大黄酚对局灶性脑缺血再灌注小鼠缺血半暗带区环氧化酶2和基质金属蛋白酶-9表达的影响

doi:10.3969/j.issn.1006-7795.2017.01.010

首都医科大学学报 ›› 2017, Vol. 38 ›› Issue (1): 47-52.doi: 10.3969/j.issn.1006-7795.2017.01.010

• 脑血管病、认知障碍的基础及临床研究 • 上一篇下一篇

大黄酚对局灶性脑缺血再灌注小鼠缺血半暗带区环氧化酶2和基质金属蛋白酶-9表达的影响

房亚兰, 黄语悠, 赵咏梅, 李锦程, 段云霞, 赵海苹, 高利, 罗玉敏

首都医科大学宣武医院北京市老年病医疗研究中心神经变性病教育部重点实验室脑血管病转化医学北京市重点实验室, 北京 100053

收稿日期:2016-11-28 出版日期:2017-01-21 发布日期:2017-01-20
通讯作者: 赵咏梅 E-mail:yongmeizhao@hotmail.com
基金资助:
国家临床重点专科（中医，财社122号），北京市自然科学基金（7122036）。

Effects of chrysophanol on the expressions of cyclooxygenase-2 and matrix metalloproteinase-9 in the penumbra of mice following focal cerebral ischemia/reperfusion

Fang Yalan, Huang Yuyou, Zhao Yongmei, Li Jincheng, Duan Yunxia, Zhao Haiping, Gao Li, Luo Yumin

Xuanwu Hospital, Capital Medical University, Beijing Geriatric Medical Research Center, Key Laboratory of Neurodegenerative Diseases of Ministry of Education, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing 100053, China

Received:2016-11-28 Online:2017-01-21 Published:2017-01-20
Supported by:
This study was supported by National Key Clinical Specialty (Traditional Chinese Medicine, No.122),Natural Science Foundation of Beijing (7122036).

摘要/Abstract

摘要： 目的探究大黄酚（Chrysophanol，CHR）对大脑中动脉梗死（middle cerebral artery occlusion，MCAO）模型小鼠再灌注后脑内环氧化酶2（cyclooxygenase-2，COX2）和基质金属蛋白酶-9（matrix metalloproteinase-9，MMP-9）表达的影响，探讨CHR保护脑缺血再灌注损伤的抗炎机制。方法采用数字表法随机将18只健康雄性C57BL小鼠分为3组：假手术（Sham）组、MCAO组、CHR组（小鼠造模当天按0.1 mg/kg腹腔注射CHR，此后每天1次，连续给药14 d），每组6只。使用线栓法制作小鼠右侧大脑中动脉缺血45 min再灌注模型。术中监测小鼠肛温，使其维持在正常范围。于再灌注后14 d处死小鼠，迅速取脑，用免疫荧光染色检测小鼠脑组织冰冻切片缺血半暗带区COX2和MMP-9的表达，并用免疫荧光双标法对COX2和MMP-9在缺血脑组织的表达进行细胞定位。结果 1）Sham组小鼠偶见COX2或MMP-9染色阳性细胞。与Sham组相比，MCAO组小鼠脑缺血半暗带区COX2和MMP-9的表达明显增高（P<0.05）。2）与MCAO组相比，给予CHR治疗后，缺血再灌注小鼠脑缺血半暗带区COX2和MMP-9的表达均明显减少（P<0.05）。3）缺血再灌注小鼠脑缺血半暗带区，COX2或MMP-9免疫荧光染色分别与神经元标志物NeuN免疫荧光染色共定位。结论 CHR可能通过抑制COX2和MMP-9的蛋白表达，减轻炎性反应，从而对脑缺血再灌注损伤发挥长期的神经保护作用。

关键词: 脑缺血, 大黄酚, 炎性反应, 大脑中动脉梗死, 环氧化酶2, 基质金属蛋白酶-9

Abstract: Objective To explore the effects of Chrysophanol (CHR) on the expression levels of cyclooxygenase-2 (COX2) and matrix metalloproteinase-9 (MMP-9) in mice with middle cerebral artery occlusion (MCAO)/reperfusion injury and to investigate the potential anti-inflammatory mechanism of CHR. Methods Eighteen male C57BL mice were divided into 3 groups randomly:Sham group (n=6), MCAO group (n=6), and CHR group[mice received 0.1 mg/kg CHR (i.p.) for 14 days after ischemia/reperfusion]. MCAO was induced by using the suture method. The mice underwent 45 min of right MCAO, and then reperfusion by withdrawing filament. Rectal temperature was monitored and kept in normal range during the operation. The mice were sacrificed and the brains were harvested on 14 d after reperfusion. The expressions of COX2 and MMP-9 were detected by immunofluorescent staining. And the cellular location of COX2 and MMP-9 were detected by double immunofluorescence labeled antibody technique. Results 1) In Sham group, little COX2 positive cells and MMP-9 positive cells were observed. Compared with Sham group, the number of COX2 positive cells and MMP-9 positive cells increased significantly in the penumbra of MCAO group (P<0.05). 2) Compared with MCAO group, the number of COX2 positive cells and MMP-9 positive cells decreased significantly in the penumbra of MCAO+CHR group on day 14 after reperfusion (P<0.05). 3) COX2-positive immunoreactive cells were colocalized with the general neuronal marker, NeuN, in the penumbra of ischemia/reperfusion mice. And MMP-9-positive immunoreactive cells were colocalized with NeuN. Conclusion CHR has long-term neuroprotective effect against ischemia/reperfusion injury which might be attributed to its anti-inflammatory actions by decreasing the expression of COX2 and MMP-9.

Key words: cerebral ischemia, Chrysophanol, inflammatory middle cerebral artery occlusion, cyclooxygenase-2, matrix metalloproteinase-9

中图分类号:

R743.3

房亚兰, 黄语悠, 赵咏梅, 李锦程, 段云霞, 赵海苹, 高利, 罗玉敏. 大黄酚对局灶性脑缺血再灌注小鼠缺血半暗带区环氧化酶2和基质金属蛋白酶-9表达的影响[J]. 首都医科大学学报, 2017, 38(1): 47-52.

Fang Yalan, Huang Yuyou, Zhao Yongmei, Li Jincheng, Duan Yunxia, Zhao Haiping, Gao Li, Luo Yumin. Effects of chrysophanol on the expressions of cyclooxygenase-2 and matrix metalloproteinase-9 in the penumbra of mice following focal cerebral ischemia/reperfusion[J]. Journal of Capital Medical University, 2017, 38(1): 47-52.

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大黄酚对局灶性脑缺血再灌注小鼠缺血半暗带区环氧化酶2和基质金属蛋白酶-9表达的影响

Effects of chrysophanol on the expressions of cyclooxygenase-2 and matrix metalloproteinase-9 in the penumbra of mice following focal cerebral ischemia/reperfusion

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