文章摘要

多耐药基因 1 及多药耐药相关蛋白 1 在雷帕霉素靶蛋白相关性难治性癫痫病变中的表达与细胞分布

作者: 1冷慧, 1梁乐, 1付静, 2李云林, 1刘永玲
1 北京市海淀医院,北京大学第三医院海淀院区病理科,北京 100080
2 首都儿科研究所神经外科,北京 100020
通讯: 冷慧 Email: liulengtong@126.com
DOI: 10.3978/j.issn.2095-6959.2018.06.010
基金: 北京市海淀医院( 北京大学第三医院海淀院区) 青年科研项目(KYQ2017004);首都儿科研究所科研基金(FX-2017-04)

摘要

目的:探讨多耐药基因1(mult idr ug resi stance gene 1,MDR1)及多药耐药相关蛋白1(mult idr ug resistance associated protein 1,MRP1)在雷帕霉素靶蛋白相关性难治性癫痫病变中的表达与细胞分布特征及在耐药过程中发挥的作用。方法:选取39例雷帕霉素靶蛋白相关性难治性癫痫病变病例,包括9例局灶性脑皮质发育不良(focal cor tical dysplasia,FCD)IIB型,15例结节性硬化症(tuberous sclerosis complex,TSC)及15例节细胞胶质瘤(ganglioglioma,GG),按病变类型分组,将10例正常脑组织作为对照组,选用MDR1及MRP1两种免疫组织化学试剂,采用MaxVision法染色,观察在各组2种蛋白的表达与细胞分布特点。结果:MDR1及MRP1两种耐药蛋白在各疾病组相对于对照组均表达上调,并显示不同的细胞分布。MDR1主要表达于病灶区域内血管内皮细胞;MRP1主要表达于病灶区域内异常神经元,气球样细胞及巨细胞表达强弱不一。此外,2种蛋白在胶质细胞中均有中等或以上程度的表达,且MRP1更显著表达于血管周胶质细胞,表达强度及范围与病变中增生胶质细胞的数量相关。结论:MDR1及MRP1在雷帕霉素靶蛋白相关性难治性癫痫病变(FCD IIB,TSC及GG)中协同表达,可能在耐药机制中发挥作用,形态异常的神经元、过度增生的胶质细胞以及被破坏的血管内皮与癫痫耐药密切相关。
关键词: 多耐药基因1;多药耐药相关蛋白1;雷帕霉素靶蛋白;耐药;癫痫

Expression and cell distribution of multidrug resistance gene 1 and multidrug resistance associated protein 1 in intractable epilepsy associated with rapamycin target protein lesion

Authors: 1LENG Hui, 1LIANG Le, 1FU Jing, 2LI Yunlin, 1LIU Yongling
1 Department of Pathology, Beijing Haidian Hospital, Beijing Haidian Section of Peking University Third Hospital, Beijing 100080
2 Department of Neurosurgery, Capital Institute of Pediatrics, Beijing 100020, China

CorrespondingAuthor: LENG Hui Email: liulengtong@126.com

DOI: 10.3978/j.issn.2095-6959.2018.06.010

Foundation: This work was supported by the Youth Research Project of Beijing Haidian Hospital (Beijing Haidian Section of Peking University Third Hospital) (KYQ2017004) and Research Fund of the Capital Institute of Pediatrics (FX-2017-04), China

Abstract

Objective: To investigate the expression of multidrug resistance gene 1 (MDR1) and multidrug resistance associated protein 1 (MRP1) in the refractory epilepsy related to rapamycin-related target protein and the role of two proteins in the process of drug resistance. Methods: Thirty-nine cases of intractable epilepsy with rapamycin target protein were selected, including 9 cases of focal cerebral cortex dysplasia (FCD) type IIB, 15 cases of tuberous sclerosis complex (TSC) and 15 cases of ganglioglioma (GG). We grouped via the lesions type. Ten cases of normal brain tissue were used as the control group. We choose MDR1 and MRP1, which are 2 kinds of immunohistochemical antibodies. We use the MaxVision method to stain, to observe the expression of these 2 antibodies in different groups. Results: The two resistant proteins of MDR1 and MRP1 were all upregulated in the disease group compared with the control group, but the distribution of the cells was different. MDR1 is mainly expressed in the vascular endothelial cells in the focus area. MRP1 is mainly expressed in abnormal neurons in the lesion area, and the expression of balloon like cells and giant cells is different. In addition, 2 kinds of proteins were moderately or more expressed in glial cells, and MRP1 was more clearly expressed in glial cells around vessels. The intensity and extent of expression correlated with the number of glial cells in the lesions. Conclusion: MDR1 and MRP1 are coexpressed in rapamycin related intractable epilepsy (FCD IIB, TSC and GG), and may have roles in the mechanism of drug resistance. Abnormal morphologic neurons, hyperplastic glial cells and damaged vascular endothelium are closely related to the drug resistance of epilepsy.
Keywords: multidrug resistance related 1; multidrug resistance related protein 1; rapamycin target protein; drug resistance; epilepsy

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