通脉开窍丸治疗血管性痴呆模型大鼠海马区神经元的铁死亡变化  

Changes in ferroptosis in hippocampal neurons of vascular dementia model rats treated with Tongmai Kaiqiao Pill

作　　者：赵楠楠 李彦杰[2] 秦合伟[2] 朱博超 丁慧敏 徐振华 Zhao Nannan;Li Yanjie;Qin Hewei;Zhu Bochao;Ding Huimin;Xu Zhenhua(School of Rehabilitation,Henan University of Chinese Medicine,Zhengzhou 450046,Henan Province,China;Department of Rehabilitation,Henan Provincial Hospital of TCM,Zhengzhou 450046,Henan Province,China)

机构地区：[1]河南中医药大学康复医学院,河南省郑州市450046 [2]河南省中医院康复科,河南省郑州市450046

出　　处：《中国组织工程研究》2025年第7期1401-1407,共7页Chinese Journal of Tissue Engineering Research

基　　金：中原英才计划中原青年拔尖人才项目(豫组通[2021]44号),项目负责人:秦合伟;河南省高等学校重点科研项目(19A360024),项目负责人:李彦杰;河南省中医药拔尖人才培养项目专项课题(2022ZYBJ15),项目负责人:秦合伟。

摘　　要：背景:研究表明铁死亡与血管性痴呆存在密切联系,通脉开窍丸对于改善血管性痴呆患者的认知功能有一定疗效,但其作用机制不明确。目的:基于核因子E2相关因子2(nuclear factor erythroid-2 related factor 2,Nrf2)/血红素氧合酶1(heme oxygenase-1,HO-1)/谷胱甘肽过氧化物酶4(glutathione peroxidase 4,GPX4)信号通路调控铁死亡探讨通脉开窍丸对血管性痴呆干预作用以及分子机制。方法:84只雄性SD大鼠,其中12只大鼠用作假手术组,其余大鼠用改良2-VO法制备成血管性痴呆的模型,成模后随机分为模型组、通脉开窍丸高、中、低剂量(27.6,13.8,6.9 g/kg)组、联合组[通脉开窍丸高剂量+ML385(20 mg/kg)]、盐酸多奈哌齐组(0.45 mg/kg),灌胃给药1次/d,联合组同时腹腔注射Nrf2抑制剂ML385,1次/d,连续4周。采用Morris水迷宫检测大鼠的学习记忆能力;苏木精-伊红染色观察各组大鼠海马组织中神经元病理学变化;比色法试剂盒检测大鼠血清中还原型谷胱甘肽、Fe^(2+)、丙二醛的浓度;普鲁士蓝染色法检测大鼠海马组织中铁沉积情况;透射电镜观察大鼠海马组织中神经元线粒体超微结构变化;蛋白免疫印迹法检测大鼠海马神经元Nrf2、HO-1、GPX4、XCT、铁蛋白重链1(ferritin heavy chain 1,FTH1)蛋白的表达。结果与结论:(1)与假手术相比,模型组大鼠逃避潜伏期时间明显延长(P<0.05),穿越平台次数明显减少(P<0.05);海马组织松散,神经元细胞核深染,染色质固缩甚至裂解;CA1区铁离子聚集;线粒体萎缩变小,线粒体嵴溶解消失,线粒体膜密度增厚;血清中Fe^(2+)、丙二醛水平上升,还原型谷胱甘肽水平下降(P<0.05);海马组织GPX4、HO-1、XCT、Nrf2、FTH1蛋白表达显著降低(P<0.05)。(2)与模型组相比,通脉开窍丸各剂量组和盐酸多奈哌齐组大鼠平均逃避潜伏期均明显缩短(P<0.05),穿越平台次数增加(P<0.05);海马神经元恢复明显,CA1区神经元铁离子聚集明显减�BACKGROUND:Research has demonstrated a close association between ferroptosis and vascular dementia.Tongmai Kaiqiao Pill has a certain effect on improving the cognitive function of vascular dementia patients,but its mechanism is unclear.OBJECTIVE:To explore the interventional effects and molecular mechanisms of Tongmai Kaiqiao Pill for vascular dementia based on the regulation of ferroptosis by the nuclear factor erythroid-2-related factor 2(Nrf2)/heme oxygenase-1(HO-1)/glutathione peroxidase 4(GPX4)signaling pathway.METHODS:Among eighty-four SD male rats,12 rats were used as the sham-operated group,and the rest of them were prepared as a model of vascular dementia by the modified 2-VO method,and then randomly divided into the model group,the Tongmai Kaiqiao Pills high-,moderate-,and low-dosage(27.6,13.8,and 6.9 g/kg)groups,the combined group(Tongmai Kaiqiao Pill high-dosage+ML385,20 mg/kg),and the donepezil hydrochloride group(0.45 mg/kg).The drug was given once a day by intragastric administration.The combined group was also intraperitoneally injected Nrf2 inhibitor ML385,once a day,for 4 weeks.Morris water maze was used to detect the learning memory ability of rats.Hematoxylin-eosin staining was used to observe the histopathological changes in the hippocampus of rats in each group.Colorimetric assay was used to detect the content of reduced glutathione,ferrous ion(Fe~(2+)),and malondialdehyde in the serum of rats.Prussian blue staining was used to detect the iron deposition in the hippocampal tissue of rats.Transmission electron microscopy was used to observe the ultrastructural changes of mitochondria in rat hippocampal tissues.Western blot assay was used to detect the protein expression levels of Nrf2,HO-1,GPX4,XCT,and ferritin heavy chain 1(FTH1)in rat hippocampal tissues.RESULTS AND CONCLUSION:(1)In comparison to the sham operation,rats in the model group exhibited a significantly prolonged latency period(P<0.05)and a reduced number of platform crossings(P<0.05).Additionally,the hippocampal tissues of these

关 键 词：血管性痴呆 神经元 通脉开窍丸 核因子E2相关因子2 血红素氧合酶1 谷胱甘肽过氧化物酶4 铁死亡 

分 类 号：R496[医药卫生—康复医学] R318[医药卫生—临床医学] R446