摘要:
Objective: To investigate the effects of sodium valproate (VPA) on the expression of FAK and FAK-pY397 in hippo-campus of rats with seizure induced by pentylenetetrazole (PTZ). Methods: A total of 75 rats were randomly divided into 5 groups:the normal control group, the epilepsy model group (PTZ group) and the VPA groups(150,300 and 600 mg·kg-1·d-1)with 15 ones in each group. The model rats were continuously given PTZ (32 mg·kg-1·d-1) by intraperitoneal injection for 4 weeks and paid close attention to the behavioral changes, and then VPA was administrated orally for 2 weeks. The pathological changes of hippo-campus tissue were observed by HE staining. The expressions and distributions of FAK, FAK-pY397 and integrin in serum and hippo-campus were evaluated by immunohistochemical assay and enzyme-linked immunosorbent assay (ELISA). Results: Compared with the model group, the symptoms of epilepsy in VPA groups were significantly relieved and cell apoptosis was improved. Immunohistochemis-try showed that the expression of FAK-pY397 decreased significantly in VPA groups with the increase of sodium valproate dose, and there was no significant difference in the expression of ITGα3. The VPA groups significantly reduced the expression of FAK, FAK-pY397 and ITGβ1(P<0. 05), the expression of FAK and ITGβ1 protein in peripheral serum decreased significantly (P<0. 05), but the expression of FAK-pY397 did not change significantly. Conclusion: VPA can effectively participate in or affect the process of epi-lepsy by inhibiting the expressions of FAK-pY397 and ITGβ1 in hippocampal tissue of epileptic rats.%目的:探讨抗癫痫药丙戊酸钠(VPA)对戊四氮(PTZ)致痫模型大鼠海马组织中粘着斑激酶( FAK)、FAK-pY397表达水平的影响.方法:将75只大鼠随机分为正常对照组,模型组,VPA低、中、高剂量组(150,300,600 mg·kg-1·d-1)5组,每组15只.造模大鼠连续腹腔注射戊四氮32 mg·kg-1·d-14周,密切观察大鼠行为学变化.造模成功后,VPA各组给予相应剂量VPA灌胃,连续2周.苏木精-伊红( HE)染色观察大鼠海马组织变化;免疫组化及酶联免疫吸附法( ELISA)检测大鼠外周血清及海马组织中FAK、FAK-pY397及整合素表达情况.结果:与模型组比较,VPA各组癫痫症状有明显缓解,细胞凋亡情况有所改善;免疫组化发现VPA组FAK-pY397 的表达明显下降,且随着VPA剂量的加大,FAK-pY397 的表达有下降趋势, ITGα3表达组间无显著差异;VPA低、中、高剂量组海马组织中FAK,FAK-pY397及整合素ITGβ1表达水平下降,差异具有显著性(P<0. 05);外周血清中FAK及整合素ITGβ1 蛋白表达水平显著下降(P<0. 05),但FAK-pY397 表达无明显变化.结论: VPA可能通过抑制癫痫大鼠海马组织中FAK-pY397及ITGβ1的表达,参与或影响癫痫过程.