betway必威登陆网址 (betway.com )学报››2021,Vol. 42››Issue (9): 645-650.DOI:10.3969/j.issn.2097-0005.2021.09.002
董其威, 赵华阳, 任世浩, 张朋杰, 侯亚军, 毛蕾蕾()
收稿日期:
2021-03-03出版日期:
2021-09-25发布日期:
2021-10-13通讯作者:
毛蕾蕾作者简介:
董其威,临床医学本科学生。基金资助:
Qiwei Dong, Huayang Zhao, Shihao Ren, Pengjie Zhang, Yajun Hou, Leilei Mao()
Received:
2021-03-03Online:
2021-09-25Published:
2021-10-13Contact:
Leilei Mao摘要:
探讨新型核因子2相关因子 (NFE2 related factor 2, Nrf2)的激活剂CDDO-EA对小鼠蛛网膜下腔出血(subarachnoid hemorrhage,SAH)后神经功能缺损及小胶质细胞极化的影响。
应用大脑中动脉穿刺法制作SAH模型,术后72 h进行神经功能评分,随后处死小鼠并留取脑组织进行冰冻切片,采用免疫荧光双标染色CD206/Iba1标记M2型小胶质细胞。
术后48 h收集各组动物大脑皮层做Western blot检测CDDO-EA表达量,结果表明,50 μg及100 μg CDDO-EA处理组脑内Nrf2表达量较PBS对照组均明显增加(P< 0.05)。我们采用50 μg最佳剂量治疗SAH小鼠,术后72 h对各组动物进行神经功能评分,结果表明SAH模型小鼠具有明显的神经功能障碍,而给予CDDO-EA治疗后神经功能有所改善(P< 0.05)。另外,CDDO-EA治疗后大脑皮层及海马M2型小胶质细胞比Vehicle对照组明显增多。
CDDO-EA治疗蛛网膜下腔出血能够有效改善神经功能,很有可能是通过上调Nrf2表达促进小胶质细胞向M2型转化实现的。
中图分类号:
董其威, 赵华阳, 任世浩, 张朋杰, 侯亚军, 毛蕾蕾. Nrf2激活剂CDDO-EA抑制蛛网膜下腔出血后神经功能损伤及促进小胶质细胞M2型转化[J]. betway必威登陆网址 (betway.com )学报, 2021, 42(9): 645-650.
Qiwei Dong, Huayang Zhao, Shihao Ren, Pengjie Zhang, Yajun Hou, Leilei Mao. Attenuation of neurological deficit after SAH and the promotion of microglia polarization toward M2 phenotype in mice by the novel Nrf2 activator CDDO-EA[J]. Journal of Shandong First Medical Unversity & Shandong Academy of Medical Sciences, 2021, 42(9): 645-650.
项目 | 表现及评分 |
---|---|
自主运动 | 正常:3分;轻度影响:2分;重度影响:1分;无活动:0分 |
提住鼠尾悬空时四肢活动对称性 | 对称:3分;不对称2分;偏瘫:1分 |
提住鼠尾放置桌面边缘观察前爪伸展 | 对称:3分;轻度不对称:2分;显著不对称:1分;偏瘫:0分 |
攀爬和抓持铁笼的能力 | 攀爬容易且有力:3分;一侧损害表现:2分;不能攀爬或转圈:1分 |
身体感觉反应 | 双侧对称:3分;测反应迟钝:2分;一侧无反应:1分; |
触碰胡须 | 对称:3分;不对称:2分;一侧无反应:1分 |
表1神经功能评分系统
项目 | 表现及评分 |
---|---|
自主运动 | 正常:3分;轻度影响:2分;重度影响:1分;无活动:0分 |
提住鼠尾悬空时四肢活动对称性 | 对称:3分;不对称2分;偏瘫:1分 |
提住鼠尾放置桌面边缘观察前爪伸展 | 对称:3分;轻度不对称:2分;显著不对称:1分;偏瘫:0分 |
攀爬和抓持铁笼的能力 | 攀爬容易且有力:3分;一侧损害表现:2分;不能攀爬或转圈:1分 |
身体感觉反应 | 双侧对称:3分;测反应迟钝:2分;一侧无反应:1分; |
触碰胡须 | 对称:3分;不对称:2分;一侧无反应:1分 |
组别 | 只数 | Nrf2 |
---|---|---|
假手术组(Sham) PBS CDDO-EA(10 μg) CDDO-EA(50 μg) CDDO-EA(100 μg) |
3 3 3 3 3 |
100 ± 9.71 92.77 ± 1189 118.12 ± 4.66 130.25 ± 11.21a 155.8 ± 5.13b |
F | 15.44 | |
P | 0.0003 |
表2各组动物大脑皮层Nrf2蛋白水平的表达(xˉ ± s)
组别 | 只数 | Nrf2 |
---|---|---|
假手术组(Sham) PBS CDDO-EA(10 μg) CDDO-EA(50 μg) CDDO-EA(100 μg) |
3 3 3 3 3 |
100 ± 9.71 92.77 ± 1189 118.12 ± 4.66 130.25 ± 11.21a 155.8 ± 5.13b |
F | 15.44 | |
P | 0.0003 |
组别 | 只数 | 基底皮层区(%) | 海马CA1区(%) |
---|---|---|---|
假手术组(Sham) | 3 | 8.57 ± 1.43 | 2.86 ± 0.08 |
SAH + PBS (Vehicle) | 4 | 27.18 ± 4.30b | 19.85 ± 5.95a |
SAH + CDDO-EA(EA) | 4 | 82.11 ± 5.80 | 60.69 ± 8.65c |
F | 299.8 | 74.35 | |
P | < 0.0001 | < 0.0001 |
表3SAH后各组动物大脑CD206+M2小胶质细胞数(xˉ ± s)
组别 | 只数 | 基底皮层区(%) | 海马CA1区(%) |
---|---|---|---|
假手术组(Sham) | 3 | 8.57 ± 1.43 | 2.86 ± 0.08 |
SAH + PBS (Vehicle) | 4 | 27.18 ± 4.30b | 19.85 ± 5.95a |
SAH + CDDO-EA(EA) | 4 | 82.11 ± 5.80 | 60.69 ± 8.65c |
F | 299.8 | 74.35 | |
P | < 0.0001 | < 0.0001 |
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