噻萘普汀与碳酸锂对慢性应激抑郁模型大鼠海马pCREB表达的影响

目的 研究噻萘普汀与碳酸锂对慢性应激抑郁模型大鼠海马磷酸化Camp反应元件结合蛋白(Pcreb)表达的影响.方法 将大鼠随机排列法分为抑郁模型组、噻萘普汀组、碳酸锂组和对照组.模型组、噻萘普汀组和碳酸锂组给予21 d的应激刺激,此期间对照组正常饲养,刺激期间噻萘普汀组每天灌胃噻萘普汀(50mg/kg),碳酸锂组每天灌胄碳酸锂(60mg/kg),模型组和对照组每天灌胃等体积的生理盐水.行为学检测应用open-field法和液体消耗实验.采用Western-blotting法检测各组大鼠海马Pcreb的表达情况.结果 应激后模型组水平穿越格数[(23.2±23.0)格]、竖立次数[(8.1±7.2)次]、修饰次数[(3.6±3.5)次]、糖水消耗百分比[(55.4±11.7)%]均显著低于对照组[分别为(46.0±18.9)格、(20.3±11.3)次、(8.4±2.7)次、(68.5±8.2)%;均P＜0.01].应激后噻萘普汀组水平穿越格数[(28.1±23.0)格]、竖立次数[(12.1±9.4)次]和修饰次数[(5.5±3.2)次]低于对照组(P＜0.05),与模型组差异无显著性;糖水消耗百分比[(62.7±10.6)%]与对照组差异无显著性,但高于模型组(P＜0.05).应激后碳酸锂组水平穿越格数和糖水消耗百分比低于对照组(P＜0.05),竖立次数和修饰次数低于对照组(P＜0.01),各项数值均高于模型组,但差异无显著性(P＜0.05).在Western-blotting法检测中,模型组大鼠海马Pcreb的表达水平显著低于对照组(P＜0.01);噻萘普汀组大鼠海马Pcreb的表达水平与对照组差异无显著性(P＞0.05),但显著高于模型组(P＜0.01);碳酸锂组大鼠海马Pcreb的表达水平显著低于对照组(P＜0.01).高于模型组(P＜0.01).结论 噻萘普汀可以逆转慢性应激抑郁模型大鼠海马中Pcreb表达的降低;碳酸锂可以部分逆转慢性应激抑郁模型大鼠海马中Pcreb表达的降低.

Abstract：

Objective To research the effects of tianeptine and lithium on expression of pCREB in hippocampus of chronic stress depression rats. Methods All the experimental rats were divided by random into : Group of depression,Group of tianeptine,Group of lithium and Group of control. The rats of Group of depression, Group of tianeptine and Group of lithium were applied stress for 21 days,and meanwhile Group of control had no stress. The rats of Group of tianeptine were fed with tianeptine (50 mg/kg) , Group of lithium were fed with lithium (60 mg/kg) , while another groups were fed with normal sodium of the same volume. The ethology examination was performed by using method of open-field and experiment of fluid consumption. The expression of pCREB was detected by Western-blotting method. Results After the chronic stress,the horizontal crossing numbers,the erection times,the modification times and the percentage of sacchar-consumption of the rats of Group of depression were 23.2±23.0;8. 1 ±7.2; 3.6 ±3.5 and (55.4 ±11.7)% respectively, which were less than Group of control (46.0±18.9;20.3±11.3;8.4±2.7 and (68.5 ±8.2)% ; P＜0.01). The horizontal crossing numbers(28. 1 ±23.0) ,the erection times(12. 1 ± 9.4) and the modification times(5.5 ±3.2) of Group of tianeptine are less than those of Group of control (P ＜ 0. 05), but no significant difference compared with Group of depression; the percentage of sacchar-consumption(62.7 ± 10.6) % ,Group of tianeptine was more than Group of depression (P＜ 0.05 ) , but no obvious difference with Group of control. The horizontal crossing numbers, the erection times, the modification times and the percentage of sacchar-consumption of Group of lithium were less than those of Group of control (P ＜ 0.05), more than those of Group of depression but no significant difference (P ＞ 0.05). In Westernblotting method,the level of pCREB in the hippocampus of Group of depression was less than that of Group of control (P＜ 0.01); that of Group of tianeptine was more than that of Group of depression (P ＜ 0.01) but no obvious difference with Group of control; that of Group of lithium was less than that of Group of control (P＜0. 01) and more than Group of depression (P＜0.01). Conclusion Tianeptine could reverse the reduction of expression of pCREB in hippocampus of chronic stress depression rats and lithium partly did it.

Effects of tianeptine and lithium on expression of pCREB in hippocampus of chronic stress depression rats

Objective To research the effects of tianeptine and lithium on expression of pCREB in hippocampus of chronic stress depression rats. Methods All the experimental rats were divided by random into : Group of depression,Group of tianeptine,Group of lithium and Group of control. The rats of Group of depression, Group of tianeptine and Group of lithium were applied stress for 21 days,and meanwhile Group of control had no stress. The rats of Group of tianeptine were fed with tianeptine (50 mg/kg) , Group of lithium were fed with lithium (60 mg/kg) , while another groups were fed with normal sodium of the same volume. The ethology examination was performed by using method of open-field and experiment of fluid consumption. The expression of pCREB was detected by Western-blotting method. Results After the chronic stress,the horizontal crossing numbers,the erection times,the modification times and the percentage of sacchar-consumption of the rats of Group of depression were 23.2±23.0;8. 1 ±7.2; 3.6 ±3.5 and (55.4 ±11.7)% respectively, which were less than Group of control (46.0±18.9;20.3±11.3;8.4±2.7 and (68.5 ±8.2)% ; P＜0.01). The horizontal crossing numbers(28. 1 ±23.0) ,the erection times(12. 1 ± 9.4) and the modification times(5.5 ±3.2) of Group of tianeptine are less than those of Group of control (P ＜ 0. 05), but no significant difference compared with Group of depression; the percentage of sacchar-consumption(62.7 ± 10.6) % ,Group of tianeptine was more than Group of depression (P＜ 0.05 ) , but no obvious difference with Group of control. The horizontal crossing numbers, the erection times, the modification times and the percentage of sacchar-consumption of Group of lithium were less than those of Group of control (P ＜ 0.05), more than those of Group of depression but no significant difference (P ＞ 0.05). In Westernblotting method,the level of pCREB in the hippocampus of Group of depression was less than that of Group of control (P＜ 0.01); that of Group of tianeptine was more than that of Group of depression (P ＜ 0.01) but no obvious difference with Group of control; that of Group of lithium was less than that of Group of control (P＜0. 01) and more than Group of depression (P＜0.01). Conclusion Tianeptine could reverse the reduction of expression of pCREB in hippocampus of chronic stress depression rats and lithium partly did it.