中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (51): 8259-8265.doi: 10.3969/j.issn.2095-4344.2015.51.011

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

衣霉素海马内给药诱导海马神经元死亡的新现象与假说

袁 磊1,2,邓思敏3,张海霞1,钱诗蕾1,徐 斌1,龚济钦1,曾 杰1,潘 娟4,刘宏哲2,胡明华1,吴长初1   

  1. 1长沙医学院湖南省重点建设学科人体解剖与组织胚胎学教研室和重点实验室,湖南省长沙市 410219;湖南省人民医院,2脊柱外科, 4心内科,湖南省长沙市 410005;3上海交通大学附属第六人民医院,上海市 200233
  • 收稿日期:2015-10-24 出版日期:2015-12-10 发布日期:2015-12-10
  • 通讯作者: 吴长初,副教授,长沙医学院湖南省重点建设学科人体解剖与组织胚胎学教研室和重点实验室,湖南省长沙市 410219
  • 作者简介:袁磊,男,1991年生,湖南省绥宁县人,汉族, 2015年长沙医学院毕业,现任湖南省人民医院骨科中心住院医师。
  • 基金资助:

    国家自然科学基金项目(81171136);湖南省大学生研究性学习和创新性实验计划项目(湘教通[2013]191号-431, 湘教通[2012]402号-445);湖南省高等学校科学研究项目重点项目(10A013);湖南省高等学校“十二五”重点学科专项建设项目(湘教发[2011]76号)

Tunicamycin-induced neuronal death in the hippocampus: new phenomenon and new hypothesis

Yuan Lei1, 2, Deng Si-min3, Zhang Hai-xia1, Qian Shi-lei1, Xu Bin1, Gong Ji-qin1, Zeng Jie1, Pan Juan4,
Liu Hong-zhe2, Hu Ming-hua1, Wu Chang-chu1   

  1. 1Hunan Provincial Key Laboratory of Human Anatomy and Histoembryology, Key Disciplines in Hunan Province, Changsha Medical University, Changsha 410219, Hunan Province, China; 2Department of Spine Surgery, Hunan Provincial People’s Hospital, Changsha 410005, Hunan Province, China; 3the Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, China; 4Department of Cardiology, Hunan Provincial People’s Hospital, Changsha 410005, Hunan Province, China
  • Received:2015-10-24 Online:2015-12-10 Published:2015-12-10
  • Contact: Wu Chang-chu, Associate professor, Hunan Provincial Key Laboratory of Human Anatomy and Histoembryology, Key Disciplines in Hunan Province, Changsha Medical University, Changsha 410219, Hunan Province, China
  • About author:Yuan Lei, Physician, Hunan Provincial Key Laboratory of Human Anatomy and Histoembryology, Key Disciplines in Hunan Province, Changsha Medical University, Changsha 410219, Hunan Province, China; Department of Spine Surgery, Hunan Provincial People's Hospital, Changsha 410005, Hunan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81171136; Research Learning and Innovative Experiment Project of Undergraduates in Hunan Province, No. [2013]191-431, [2012]402-445; the Scientific Research Project of Higher Education in Hunan Province, No. 10A013; the Key Discipline Construction Project in Higher Education of Hunan Province during the Twelfth Five-Year Period, No. [2011]76

摘要:

背景:海马内注射衣霉素和红藻氨酸均可诱导内质网应激介导海马神经元凋亡,但两者大有不同。
目的:比较海马CA1区内注射红藻氨酸和衣霉素后不同时间段海马神经元的死亡情况。
方法:将96只成年雄性昆明小白鼠随机分为PBS组、红藻氨酸组和衣霉素组,海马CA1区分别注射红藻氨酸、衣霉素和PBS。
结果与结论:Fluoro-Jade B染色显示,红藻氨酸组小白鼠注射后2,3,4,5,6,8 h损伤侧出现海马神经元死亡明显。衣霉素组小白鼠注射后4 h损伤侧CA1区可见神经元明显死亡,对侧无明显死亡;衣霉素组小白鼠注射后5 h损伤侧CA1-3区未见神经元明显死亡,但对侧CA1-3区可见大量神经元死亡。免疫组化染色显示,衣霉素组小白鼠注射后4,5 h神经元死亡明显区域内磷酸化真核翻译起始因子2α的表达明显上调。结果提示海马内注射衣霉素后5 h出现海马神经元同侧给药对侧死亡的现象,是由于海马内注射衣霉素后随着药物浓度的扩散在4.0-5.0 h间神经元凋亡可能有一个由同侧向对侧迅速蔓延的过程,这是不同于红藻氨酸海马内注射诱导神经元死亡过程的又一新现象。
 

关键词: 组织构建, 组织工程, 衣霉素, 红藻氨酸, 海马, 脑立体定位, 免疫组化, Bederson体征评分, 磷酸化真核翻译起始因子2α, 国家自然科学基金

Abstract:

BACKGROUND: Although both tunicamycin and kainic acid can induce neuronal apoptosis in the hippocampus, their processes are very different.
OBJECTIVE: To compare the death of hippocampal neurons induced by injection of tunicamycin and kainic acid into the hippocampal CA1 region.
METHODS: Ninety-six adult male Kunming mice were randomized into PBS, tunicamycin and kainic acid groups, and then subjected to microinjections of PBS, tunicamycin and kainic acid into the hippocampus, respectively.
 
RESULTS AND CONCLUSION: Fluoro-Jade B staining showed that at 2, 3, 4, 5, 6 and 8 hours after kainic acid injection, hippocampal neurons appeared to have obvious death at the injured CA1 region; at 4 hours after tunicamycin injection, neuronal death was visible at the injured CA region rather than at the contralateral CA1 region; at 5 hours after tunicamycin injection, there were a large of dead neurons in the contralateral CA1 region rather than at the injured CA1 region. Immunohistochemical staining showed that the expression of phosphorylated eukaryotic initiation factor 2α at the apoptotic region was up-regulated significantly at 4 and 5 hours after tunicamycin injection. These findings indicate that with the diffusion of tunicamycin concentration, the neuronal apoptosis may have a trend to spread rapidly from the ipsilateral to the contralateral CA1 region at 4-5 hours after hippocampal injection of tunicamycin, and this process is a new discovery that is different from kainic acid-induced hippocampal neuron apoptosis. 

 

中图分类号: