ABSTRACT
Objective To investigate the expression changes of the protein tyrosine phosphatase receptor T (PTPRT) in temporal lobe epileptic foci in the experimental animals and epileptic patients and the relationship between PTPRT and epileptogenesis.Methods After getting the epilepsy lobe tissue from the experimental and control groups,immunohistochemistry,immunofluorescence and Western blot analysis were used to assess the expression of PTPRT and its changes.Results In the temporal lobe tissue of intractable patients and control group,PTPRT was mainly expressed in the neurons.PTPRT was significantly increased in patients with intractable epilepsy (0.277 ± 0.048) than that in the control group(0.171 ±0.025 ; t =9.586,P ＜ 0.05).PTPRT was mainly expressed in the neurons in the temporal lobe brain tissue of the rats in the control group and experimental group.Compared with control group,the expression of PTPRT in the temporal lobe tissue was increased within 24 h post-seizure,and decreased 1 and 2 weeks post-seizure,then it was increased 1 and 2 months post-seizure (A ratio:control 0.443 ± 0.039,6 h 0.840±0.032,24 h 1.113 ±0.064,7 d 0.564 ±0.039,14 d 0.570 ±0.029,30 d 0.899 ±0.034,60 d 1.011 ± 0.074,F =256.427,P ＜ 0.05).Conclusions Through researches into the expression and function of PTPRT in the temporal lobe brain tissue of patients with intractable epilepsy and animal models,we presume that the PTPRT plays a role in the synapses reorganization and mossy fiber sprouting,and participates in the reconstruction of the neural network which leads to the intractable epilepsy.
ABSTRACT
Objective In order to make a epileptic model in organotypic slice culture and to further investigate the epileptic pathology. Methods Immunohistochemistry, Fluoro-Jade B staining and BrdU labeling were carried out in the hippocampal slices with domoic acid treatment after 7 days of culture.Results Domoic acid could induce a series of pathological changes, such as, dispersion of granule cells(0.105±0.063) mm vs (0.057±0.012) mm, t = 4.8, P<0.01), neurogenesis in granular layer and cell loss of pyramidal cell and Mossy cell as well. Conclusions In hippocampal organotypic slices, domoic acid induced such pathological changes as human temporal lobe epilepsy and epileptic animal model. It is an ideal epileptic model for pathological, pharmacological and electronic physiological studies with great applicable prospect.
ABSTRACT
Objective To study the expression of heat shock 27 000 associated protein 1 ( HSPBAP1, GenBank: AK096705) in the brain tissues of patients with drug-refractory epilepsy and discuss its function in the pathogenesis. Methods Fluorescent quantitative polymerase chain reaction ( FQ-PCR) and immunohistochemistry were used to test the expression of HSPBAP1 in the surgically removed brain tissues of patients with drug-refractory epilepsy from the brain bank of our department ( n = 36) , and the results were compared with that of normal controls (n = 8 ). Results The relative expression of HSPBAP1 mRNA in the brains of patients with drug-refractory epilepsy was more than 34. 11 times that of controls, and HSPBAP1 protein expression was significantly increased in temporal lobe cortex (0. 0507?0. 0003, P
ABSTRACT
Objective To explore the changes of Sema3A and it′s receptor Npl in temporal lobe epilepsy(TLE)rat brain and the roles in epileptogenesis mechanism.Methods TLE model was established with male healthy SD rats,in which mossy fiber sprouting(MFS)was verified using Neo-Timm staining method.Sema3A mRNA,Npl mRNA and protein was respectively analyzed by immunohistochemistry and in situ hybridization in the entorhinal cortex(EC)or dentate gyrus(DG)at different time after LiCL-PILO induced TLE.Results There were Mossy fiber sprouting(7d:0.70?0.42,15d:1.50?0.52,30 d:2.20 ?0.41,60 d:2.50?0.51)in DG inner molecular layer(IML)of TLE rat compared with those of controls (P