柴金解郁安神片调控ACC-vHPC谷氨酸能神经环路异常改善抑郁症大鼠腹侧海马神经元突触重塑的机制研究  

Mechanism of Chaijin Jieyu Anshen Tablets in regulating abnormal ACC-vHPC glutaminergic neural circuit to alleviate synaptic remodeling of ventral hippocampal neurons in depressed rats

作　　者：刘检[1,2] 刘林 唐林[1] 赵洪庆[2,3,4] 杨蕙 李薇[1] 孟盼[2,3,4] 王宇红 LIU Jian;LIU Lin;TANG Lin;ZHAO Hong-qing;YANG Hui;LI Wei;MENG Pan;WANG Yu-hong(Center for Medical Research and Innovation,the First Hospital of Hunan University of Chinese Medicine,Changsha 410007,China;Hunan Key Laboratory of Traditional Chinese Medicine Prevention&Treatment of Depressive Diseases,Changsha 410208,China;National Key Laboratory Cultivation Base of Chinese Medicinal Powder&Innovative Medicinal Jointly Established by Province and Ministry,Changsha 410208,China;Science&Technology Innovation Center,Hunan University of Chinese Medicine,Changsha 410208,China)

机构地区：[1]湖南中医药大学第一附属医院医学创新实验中心,湖南长沙410007 [2]抑郁类疾病中医药防治湖南省重点实验室,湖南长沙410208 [3]中药粉体与创新药物省部共建国家重点实验室培育基地,湖南长沙410208 [4]湖南中医药大学科技创新中心,湖南长沙410208

出　　处：《中国中药杂志》2024年第9期2489-2500,共12页China Journal of Chinese Materia Medica

基　　金：国家自然科学基金青年基金项目(82104793,82104836);湖南省自然科学基金面上项目(2022JJ30451);湖南省卫健委科研计划项目(W20243072);湖南省中药粉体与创新药物省部共建国家重点实验培育基地开放基金项目(21PTKF1008);湖南中医药大学中医学一流学科重点项目(2022ZYX16);湖南省三尖荷尖人才“湖湘青年英才”项目(2022RC1226,2021RC3102)。

摘　　要：探讨柴金解郁安神片调控前扣带皮层(ACC)-腹侧海马(vHPC)谷氨酸能神经环路异常改善抑郁症大鼠腹侧海马神经元突触重塑的分子机制。首先运用化学遗传将谷氨酸能腺相关病毒(AAV)定位注射至大鼠ACC脑区,并通过慢性温和不可预知性应激(CUMS)联合孤笼饲养复制大鼠抑郁模型,实验设正常组、模型组、AAV空载组、AAV病毒组、AAV病毒+糖皮质激素受体(GR)阻断剂组、AAV病毒+趋化因子受体1(CX3CR1)阻断剂组、AAV病毒+柴金解郁安神片组,采用水迷宫(Morris water maze)、旷场(open-field)和强迫游泳(forced-swimming)实验联合动物行为分析系统评估大鼠抑郁样行为;苏木素-伊红(HE)染色检测大鼠ACC及vHPC脑区神经元形态结构变化;免疫荧光及核磷酸蛋白(c-Fos)检测大鼠ACC-vHPC谷氨酸能神经环路激活情况;高尔基染色和透射电镜检测大鼠vHPC神经元树突、树突棘及突触亚微结构变化;免疫荧光、Western blot分别检测大鼠vHPC谷氨酸能神经元细胞内突触重塑相关蛋白谷氨酸受体2A(GRIN2A)、谷氨酸受体2B(GRIN2B)、Ca^(2+)/钙调蛋白依赖性蛋白激酶Ⅱ(CaMKⅡ)、丝裂原激活蛋白激酶激活蛋白激酶2(MK2)、丝切蛋白(cofilin)表达水平。结果表明,谷氨酸能AAV病毒激活后模型组大鼠抑郁样行为表型、ACC及vHPC神经元形态结构、突触超微结构损伤更加加重,而GR、CX3CR1阻断剂均能不同程度逆转其异常改变,提示ACC脑区内胶质细胞GR/CX3CR1双信号介导的ACC-vHPC谷氨酸能神经环路异常激活可能与抑郁的发生发展密切相关。有趣的是,柴金解郁安神片也能显著抑制AAV病毒诱导的ACC-vHPC神经环路激活及Glu含量异常升高,同时有效逆转模型组大鼠进一步加重的抑郁样行为和vHPC谷氨酸能神经元突触重塑,并揭示其改善腹侧海马神经元突触损伤的分子机制可能与调控突触重塑相关信号NR/CaMKⅡ、MK2/cofilin有关。综上,该文证实了柴金解�This study aims to reveal the molecular mechanism of Chaijin Jieyu Anshen Tablets(CJJYAS) in regulating the abnormal anterior cingulate cortex(ACC)-ventral hippocampus(vHPC) glutaminergic neural circuit to alleviate synaptic remodeling of ventral hippocampal neurons in depressed rats. Firstly, the study used chemogenetics to localize glutaminergic adeno-associated virus(AAV) into the ACC brain region of rats. The model of depressed rats was established by chronic unpredictable mild stress(CUMS) combined with independent feeding. The rats were randomly divided into control group, model group, AAV empty group, AAV group, AAV+ glucocorticoid receptors(GR) blocker group, AAV+chemokine receptor 1(CX3CR1) blocker group, and AAV+CJJYAS group. Depressive-like behaviors of rats were evaluated by open-field, forced-swimming, and Morris water maze tests, combined with an animal behavior analysis system. The morphological and structural changes of ACC and vHPC neurons in rats were observed by hematoxylin-eosin(HE) staining. Immunofluorescence and nuclear phosphoprotein(c-Fos) were used to detect glutaminergic neural circuit activation of ACC-vHPC in rats. The changes in dendrites, synaptic spines, and synaptic submicrostructure of vHPC neurons were observed by Golgi staining and transmission electron microscopy, respectively. The expressions of synaptic remodeling-related proteins N-methyl-D-asprtate receptor 2A(GRIN2A), N-methyl-D-asprtate receptor 2B(GRIN2B), Ca^(2+)/calmodulin-dependent protein kinase Ⅱ(CaMKⅡ), mitogen-activated protein kinase-activated protein kinase 2(MK2), and a ubiquitous actin-binding protein(cofilin) in vHPC glutaminergic neurons of rats were detected by immunofluorescence and Western blot, respectively. The results indicated that the activated glutaminergic AAV aggravated the depressive-like behaviors phenotype of rats in the model group and deteriorated the damage of morphology and structure of ACC and vHPC neurons and synaptic ultrastructure. However, both GR and CX3CR1 bloc-kers could revers

关 键 词：柴金解郁安神片 抑郁症 ACC-vHPC神经环路 突触重塑 NR/CaMKⅡ MK2/cofilin 

分 类 号：R285.5[医药卫生—中药学]