Cx43和Cx36在癫痫中的表达变化及作用的研究
[Abstract]:Objective: epilepsy is a nervous system disease caused by abnormal discharge of neural network, which brings a great burden to individuals, families and society. Gap junction is a channel of communication between cells, carrying a lot of information exchange. Studies show that gap junction plays an important role in the occurrence and development of epilepsy. Cx43,Cx36 is a member of gap junction family. It plays an irreplaceable role in the course of epileptic seizure. In this study, we established a rat model of acute epilepsy induced by pentylenetetrazol, observed and recorded its behavioral changes, and detected Cx43, in hippocampus and cortex of rats in each group. The change of Cx36 expression and its relationship with Caspase-3,Bax,Bcl-2. The relationship between gap junction protein and apoptosis was analyzed, and the relationship between gap junction protein and epilepsy was discussed in order to find the possible target to guide clinical drug therapy for epilepsy. Methods: the acute epileptic model of pentylenetetrazole (PTZ) rats was established. The experimental group was injected intraperitoneally with normal saline by intraperitoneal injection of PTZ,. After the success of the model, the rats were randomly divided into two groups: 2 h, 6 h, 12 h and 1 d. The dynamic expression of Cx43 and Cx36 in hippocampus and cortex was observed by HE staining, immunohistochemistry and Western Blot,RT-PCR, and Caspase-3,Bax, was observed. The changes of Bcl-2 were used to investigate the possible mechanism of gap junction protein (CGN) in the apoptosis of epileptic neurons. Results: 1. Immunohistochemical staining showed that a large number of Cx36 positive cells were found in the cortex and hippocampus (CA1 and CA3) of rats. Compared with the control group, the expression of Cx36 protein increased at 2h and reached a higher level at 12h. The protein of Cx43 increased significantly at 2 h, but did not change after 2 h, which was significantly different from that of the control group. 2.Western Blot results showed that the changes of Cx43 and Cx36 were consistent with those of immunohistochemistry. The results showed that Caspase-3 increased continuously at 2 h after epilepsy, and 12h-1d reached the peak at about 2 h after epilepsy. The ratio of Bax/Bcl-2 to Bax/Bcl-2 increased significantly at 2 h after epilepsy. The results of 3.PCR showed that the ratios of Cx43,Cx36,Caspase-3 and Bax/Bcl-2 in each group were significantly increased after 2 h. 4.SH-SY5Y cells were induced by RA and treated with magnesium free solution for 3 h. There was no significant difference between Cx43 and Cx36 mRNA. Conclusion: the changes of 1.Cx43 and Cx36 in hippocampal CA1 and CA3 are the most obvious. Cx43 and Cx36 may be involved in the process of hippocampal injury induced by PTZ, and the neurons in cortex and hippocampus of 2.PTZ acute epilepsy rats may induce apoptosis through mitochondrial pathway.
【学位授予单位】:吉林大学
【学位级别】:硕士
【学位授予年份】:2016
【分类号】:R742.1
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