柴胡加龙骨牡蛎汤加减通过p38 MAPK通路改善CKD小鼠PFC突触可塑性及抑郁行为研究

被引:24
作者
李凡 [1 ]
肖波飞 [2 ]
宋敏 [3 ]
熊维建 [1 ]
雷蕾 [1 ]
王开振 [1 ]
龙梅 [1 ]
丁伟森 [1 ]
机构
[1] 重庆市中医院肾内科
[2] 湖南省中医药研究院附属医院
[3] 重庆医科大学第二附属医院
关键词
慢性肾脏病; 抑郁; 炎症; 突触可塑性; 柴胡加龙骨牡蛎汤加减; p38 MAPK;
D O I
10.14148/j.issn.1672-0482.2021.0878
中图分类号
R285.5 [中药实验药理];
学科分类号
100806 [中药药理学];
摘要
目的探讨柴胡加龙骨牡蛎汤加减(CLMD)对慢性肾脏病(CKD)小鼠抑郁行为的作用及可能机制。方法 3月龄雄性C57BL/6小鼠60只,分为对照组、模型组、氟西汀组、CLMD低剂量组、CLMD中剂量组和CLMD高剂量组。除对照组外,其余5组小鼠先予0.2%腺嘌呤饮食喂养2周。中药干预组分别予2.36、4.725、9.45 g·kg-1·d-1的CLMD灌胃,氟西汀组予10 mg·kg-1·d-1氟西汀灌胃,对照组、模型组予生理盐水灌胃,共计6周。糖水偏好测试、强迫游泳实验检测小鼠抑郁行为表型,Western blot法检测前额叶皮层(PFC) p38丝裂原活化蛋白激酶(p38 MAPK)、磷酸化p38 MAPK(p-p38 MAPK)、脑源性神经营养因子(BDNF)、环磷腺苷效应元件结合蛋白(CREB)、磷酸化CREB(p-CREB)、突触后致密蛋白95(PSD95)、突触素(SYN)、生长相关蛋白43(GAP43)和突触囊泡膜蛋白(SYP)表达;免疫荧光法检测PFC脑区核内p-CREB的表达;Golgi-Cox染色检测PFC树突棘密度;ELISA法检测外周及PFC炎性因子水平及血清肌酐、尿素氮水平。结果行为学检测结果显示:与对照组相比,模型组不动时间增加,糖水偏好指数下降(P<0.01);与模型组相比,给予中、高剂量CLMD干预后小鼠不动时间下降(P<0.01),糖水偏好指数增加(P<0.05,P<0.01),CLMD中、高剂量组与氟西汀组之间差异无统计学意义(P>0.05)。Western blot结果显示:与对照组相比,模型组小鼠PFC中p-p38 MAPK/p38 MAPK表达增加(P<0.01),BDNF、p-CREB/CREB、PSD95、SYN、GAP43、SYP表达下调(P<0.01);与模型组相比,CLMD中、高剂量组,氟西汀组小鼠p-p38 MAPK/p38 MAPK表达下调(P<0.01),BDNF、p-CREB/CREB、PSD95、SYN、GAP43、SYP表达增加(P<0.01)。免疫荧光结果显示:与对照组相比,模型组PFC的p-CREB核内荧光水平明显降低(P<0.01);与模型组相比,CLMD中、高剂量组,氟西汀组p-CREB核内荧光强度增加(P<0.05,P<0.01)。Golgi-Cox染色结果显示:与对照组相比,模型组小鼠PFC树突棘密度降低(P<0.01);与模型组相比,CLMD中、高剂量组,氟西汀组小鼠PFC树突棘密度增加(P<0.01)。ELISA法检测结果显示:与对照组相比,模型组PFC及外周血清中炎性因子水平增加(P<0.01),血清尿素氮、肌酐水平增加(P<0.01);与模型组相比,氟西汀组及CLMD中、高剂量组PFC及外周血清中炎性因子水平下降(P<0.05,P<0.01),CLMD中、高剂量组血清尿素氮、肌酐水平下降(P<0.05,P<0.01),氟西汀组尿素氮、肌酐水平无明显变化。结论 CLMD能调节中枢炎症状态,改善PFC突触可塑性,减轻CKD小鼠抑郁症状,同时可能通过影响外周炎症状态延缓CKD小鼠肾脏功能恶化。
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页码:878 / 885
页数:8
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