高场强核磁共振波谱分析能够有效的在活体检测阿尔茨海默病模型大鼠海马区神经元的病变及功能改变,为正确评估阿尔茨海默病动物模型制作成功率和进行模型分级提供可能。

关键词: 阿尔茨海默病, Aβ1-40, 高场强功能核磁, 核磁共振波谱, 神经病理, N-乙酰天冬氨酸, 肌酸, 胆碱, 海马

Abstract:

3.0T magnetic resonance spectroscopic imaging is a commonly used method in the research of brain function in Alzheimer’s disease. However, the role of 7.0T high-field magnetic resonance spectroscopic imaging in brain function of Alzheimer’s disease remains unclear. In this study, 7.0T magnetic resonance spectroscopy showed that in the hippocampus of Alzheimer’s disease rats, the N-acetylaspartate wave crest was reduced, and the creatine and choline wave crest was elevated. This finding was further supported by hematoxylin-eosin staining, which showed a loss of hippocampal neurons and more glial cells. Moreover, electron microscopy showed neuronal shrinkage and mitochondrial rupture, and scanning electron microscopy revealed small size hippocampal synaptic vesicles, incomplete synaptic structure, and reduced number. Overall, the results revealed that 7.0T high-field nuclear magnetic resonance spectroscopy detected the lesions and functional changes in hippocampal neurons of Alzheimer’s disease rats in vivo, allowing the possibility for assessing the success rate and grading of the amyloid beta (1–40) animal model of Alzheimer’s disease.

Key words: nerve regeneration, Alzheimer’s disease, Aβ1–40, high-field functional magnetic resonance, nuclear magnetic resonance spectroscopy, neuropathology, N-acetylaspartate, creatine, choline, hippocampus, NSFC grant, neural regeneration