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| 1 | 电针对帕金森病小鼠Nrf2/NLRP3/Caspase-1通路介导的细胞焦亡的影响显示文摘目的:观察电针对帕金森病(PD)小鼠黑质中核转录因子E2相关因子2(Nrf2)/NOD样受体家族蛋白3(NLRP3)/半胱氨酸蛋白酶-1(Caspase-1)通路的影响,探讨其神经保护机制。方法:将40只C57BL/6雄性小鼠随机分为正常组、模型组、假电针组、电针组,每组10只。采用鱼藤酮灌胃4周建立PD小鼠模型。电针组于“风府”和双侧“太冲”“足三里”给予电针刺激,每日1次,连续2周;假电针组于同样穴位浅刺至皮下,连接电针仪后不通电,其余操作均同电针组。采用敞箱实验观察各组小鼠的行为学变化,酶联免疫吸附法检测小鼠血清中白细胞介素(IL)-1β和IL-18含量,免疫组织化学法检测小鼠黑质中酪氨酸羟化酶(TH)阳性表达,实时荧光定量PCR法检测小鼠黑质中Nrf2、NLRP3、Caspase-1、消皮素D(GSDMD)、IL-1β和IL-18mRNA表达水平,Western blot法检测小鼠黑质中Nrf2、NLRP3、Caspase-1和GSDMD蛋白表达水平。结果:与正常组比较,模型组小鼠行为学评分升高(P<0.01),自主运动的总时间缩短、总路程减少、平均速度降低(P<0.01),血清IL-1β和IL-18含量增加(P<0.01),黑质中TH阳性表达减少(P<0.01),Nrf2mRNA和蛋白表达降低(P<0.01),NLRP3、Caspase-1、GSDMD mRNA和蛋白表达水平及IL-1β、IL-18mRNA表达水平均升高(P<0.01)。与模型组、假电针组比较,电针组小鼠行为学评分降低(P<0.01),自主运动的总时间延长、总路程增加、平均速度升高(P<0.01),血清IL-1β和IL-18含量减少(P<0.01,P<0.05),黑质中TH阳性表达增加(P<0.01),Nrf2 mRNA和蛋白表达水平升高(P<0.01,P<0.05),NLRP3、Caspase-1、GSDMD mRNA和蛋白表达水平及IL-1β、IL-18 mRNA表达水平均降低(P<0.01)。与模型组比较,假电针组小鼠上述各项指标差异均无统计学意义。结论:电针“风府”“太冲”和“足三里”可改善PD小鼠运动障碍,减少黑质多巴胺神经元的丢失,抑制神经炎性反应,其作用机制可能与调控Nrf2/NLRP3/Caspase-1通路介导的细胞焦亡相关。 | 张小蕾 胡梦妮 荣臻 李亚楠 汪瑶 马骏 | 2024 | 针刺研究2024，49，1： | 0 |
| 2 | Exosomes derived from microglia overexpressing miR-124-3p alleviate neuronal endoplasmic reticulum stress damage after repetitive mild traumatic brain injury显示文摘We previously reported that miR-124-3p is markedly upregulated in microglia-derived exosomes following repetitive mild traumatic brain injury.However,its impact on neuronal endoplasmic reticulum stress following repetitive mild traumatic brain injury remains unclear.In this study,we first used an HT22 scratch injury model to mimic traumatic brain injury,then co-cultured the HT22 cells with BV2 microglia expressing high levels of miR-124-3p.We found that exosomes containing high levels of miR-124-3p attenuated apoptosis and endoplasmic reticulum stress.Furthermore,luciferase reporter assay analysis confirmed that miR-124-3p bound specifically to the endoplasmic reticulum stress-related protein IRE1α,while an IRE1αfunctional salvage experiment confirmed that miR-124-3p targeted IRE1αand reduced its expression,thereby inhibiting endoplasmic reticulum stress in injured neurons.Finally,we delivered microglia-derived exosomes containing miR-124-3p intranasally to a mouse model of repetitive mild traumatic brain injury and found that endoplasmic reticulum stress and apoptosis levels in hippocampal neurons were significantly reduced.These findings suggest that,after repetitive mild traumatic brain injury,miR-124-3 can be transferred from microglia-derived exosomes to injured neurons,where it exerts a neuroprotective effect by inhibiting endoplasmic reticulum stress.Therefore,microglia-derived exosomes containing miR-124-3p may represent a novel therapeutic strategy for repetitive mild traumatic brain injury. | Yan Wang Dai Li Lan Zhang Zhenyu Yin Zhaoli Han Xintong Ge Meimei Li Jing Zhao Shishuang Zhang Yan Zuo Xiangyang Xiong Han Gao Qiang Liu Fanglian Chen Ping Lei | 2024 | Neural Regeneration Research2024，19，9： | 0 |
| 3 | Gut microbiota dysbiosis contributes toα-synuclein-related pathology associated with C/EBPβ/AEP signaling activation in a mouse model of Parkinson’s disease显示文摘Parkinson’s disease is a neurodegenerative disease characterized by motor and gastrointestinal dysfunction.Gastrointestinal dysfunction can precede the onset of motor symptoms by several years.Gut microbiota dysbiosis is involved in the pathogenesis of Parkinson’s disease,whether it plays a causal role in motor dysfunction,and the mechanism underlying this potential effect,remain unknown.CCAAT/enhancer binding proteinβ/asparagine endopeptidase(C/EBPβ/AEP)signaling,activated by bacterial endotoxin,can promoteα-synuclein transcription,thereby contributing to Parkinson’s disease pathology.In this study,we aimed to investigate the role of the gut microbiota in C/EBPβ/AEP signaling,α-synuclein-related pathology,and motor symptoms using a rotenone-induced mouse model of Parkinson’s disease combined with antibiotic-induced microbiome depletion and fecal microbiota transplantation.We found that rotenone administration resulted in gut microbiota dysbiosis and perturbation of the intestinal barrier,as well as activation of the C/EBP/AEP pathway,α-synuclein aggregation,and tyrosine hydroxylase-positive neuron loss in the substantia nigra in mice with motor deficits.However,treatment with rotenone did not have any of these adverse effects in mice whose gut microbiota was depleted by pretreatment with antibiotics.Importantly,we found that transplanting gut microbiota derived from mice treated with rotenone induced motor deficits,intestinal inflammation,and endotoxemia.Transplantation of fecal microbiota from healthy control mice alleviated rotenone-induced motor deficits,intestinal inflammation,endotoxemia,and intestinal barrier impairment.These results highlight the vital role that gut microbiota dysbiosis plays in inducing motor deficits,C/EBPβ/AEP signaling activation,andα-synuclein-related pathology in a rotenone-induced mouse model of Parkinson’s disease.Additionally,our findings suggest that supplementing with healthy microbiota may be a safe and effective treatment that could help ameliorate the progression of motor deficits in patients with Parkinson’s disease. | Xiaoli Fang Sha Liu Bilal Muhammad Mingxuan Zheng Xing Ge Yan Xu Shu Kan Yang Zhang Yinghua Yu Kuiyang Zheng Deqin Geng Chun-Feng Liu | 2024 | Neural Regeneration Research2024，19，9： | 0 |
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