天津医药 ›› 2016, Vol. 44 ›› Issue (9): 1088-1091.doi: 10.11958/20160028

• 实验研究 • 上一篇    下一篇

美满霉素对阿尔茨海默病大鼠认知损伤及海马 BDNF、 Bcl-2 和 Bax 表达的影响

孙缦利, 邓海峰, 李明华, 刘国良, 常全忠△   

  1. 漯河医学高等专科学校基础医学部(邮编 462000)
  • 收稿日期:2016-01-22 修回日期:2016-05-18 出版日期:2016-09-15 发布日期:2016-09-28
  • 通讯作者: 孙缦利 E-mail:smlsmile@163.com
  • 作者简介:孙缦利(1987), 女, 讲师, 硕士, 主要从事脑认知功能的研究
  • 基金资助:
    漯河医学高等专科学校 2015 年度基础科学重点研究项目(2015-S-LMC06); 2015 年度河南省科技厅基础与前沿技术研究(152300410014);2014年度河南省科技厅自然科学项目资助(142300410431)

Effects of minocycline on the cognition and expression of BDNF, Bcl-2 and Bax in hippocampus of Alzheimer’ s disease model rats

SUN Manli, DENG Haifeng, LI Minghua, LIU Guoliang, CHANG Quanzhong△   

  1. School of Basic Medical Sciences, Luohe Medical College, Luohe 462000, China
  • Received:2016-01-22 Revised:2016-05-18 Published:2016-09-15 Online:2016-09-28

摘要: 目的 观察美满霉素对阿尔茨海默病(AD)大鼠认知功能和海马脑源性神经营养因子(BDNF)、凋亡相关因子 Bcl-2 和 Bax 表达的影响, 探讨美满霉素对 AD 大鼠脑保护作用的机制。 方法 侧脑室注射 Aβ25-35 建立 AD 大鼠模型。 30 只健康雄性 SD 大鼠随机分成对照组、模型组和治疗组, 每组 10 只。 对照组和模型组腹腔内注射生理盐水 1 mL/(kg· d), 治疗组腹腔注射美满霉素 50 mg/(kg· d), 均持续 14 d。 Morris 水迷宫检测行为学变化, 蛋白免疫印迹(Western blotting)法和酶联免疫吸附试验(ELISA)法检测海马 BDNF、Bcl-2 和 Bax 蛋白的表达, 原位末端标记(TUNEL)法检测海马神经元凋亡率。 结果 美满霉素可以明显提高 AD 大鼠学习记忆能力, 上调 AD 大鼠海马 BDNF、Bcl-2 表达, 下调 Bax 表达, 减少海马神经元凋亡。 结论 美满美素可以通过促进神经元的生长、抑制神经元的凋亡发挥脑保护作用。

关键词: 四环素类, 阿尔茨海默病, 细胞凋亡, 神经组织蛋白质类, 认知, 美满霉素, 脑源性神经营养因子

Abstract: Objective To investigate the effect of minocycline on the cognition and expressions of brain- derived neurotrophic factor (BDNF), apoptosis related factor Bcl-2 and Bax in hippocampus of rats with Alzheimer’ s disease (AD).Methods The rat model was established by microinjection of Aβ25-35 into lateral ventricle. Thirty healthy male SD rats were randomly divided into three groups: control group, model group and minocycline treatment group. Normal saline 1 mL/(kg· d) was intraperitoneally injected in control group and model group. The minocycline treatment group was intraperitoneally injected with minocycline 50 mg/(kg· d) for 14 days. Morris water maze was used to detect the behaviors of animals. The expressions of BDNF, Bcl-2 and Bax in hippocampus were measured by Western blotting and enzyme linked immunosorbent assay (ELISA). The apoptosis of neurons was detected by TdT- mediated dUTP nick- end labeling (TUNEL). Results Minocycline greatly improved the behaviors of AD rats, up- regulated the expressions of BDNF and Bcl- 2, and downregulated the expression of Bax in hippocampus, and reduced cell apoptosis. Conclusion Minocycline plays a protective role in neural function by promoting the growth of neurons and inhibiting the neuronal apoptosis.

Key words: Tetracyclines, Alzheimer disease, apoptosis, nerve tissue proteins, cognition, Minocycline, brain-derived neurotrophic factor