目的 探讨辅酶Q10对慢性应激束缚模型(CRS)抑郁小鼠的神经保护作用及其机制.方法 采用慢性应激束缚模型制备抑郁小鼠.将小鼠分为空白组(CON)、CRS组、单用辅酶Q10高剂量组(Q10-H,200 mg/kg)、模型组+辅酶Q10低剂量组(CRS+Q10-L,50 mg/kg)、模型组+辅酶Q10中剂量组(CRS+Q10-M,100 mg/kg)、模型组+辅酶Q10高剂量组(CRS+Q10-H,200 mg/kg)、模型组+caspase-1特异性抑制剂VX765组(CRS+VX765,50 mg/kg)、模型组+氟西汀组(CRS+FLX,10 mg/kg)(n=8).应用糖水偏好实验、强迫游泳实验、悬尾实验分析小鼠抑郁样行为;采用免疫组化检测胶质纤维酸性蛋白(GFAP)阳性率;高尔基染色检测神经元突触棘数量;免疫印迹实验检测海马脑区GFAP及焦亡相关蛋白的变化;免疫荧光检测神经元与caspase-1 p10的共定位情况.结果 与对照组比较,CRS模型组糖水偏好率显著降低、强迫游泳、悬尾不动时间显著增加(P<0.05),辅酶Q10、VX765及FLX可改善上述情况;与对照组比较,CRS模型组海马脑区GFAP阳性率与蛋白表达量显著减少(P<0.05),神经元突触棘显著减少(P<0.001),GSDMD-N、caspase-1、IL-1β表达显著增加(P<0.05),神经元与caspase-1 p10共标显著增加(P<0.001),辅酶Q10可改善上述情况.结论 辅酶Q10通过下调焦亡信号通路缓解抑郁小鼠抑郁样行为.
Objective To explore the neuroprotective effect of coenzyme Q10 and its possible mechanism in mice with chronic restraint stress(CRS).Methods Mouse models of CRS were treated with intraperitoneal injections of coenzyme Q10 at low,moderate and high doses(50,100 and 200 mg/kg,respectively,n=8),VX765(a caspase-1 specific inhibitor,50 mg/kg,n=8),or fluoxetine(10 mg/kg,n=8)on a daily basis for 4 weeks,and the changes in depression-like behaviors of the mice were assessed by sugar water preference test,forced swimming test and tail suspension test.The expression of glial fibrillary acidic protein(GFAP)in the hippocampus of the mice was detected using immunohistochemistry,and the number of synaptic spines was determined with Golgi staining.Western blotting was performed to detect the changes in the expressions of GFAP and pyroptosis-related proteins in the hippocampus,and the colocalization of neurons and caspase-1 p10 was examined with immunofluorescence assay.Results Compared with the normal control mice,the mouse models of CRS showed significantly reduced sugar water preference and increased immobility time in forced swimming and tail suspension tests(P<0.05),and these depression-like behaviors were obviously improved by treatment with coenzyme Q10,VX765 or FLX.The mouse models showed a significantly decreased positive rate of GFAP and lowered GFAP protein expression in the hippocampus with obviously decreased synaptic spines,enhanced expressions of GSDMD-N,caspase-1 and IL-1β,and increased colocalization of neurons and caspase-1 p10(all P<0.05).All these changes were significantly ameliorated in the mouse models after treatment with Q10.Conclusion Coenzyme Q10 can alleviate depression-like behaviors in mice with CRS by down-regulating the pyroptosis signaling pathway.
孙一鸣;张荣;孟莹;朱磊;李明强;刘哲
蚌埠医科大学 第一附属医院药剂科 安徽 蚌埠 233003||蚌埠医科大学 临床药学教研室 安徽 蚌埠 233003蚌埠医科大学 药学院,安徽 蚌埠 233003
慢性应激束缚模型;抑郁症;辅酶Q10;caspase-1;焦亡
chronic restraint stress;depression;coenzyme Q10;caspase-1;pyroptosis
《南方医科大学学报》 2024 (005)
810-817 / 8
国家自然科学基金(82104152);安徽省高校自然科学研究重点项目(KJ2021A0778);蚌埠医学院大学生创新项目(S202310367122) Supported by National Natural Science Foundation of China(82104152).
10.12122/j.issn.1673-4254.2024.05.02
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