Abnormal expression of leucine-rich repeat transmembrane neuronal protein 2 in temporal lobe tissue of rats induced by lithium-pilocarpine
10.3760/cma.j.issn.1006-7876.2012.04.009
- VernacularTitle:富含亮氨酸重复结构的神经细胞黏附分子2在氯化锂-毛果芸香碱点燃动物颞叶脑组织中的表达
- Author:
Chunlei ZHOU
;
Jing LUO
;
Qiong ZHU
;
Xiaogang ZHANG
;
Yuanyuan HUANG
;
Huan YIN
;
Shuxin TAO
;
Liang WANG
;
Xuefeng WANG
- Publication Type:Journal Article
- Keywords:
Epilepsy,temporal lobe;
Nenral cell adhesion molecules;
Pilocarpine;
Rats
- From:
Chinese Journal of Neurology
2012;45(4):249-253
- CountryChina
- Language:Chinese
-
Abstract:
Objective Leucine-rich repeat transmembrane neuronal protein 2 (LRRTM2) localizes to excitatory glutamatergic synapses,and triggers the formation of excitatory synapses.This study aims to investigate the expression of LRRTM2 protein in the temporal lobe tissue of SD rats induced by lithiumpilocarpine,and explore its roles in epilepsy.Methods Fifty-six Sprague-Dawley (SD) rats were induced by lithium-pilocarpine and randomly divided into 6h,24h,72h,7d,14d,30d and 60d subgroups.Eight SD rats were treated with normal saline instead of pilocarpine as controls. Expression of LRRTM2 protein was accessed by immunohistochemistry,immunofluorcscence and Western blot analysis. Results LRRTM2 protein mainly expressed in neurons of temporal lobe,gradually decreased in acute phase,and then up-regulated in latent and chronic periods.The immunohistochemistry A values in model rats from 6 h,24h,72h,7d,14d,30d and 60d subgroups were 0.286 ±0.012,0.227 ± 0.008,0.425 ± 0.015,0.509 ±0.019,0.579 ± 0.018,0.488 ± 0.018 and 0.566 ± 0.014,respectively,compared to 0.330 ±0.016 in control group ( t =3.965,11.987,9.131,14.121,20.452,12.929 and 22.786,all P＜0.05). Gray value ratios of LRRTM2/β-actin in different groups of model rats were 0.0354 ± 0.0043,0.0174 ± 0.0026,0.0685 ± 0.0064,0.0957 ± 0.0125,0.1044 ± 0.0103,0.0910 ± 0.0108,and 0.1012 ±0.0063,respectively,which were significant differences from control group (0.0471 ± 0.0033,t=4.354,14.191,5.989,7.541,10.565,7.730and15.316,allP＜0.05).Conclusions LRRTM2 protein gradually increases in the neurons of temporal lobe of SD rats treated by lithium-pilocarpine in silence and chronic phases,which indicates that it may play an important role in cpileptogenesis.
