PJ34对脑缺血再灌注大鼠应用rt-PA后血脑屏障完整性的影响

张玉鹏, 李芳, 陈竹, 毛鹤, 王东玉

doi:10.13418/j.issn.1001-165x.2019.03.010

中国临床解剖学杂志 >

2019 , Vol. 37 >Issue 3: 287 - 291

DOI: https://doi.org/10.13418/j.issn.1001-165x.2019.03.010

实验研究

PJ34对脑缺血再灌注大鼠应用rt-PA后血脑屏障完整性的影响

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1.锦州医科大学研究生学院；　2.锦州医科大学附属第一医院神经内科；
3.锦州市中心医院神经内科，辽宁锦州 121000

张玉鹏（1991-），男，硕士研究生，现工作单位：锦州市康宁医院，Tel：18904963616，E-mail：150146976@qq.com

收稿日期: 2018-11-06

网络出版日期: 2019-06-13

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Effect of PJ34 on blood-brain barrier integrity after injecting of rt-PA in rats with cerebral ischemia-reperfusion

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1. Jinzhou Medical University Graduate School; 2. Department of Neurology, the First Affiliated Hospital of Jinzhou Medical University; 3.Department of Neurology, Jinzhou Central Hospital, Jinzhou 121000, Liaoning Province, China

Received date: 2018-11-06

Online published: 2019-06-13

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摘要

目的　研究多聚ADP核糖聚合酶-1（poly-ADP ribose polymerase-1，PARP-1）抑制剂PJ34能否改善脑缺血再灌注大鼠应用重组人组织型纤溶酶原激活物（recombinant tissue plasminogen activator，rt-PA）后的血脑屏障完整性。方法　将60只大鼠随机分为假手术组、缺血再灌注（ischemia-reperfusion，IR）组、rt-PA组及PJ34组。IR组：采用改良 Zea Longa 线栓法，制备局灶性脑缺血2 h再灌注模型。PJ34组及rt-PA组：缺血2 h拔出鱼线，同时给予尾静脉注射rt-PA 10 mg/kg，腹腔注射PJ34或生理盐水3 mg/kg。进行神经功能缺损评分、伊文氏蓝测定血脑屏障通透性、免疫组化分析MMP-9、Claudin-5、ZO-1的表达。结果　rt-PA组的神经功能缺损评分、伊文氏蓝含量及MMP-9表达均高于IR组，PJ34组低于rt-PA组，但高于IR组（P<0.05）；rt-PA组的Claudin-5、ZO-1表达低于IR组，PJ34组高于rt-PA组，但低于IR组（P<0.05）。结论　PJ34通过抑制MMP-9的表达，增加Claudin-5、ZO-1的表达，可以有效改善脑缺血再灌注后应用rt-PA的大鼠血脑屏障完整性。

关键词： PJ34; 　血脑屏障; 　缺血再灌注; 　重组人组织型纤溶酶原激活物

本文引用格式

张玉鹏, 李芳, 陈竹, 毛鹤, 王东玉 . PJ34对脑缺血再灌注大鼠应用rt-PA后血脑屏障完整性的影响[J]. 中国临床解剖学杂志, 2019 , 37(3) : 287 -291 . DOI: 10.13418/j.issn.1001-165x.2019.03.010

Abstract

Objective　To investigate whether the poly-ADP ribose polymerase-1 (PARP-1) inhibitor PJ34, N- (6-oxo-5,6-dihydrophenanthridin-2-yl)-2-dimethylamino can improve the integrity of the blood-brain barrier after rt-PA administration in rats with cerebral ischemia reperfusion.　Methods　Totally 60 rats were randomly divided into a sham operation group, an IR group, a rt-PA group and a PJ34 group. IR group: focal cerebral ischemia 2 h reperfusion model was made by modifying Zea Longa method. PJ34 group and rt-PA group: the fish line was removed 2 h after ischemia, rt-PA (10 mg/kg) was administered to the tail vein, and PJ34 or physiological saline (3 mg/kg) was intraperitoneally injected. The neurological function score was evaluated, the permeability of the blood-brain barrier was measured by Evans blue staining, and the expressions of MMP-9, Claudin-5 and ZO-1 was analyzed by immunohistochemistry.　Results　The mNSS score, Evans blue content and MMP-9 expression in rt-PA group were significantly higher than those in the IR group, and those in PJ34 group were lower than those in rt-PA group, but were higher than those in IR group (P＜0.05). The expression of Claudin-5 and ZO-1 in rt-PA group was lower than that in IR group, higher in PJ34 group than in rt-PA group, but lower than that in IR group (P<0.05). Conclusions PJ34 can effectively improve the integrity of blood-brain barrier of rt-PA rats after cerebral ischemia by inhibiting the expression of MMP-9 and increasing the expressions of Claudin-5 and ZO-1.

Key words： ; PJ34; 　Blood-brain barrier; 　Ischemia reperfusion; 　rt-PA

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