Motor dysfunction

运动功能障碍
  • 文章类型: Journal Article
    非侵入性神经调节技术已被证明可以改善帕金森病(PD)的某些运动症状。然而,目前采用的监管技术主要集中在刺激单个目标点,忽略网络和电路的功能调节。补充电机面积(SMA)在电机控制中具有重要价值,在PD患者中,其功能经常受损。匹配的SMA-初级运动皮层(M1)配对经颅磁刺激(TMS)治疗方案,这项研究阐明了通过调节SMA和M1之间的顺序和功能连接而使患者受益。
    这是一个单中心,双盲,随机对照临床试验。我们招募了78名受试者,并通过分层随机分为配对刺激组(n=39)和常规刺激组(n=39),以1:1的比例分配。每位患者接受3周的SMA-M1配对TMS或假配对刺激。在治疗开始前对受试者进行评估,干预3周后,停止治疗后3个月。这项研究的主要结果指标是统一帕金森病评定量表III,次要结果指标包括非运动功能评估,生活质量(帕金森病问卷-39),和客观评估(肌电图和功能近红外光谱)。
    使用非侵入性神经调节技术针对单一目标的临床方案通常仅改善一种功能。强调PD中的电路和网络调节对于提高TMS康复的有效性很重要。配对调节皮质回路可能是PD的潜在治疗方法。作为电机控制中的关键节点,SMA具有与基底神经节电路的直接光纤连接和与M1的复杂光纤连接,这些连接负责电机执行。SMA调节可能间接调节基底神经节回路的功能。因此,开发的皮层配对刺激模式可以重塑从SMA到M1的信息流控制.为这项研究设计的新型神经调节模型是基于PD的电路机制和先前的研究结果,具有科学基础和成为PD神经调节手段的潜力。临床试验注册:ClinicalTrials.gov,标识符[ChiCTR2400083325]。
    UNASSIGNED: Non-invasive neuroregulation techniques have been demonstrated to improve certain motor symptoms in Parkinson\'s disease (PD). However, the currently employed regulatory techniques primarily concentrate on stimulating single target points, neglecting the functional regulation of networks and circuits. The supplementary motor area (SMA) has a significant value in motor control, and its functionality is often impaired in patients with PD. The matching SMA-primary motor cortex (M1) paired transcranial magnetic stimulation (TMS) treatment protocol, which benefits patients by modulating the sequential and functional connections between the SMA and M1, was elucidated in this study.
    UNASSIGNED: This was a single-center, double-blind, randomized controlled clinical trial. We recruited 78 subjects and allocated them in a 1:1 ratio by stratified randomization into the paired stimulation (n = 39) and conventional stimulation groups (n = 39). Each patient underwent 3 weeks of matching SMA-M1 paired TMS or sham-paired stimulation. The subjects were evaluated before treatment initiation, 3 weeks into the intervention, and 3 months after the cessation of therapy. The primary outcome measure in this study was the Unified Parkinson\'s Disease Rating Scale III, and the secondary outcome measures included non-motor functional assessment, quality of life (Parkinson\'s Disease Questionnaire-39), and objective assessments (electromyography and functional near-infrared spectroscopy).
    UNASSIGNED: Clinical protocols aimed at single targets using non-invasive neuroregulation techniques often improve only one function. Emphasizing the circuit and network regulation in PD is important for enhancing the effectiveness of TMS rehabilitation. Pairing the regulation of cortical circuits may be a potential treatment method for PD. As a crucial node in motor control, the SMA has direct fiber connections with basal ganglia circuits and complex fiber connections with M1, which are responsible for motor execution. SMA regulation may indirectly regulate the function of basal ganglia circuits. Therefore, the developed cortical pairing stimulation pattern can reshape the control of information flow from the SMA to M1. The novel neuroregulation model designed for this study is based on the circuit mechanisms of PD and previous research results, with a scientific foundation and the potential to be a means of neuroregulation for PD.Clinical trial registration: ClinicalTrials.gov, identifier [ChiCTR2400083325].
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  • 文章类型: Journal Article
    中风代表一种严重的医疗状况,其特征是流向大脑的血液突然中断,导致细胞损伤或死亡。中风对个体的影响可以从轻度损伤到严重残疾。中风的治疗通常集中在步态康复上。值得注意的是,使用肌电图(EMG)和立体摄影测量法评估肌肉激活和运动学模式,分别,在步行过程中可以提供有关病理性步态状况的信息。同时测量EMG和运动学可以帮助理解特定肌肉对步态不同阶段的贡献中的功能障碍。为了这个目标,复杂性度量(例如,样本熵;近似熵;谱熵)应用于EMG和运动学已被证明可有效识别异常情况。此外,肌电图和运动学之间的条件熵可以识别步态数据和肌肉激活模式之间的关系。本研究旨在利用几种机器学习分类器,根据运动学和EMG复杂性度量来区分中风个体与健康对照。应用于EMG度量的立方支持向量机提供了最佳的分类结果,达到了99.85%的准确性。这种方法可以帮助临床医生监测中风患者运动障碍的恢复。
    A stroke represents a significant medical condition characterized by the sudden interruption of blood flow to the brain, leading to cellular damage or death. The impact of stroke on individuals can vary from mild impairments to severe disability. Treatment for stroke often focuses on gait rehabilitation. Notably, assessing muscle activation and kinematics patterns using electromyography (EMG) and stereophotogrammetry, respectively, during walking can provide information regarding pathological gait conditions. The concurrent measurement of EMG and kinematics can help in understanding disfunction in the contribution of specific muscles to different phases of gait. To this aim, complexity metrics (e.g., sample entropy; approximate entropy; spectral entropy) applied to EMG and kinematics have been demonstrated to be effective in identifying abnormal conditions. Moreover, the conditional entropy between EMG and kinematics can identify the relationship between gait data and muscle activation patterns. This study aims to utilize several machine learning classifiers to distinguish individuals with stroke from healthy controls based on kinematics and EMG complexity measures. The cubic support vector machine applied to EMG metrics delivered the best classification results reaching 99.85% of accuracy. This method could assist clinicians in monitoring the recovery of motor impairments for stroke patients.
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  • 文章类型: Journal Article
    OBJECTIVE: The rehabilitation work for patients with motor dysfunction after stroke is crucial. However, there is currently a lack of summarized evidence regarding the rehabilitation management of stroke patients in rehabilitation wards, communities, and at home. This study aims to compile relevant evidence on the rehabilitation management of patients with motor dysfunction after stroke, providing a reference for clinical and community health professionals to carry out rehabilitation interventions.
    METHODS: A systematic search was conducted in BMJ Best Practice, UpToDate, National Guidebook Clearinghouse, American Heart Association/American Stroke Association, Canadian Medical Association, National Institute for Health and Clinical Excellence, United States Department of Veterans Affairs/ Department of Defense, Registered Nurses Association of Ontario, JBI Evidence-Based Healthcare Center Database, The Cochrane Library, PubMed, Web of Science, Embase, CINAHL, CNKI, Wanfang Database, SinoMed, and other databases for all literature on the rehabilitation management of patients with motor dysfunction after stroke. This included clinical decision-making, guidelines, expert consensuses, recommended practices, systematic reviews, and evidence summaries, with the search period spanning from the establishment of each database to October 2023. Two researchers independently evaluated the quality of the literature.
    RESULTS: A total of twenty-one documents were included, consisting of 11 guidelines, 2 expert consensus, and 8 systematic reviews. Evidence was extracted and integrated from the included literature, summarizing forty-five pieces of evidence across nine areas: rehabilitation management model, rehabilitation institutions, rehabilitation teams, timing of rehabilitation interventions, rehabilitation assessment, rehabilitation programs, rehabilitation duration and frequency, rehabilitation intensity, and rehabilitation support These covered comprehensive rehabilitation management content for stroke patients in the early, subacute, and chronic phases.
    CONCLUSIONS: The best evidence summarized in this study for the rehabilitation management of patients with motor dysfunction after stroke is comprehensive and of high quality. It provides important guidance for clinical and community healthcare professionals in carrying out rehabilitation interventions. When applying the evidence, it is recommended to consider the current condition of the stroke patient, the extent of motor dysfunction, environmental factors, and the patient\'s preferences. Then, select the most appropriate rehabilitation plan, and adjust the type and intensity of training according to each patient\'s specific needs and preferences.
    目的: 脑卒中运动功能障碍患者康复工作的开展至关重要,然而目前缺少脑卒中患者在康复病房、社区以及家庭康复管理的相关证据总结。本研究旨在汇总脑卒中运动功能障碍患者康复管理的相关证据,为临床和社区医护人员开展康复干预提供参考依据。方法: 系统检索BMJ Best Practice、UpToDate、美国国立指南库、美国心脏协会/美国卒中协会、加拿大医学会、英国国家卫生与临床优化研究所、美国退伍军人事务部/国防部、加拿大安大略注册护士协会、JBI循证卫生保健中心数据库、The Cochrane Library、PubMed、Web of Science、Embase、CINAHL、中国知网、万方数据库、维普数据库、中国生物医学文献系统中关于脑卒中运动功能障碍患者康复管理的所有文献,包括临床决策、指南、专家共识、推荐实践、系统评价、证据总结,检索时限为建库至2023年10月。由2名研究者独立对文献进行质量评价。结果: 共纳入21篇文献,包括11篇指南、2篇专家共识和8篇系统评价。通过对纳入文献的证据进行提取与整合,从康复管理模式、康复机构、康复团队、康复介入时机、康复评估、康复项目、康复时间和频率、康复强度和康复支持9个领域中汇总45条证据,涵盖了脑卒中患者早期、亚急性期和慢性期全病程的三级康复管理的相关内容。结论: 本研究汇总的脑卒中运动功能障碍患者康复管理的最佳证据较为全面,证据质量较高,对临床和社区医护人员开展康复干预具有重要指导意义。建议应用证据时,综合考虑脑卒中患者当前病情、运动功能受损情况、环境因素和患者的意愿,然后选择最适合的康复方案,并根据每位患者的具体需求和喜好调整训练的种类和强度。.
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  • 文章类型: Journal Article
    本研究旨在利用潜在生长模型(LGM)探索帕金森病(PD)患者运动功能障碍的发展轨迹,并探讨抑郁症与运动功能障碍之间的关系。
    通过帕金森进展标志物倡议(PPMI)收集了389名PD患者的四年随访数据。首先,采用单变量LGM检查PD患者运动功能障碍的发展轨迹.随后,抑郁水平作为协变量引入模型,并进一步将抑郁症作为平行生长潜在变量来研究运动功能障碍与抑郁症之间的纵向关系。
    在运动功能障碍的轨迹分析中,二次增长LGM模型的拟合指数为χ2=7.419,df=6,CFI=0.998,TLI=0.997,SRMR=0.019,RMSEA=0.025,表明运动功能障碍的增长趋势遵循二次曲线而不是简单的线性模式。将抑郁症状引入时变协变量以探讨其对运动功能障碍的影响显示出显着正相关(β=0.383,p=0.026;β=0.675,p<0.001;β=0.385,p=0.019;β=0.415,p=0.014;β=0.614,p=0.003),这表明随着抑郁水平的增加,运动功能障碍评分也增加。将抑郁症视为LGM中的平行发育过程,抑郁症截距对运动功能障碍截距的回归系数,运动功能障碍斜率上的抑郁斜率,抑郁二次因子对运动功能障碍二次因子的影响为0.448(p=0.046),1.316(p=0.003),和1.496(p=0.038),分别。这些显著的回归系数表明抑郁症和运动功能障碍之间的复杂关系,不仅涉及初始水平关联,还涉及随时间的增长趋势和可能的二次效应。
    这项研究表明PD运动功能障碍的二次增长轨迹,表明严重程度持续增加,增长率逐渐减速。抑郁症和运动功能障碍之间的关系是复杂的,涉及最初的协会,随着时间的推移不断演变的趋势,和潜在的二次效应。抑郁症状的加重可能与运动功能恶化有关。
    UNASSIGNED: This study aims to utilize latent growth model (LGM) to explore the developmental trajectory of motor dysfunction in Parkinson\'s disease (PD) patients and investigate the relationship between depression and motor dysfunction.
    UNASSIGNED: Four-year follow-up data from 389 PD patients were collected through the Parkinson\'s Progression Marker Initiative (PPMI). Firstly, a univariate LGM was employed to examine the developmental trajectory of motor dysfunction in PD patients. Subsequently, depression levels were introduced as covariates into the model, and depression was further treated as a parallel growth latent variable to study the longitudinal relationship between motor dysfunction and depression.
    UNASSIGNED: In the trajectory analysis of motor dysfunction, the fit indices for the quadratic growth LGM model were χ2 = 7.419, df = 6, CFI = 0.998, TLI = 0.997, SRMR = 0.019, and RMSEA = 0.025, indicating that the growth trend of motor dysfunction follows a quadratic curve rather than a simple linear pattern. Introducing depression symptoms as time-varying covariates to explore their effect on motor dysfunction revealed significant positive correlations (β = 0.383, p = 0.026; β = 0.675, p < 0.001; β = 0.385, p = 0.019; β = 0.415, p = 0.014; β = 0.614, p = 0.003), suggesting that as depression levels increase, motor dysfunction scores also increase. Treating depression as a parallel developmental process in the LGM, the regression coefficients for depression intercept on motor dysfunction intercept, depression slope on motor dysfunction slope, and depression quadratic factor on motor dysfunction quadratic factor were 0.448 (p = 0.046), 1.316 (p = 0.003), and 1.496 (p = 0.038), respectively. These significant regression coefficients indicate a complex relationship between depression and motor dysfunction, involving not only initial level associations but also growth trends over time and possible quadratic effects.
    UNASSIGNED: This study indicates a quadratic growth trajectory for motor dysfunction in PD, suggesting a continuous increase in severity with a gradual deceleration in growth rate. The relationship between depression and motor dysfunction is complex, involving initial associations, evolving trends over time, and potential quadratic effects. Exacerbation of depressive symptoms may coincide with motor function deterioration.
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  • 文章类型: Journal Article
    肢体运动功能障碍是缺血性脑卒中(CIS)后康复的挑战之一,极大地影响了患者的生活质量。本研究旨在探讨多模态磁共振成像(MRI)疗效的中枢机制,这将提供额外的证据来支持醒脑开窍(XNKQ)针灸的应用。
    本试验为随机对照试验。符合标准的患者将被招募并随机分为2组。一组将接受针灸治疗,另一组将不接受针灸治疗。两组均接受常规治疗。此外,将招募20名不接受任何治疗的健康个体。总疗程为14天。主要结果是多模态MRI分析。对于安全评估,将观察并记录不良事件。
    涉及人类受试者的研究得到了天津中医药大学第一教学医院IRB伦理委员会的审查和批准(TYLL2023[K]031)。这项研究符合赫尔辛基宣言。参与者提供了关于本研究的书面知情同意书。这项研究的结果将发表在同行评审的期刊上。
    中国临床试验注册中心(ChiCTR2300078315)https://www.chictr.org.cn/.
    UNASSIGNED: Limb motor dysfunction is one of the challenges in rehabilitation after cerebral ischemic stroke (CIS) and greatly affects the quality of life of patients. This study aims to investigate the central mechanisms of the curative effect with multimodal magnetic resonance imaging (MRI), which will provide additional evidence to support the application of Xingnao Kaiqiao (XNKQ) acupuncture.
    UNASSIGNED: This trial is a randomized controlled trial. Patients who meet the criteria will be recruited and randomly divided into 2 groups. One group will receive acupuncture treatment and another group will not receive acupuncture treatment. Both groups will receive conventional treatment. In addition, 20 healthy individuals will be recruited who will not receive any treatment. The total course of treatment is 14 days. The primary outcome is multimodal MRI analysis. For safety assessment, adverse events will be observed and recorded.
    UNASSIGNED: The study involving human subjects was reviewed and approved by the Ethics Committee of IRB of The First Teaching Hospital of Tianjin University of TCM (TYLL2023[K]031). This study complied with the Declaration of Helsinki. Written informed consent about this study was provided by the participants. The results of this study will be published in a peer-reviewed journal.
    UNASSIGNED: Chinese Clinical Trial Registration Center (ChiCTR2300078315) https://www.chictr.org.cn/.
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  • 文章类型: Systematic Review
    背景:帕金森病(PD)是一种神经退行性疾病,其特征是大脑中多巴胺能神经元的进行性丧失。尽管现有的治疗方法,对于可以阻止或逆转疾病进展的疗法,仍有未满足的需求.基因疗法已经尝试并测试了各种疾病,包括PD.本系统综述的目的是评估基因治疗技术在PD临床试验中的安全性和有效性。
    方法:在线数据库PubMed/Medline,和Cochrane用于筛选本系统综述的研究。使用标准工具评估纳入研究的偏倚风险。
    结果:基因疗法可以修复疾病中受损的多巴胺能神经元,或处理与帕金森病症状相关的基底神经节回路异常。而不仅仅是治疗症状,这种神经保护方法改变了疾病本身。基因治疗药物目前在患者的床边给药。它可以过度激活与运动功能障碍相关的特定脑回路。PD疗法发展迅速,并且没有足够的头对头试验来评估现有治疗方法的安全性和有效性。当选择高级疗法时,除了每种治疗方案的有效性和安全性外,还应考虑患者的具体因素.
    结论:与常规疗法相比,基因治疗可能有利于PD。它可以最大限度地减少副作用,缓解症状,并提供可靠的多巴胺替代品。
    BACKGROUND: Parkinson\'s disease (PD) is a neurodegenerative disorder characterized by the progressive loss of dopaminergic neurons in the brain. Despite existing treatments, there remains an unmet need for therapies that can halt or reverse disease progression. Gene therapy has been tried and tested for a variety of illnesses, including PD. The goal of this systematic review is to assess gene therapy techniques\' safety and effectiveness in PD clinical trials.
    METHODS: Online databases PubMed/Medline, and Cochrane were used to screen the studies for this systematic review. The risk of bias of the included studies was assessed using standard tools.
    RESULTS: Gene therapy can repair damaged dopaminergic neurons from the illness or deal with circuit anomalies in the basal ganglia connected to Parkinson\'s disease symptoms. Rather than only treating symptoms, this neuroprotective approach alters the illness itself. Medication for gene therapy is currently administered at the patient\'s bedside. It can hyperactivate specific brain circuits associated with motor dysfunction. PD therapies are developing quickly, and there aren\'t enough head-to-head trials evaluating the safety and effectiveness of available treatments. When choosing an advanced therapy, patient-specific factors should be considered in addition to the effectiveness and safety of each treatment option.
    CONCLUSIONS: In comparison to conventional therapies, gene therapy may be advantageous for PD. It may minimize side effects, relieve symptoms, and offer dependable dopamine replacement.
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  • 文章类型: Journal Article
    帕金森病(PD)是一种神经退行性疾病,常伴有肠道功能障碍。EA已显示出抗炎和神经保护作用。这里,我们的目的是探讨EA是否可以通过恢复肠屏障和调节NLRP3炎性体来治疗帕金森病。我们应用1-甲基-4-苯基-1,2,3,6-四氢吡啶(MPTP)在GV16,LR3和ST36处连续12天建立PD小鼠模型和EA。野外测试结果表明,EA减轻了抑郁和行为缺陷,上调酪氨酸羟化酶(TH)和脑源性神经营养因子(BDNF)的表达,并阻断α-突触核蛋白(α-syn)在中脑的积累。此外,EA阻断PD小鼠肠道组织的损伤,表明抑制NLRP3炎性体激活和增加肠道屏障完整性。值得注意的是,抗生素处理的小鼠实验验证了肠道微生物群对EA缓解PD运动障碍和肠道炎症至关重要。总之,这项研究表明,EA通过减轻行为缺陷对MPTP诱导的PD表现出保护作用,逆转运动功能障碍的阻滞,通过调节肠道NLRP3炎性体改善肠道屏障。最重要的是,这项研究可以为PD的发病机制和治疗提供新的见解。
    Parkinson\'s disease (PD) is a neurodegenerative disorder commonly accompanied by gut dysfunction. EA has shown anti-inflammatory and neuroprotective effects. Here, we aim to explore whether EA can treat Parkinson\'s disease by restoring the intestinal barrier and modulating NLRP3 inflammasome. We applied 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) to establish a PD mouse model and EA at the GV16, LR3, and ST36 for 12 consecutive days. The open-field test results indicated that EA alleviated depression and behavioral defects, upregulated the expressions of tyrosine hydroxylase (TH) and brain-derived neurotrophic factor (BDNF), and blocked the accumulation of α-synuclein (α-syn) in the midbrain. Moreover, EA blocked the damage to intestinal tissues of PD mice, indicative of suppressed NLRP3 inflammasome activation and increased gut barrier integrity. Notably, the antibiotic-treated mouse experiment validated that the gut microbiota was critical in alleviating PD dyskinesia and intestinal inflammation by EA. In conclusion, this study suggested that EA exhibited a protective effect against MPTP-induced PD by alleviating behavioral defects, reversing the block of motor dysfunction, and improving the gut barrier by modulating intestinal NLRP3 inflammasome. Above all, this study could provide novel insights into the pathogenesis and therapy of PD.
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  • 文章类型: Journal Article
    通过减少多巴胺(DA)消耗,已经进行了大量的研究工作,以减轻帕金森氏病(PD)的症状。这些现有疗法的一个共同特征是它们不能预防多巴胺能神经元的神经变性过程。(+)-冰片,一种天然的高度脂溶性双环单萜,据报道可以调节中枢神经系统中单胺神经递质的水平,并具有神经保护作用。然而,(+)-冰片对甲基-4-苯基-1,2,3,6-四氢吡啶(MPTP)诱导的PD小鼠多巴胺能神经元丢失的影响尚不明确。在这里,我们首次报道30mg/kg(+)-冰片显著减轻PD小鼠的运动缺陷,这得益于通过超高效液相色谱串联质谱在线结合体内脑微透析采样检测到的清醒和自由移动小鼠纹状体中DA的水平显着增加和DA的代谢率降低。值得注意的是,()-冰片增强的DA水平是通过减少黑质和纹状体中酪氨酸羟化酶免疫反应性多巴胺能神经元的损失以及促进利血平或诺米芬诱导的DA释放而实现的。PD小鼠。有趣的是,()-冰片明显抑制PDMPTP小鼠模型上DA转运蛋白(DAT)和囊泡单胺转运蛋白2(VMAT2)的表达水平降低。此外,(+)-冰片通过抑制IL-1β的产生来抑制神经炎症,IL-6和TNF-α通过降低PD小鼠的MDA水平和增加SOD和GSH-px的活性来减轻氧化应激。这些发现表明()-冰片通过抑制神经炎症和氧化应激来保护DA神经元。()-冰片的神经保护机制的进一步研究工作将集中在活性氧介导的细胞凋亡上。因此,(+)-冰片是延缓PD神经变性过程的潜在治疗候选药物。
    Considerable research efforts have been directed toward the symptom relief of Parkinson\'s disease (PD) by attenuating dopamine (DA) depletion. One common feature of these existing therapies is their unavailability of preventing the neurodegenerative process of dopaminergic neurons. (+)-Borneol, a natural highly lipid-soluble bicyclic monoterpene, has been reported to regulate the levels of monoamine neurotransmitters in the central nervous system and exhibit neuroprotective effects. However, the effect of (+)-borneol on the dopaminergic neuronal loss of methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD mice is not defined. Herein, we first report that 30 mg/kg (+)-borneol significantly attenuated the motor deficits of PD mice, which benefits from markedly increasing the level of DA and decreasing the metabolic rate of DA in the striatum of conscious and freely moving mouse detected by ultraperformance liquid chromatography tandem mass spectrometry online combined with in vivo brain microdialysis sampling. It is worth noting that the enhanced level of DA by (+)-borneol was enabled by the reduction in loss of tyrosine hydroxylase-immunoreactive dopaminergic neurons in the substantia nigra and striatum and promotion of reserpine- or nomifensine-induced DA release in PD mice. Interestingly, (+)-borneol evidently inhibited the decreased expression levels of DA transporter (DAT) and vesicular monoamine transporter 2 (VMAT2) on the MPTP mouse model of PD. Moreover, (+)-borneol suppressed the neuroinflammation by inhibiting the production of IL-1β, IL-6, and TNF-α and attenuated oxidative stress by decreasing the level of MDA and increasing the activities of SOD and GSH-px in PD mice. These findings demonstrate that (+)-borneol protects DA neurons by inhibiting neuroinflammation and oxidative stress. Further research work for the neuroprotection mechanism of (+)-borneol will focus on reactive oxygen species-mediated apoptosis. Therefore, (+)-borneol is a potential therapeutic candidate for retarding the neurodegenerative process of PD.
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  • 文章类型: Journal Article
    内囊(IC)中的皮质脊髓束(CST)出血引起的损伤会导致人类患者和啮齿动物脑出血(ICH)模型严重的神经功能障碍。已知核受体Nurr1(NR4A2)在几种神经系统疾病中发挥抗炎和神经保护作用。以前我们表明Nurr1配体可预防CST损伤并减轻ICH后小鼠的神经功能缺损。为了证明Nurr1对CST完整性的直接影响,我们研究了Nurr1在初级运动皮质神经元中的过表达对小鼠ICH病理后果的影响。纹状体内注射VII型胶原酶诱导ICH,血肿侵入IC。通过将突触蛋白I启动子驱动的腺相关病毒(AAV)载体显微注射到初级运动皮质中,可以诱导Nurr1的神经元特异性过表达。Nurr1过表达可显着减轻运动功能障碍,但对ICH后的感觉运动功能障碍仅显示出适度的影响。Nurr1过表达也保留了IC中的轴突结构,虽然对血肿相关的炎症事件没有影响,氧化应激,脑出血后纹状体神经元死亡。免疫染色显示Nurr1过表达增加了运动皮质神经元中Ret酪氨酸激酶的表达以及Akt和ERK1/2的磷酸化。此外,Nurr1配体1,1-双(3'-吲哚基)-1-(对氯苯基)甲烷或阿莫地喹的施用增加了Akt和ERK1/2的磷酸化水平以及神经胶质细胞系衍生的神经营养因子和Ret基因的表达。这些结果表明,Nurr1对纹状体ICH的治疗作用归因于通过作用于皮质神经元而保留了CST。
    Hemorrhage-induced injury of the corticospinal tract (CST) in the internal capsule (IC) causes severe neurological dysfunction in both human patients and rodent models of intracerebral hemorrhage (ICH). A nuclear receptor Nurr1 (NR4A2) is known to exert anti-inflammatory and neuroprotective effects in several neurological disorders. Previously we showed that Nurr1 ligands prevented CST injury and alleviated neurological deficits after ICH in mice. To prove direct effect of Nurr1 on CST integrity, we examined the effect of Nurr1 overexpression in neurons of the primary motor cortex on pathological consequences of ICH in mice. ICH was induced by intrastriatal injection of collagenase type VII, where hematoma invaded into IC. Neuron-specific overexpression of Nurr1 was induced by microinjection of synapsin I promoter-driven adeno-associated virus (AAV) vector into the primary motor cortex. Nurr1 overexpression significantly alleviated motor dysfunction but showed only modest effect on sensorimotor dysfunction after ICH. Nurr1 overexpression also preserved axonal structures in IC, while having no effect on hematoma-associated inflammatory events, oxidative stress, and neuronal death in the striatum after ICH. Immunostaining revealed that Nurr1 overexpression increased the expression of Ret tyrosine kinase and phosphorylation of Akt and ERK1/2 in neurons in the motor cortex. Moreover, administration of Nurr1 ligands 1,1-bis(3\'-indolyl)-1-(p-chlorophenyl)methane or amodiaquine increased phosphorylation levels of Akt and ERK1/2 as well as expression of glial cell line-derived neurotrophic factor and Ret genes in the cerebral cortex. These results suggest that the therapeutic effect of Nurr1 on striatal ICH is attributable to the preservation of CST by acting on cortical neurons.
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  • 文章类型: Journal Article
    神经元丢失是阿尔茨海默病(AD)的中心问题,然而,迄今为止尚未开发出可以阻止AD相关神经变性的治疗方法。这里,我们开发了针对217位点磷酸化的人tau(p-tau217)的单克隆抗体(mAb2A7),并观察到p-tau217水平与AD患者的脑萎缩和认知障碍呈正相关.鼻内给药有效地将mAb2A7递送到雄性PS19tau病鼠脑中,具有靶接合和减少tau病理/聚集,而对总可溶性tau几乎没有影响。Further,mAb2A7治疗阻断了凋亡相关的神经元丢失和脑萎缩,逆转的认知缺陷,并改善雄性牛磺酸病鼠的运动功能。蛋白质组学分析显示,mAb2A7治疗逆转了主要与鼠tau蛋白病和AD脑中观察到的突触功能相关的蛋白质的改变。靶向总tau的抗体(13G4)也减弱了tau相关的病理学和神经变性,但损害了雄性tau病鼠的运动功能。这些结果暗示p-tau217是AD相关神经变性的潜在治疗靶标。
    Neuronal loss is the central issue in Alzheimer\'s disease (AD), yet no treatment developed so far can halt AD-associated neurodegeneration. Here, we developed a monoclonal antibody (mAb2A7) against 217 site-phosphorylated human tau (p-tau217) and observed that p-tau217 levels positively correlated with brain atrophy and cognitive impairment in AD patients. Intranasal administration efficiently delivered mAb2A7 into male PS19 tauopathic mouse brain with target engagement and reduced tau pathology/aggregation with little effect on total soluble tau. Further, mAb2A7 treatment blocked apoptosis-associated neuronal loss and brain atrophy, reversed cognitive deficits, and improved motor function in male tauopathic mice. Proteomic analysis revealed that mAb2A7 treatment reversed alterations mainly in proteins associated with synaptic functions observed in murine tauopathy and AD brain. An antibody (13G4) targeting total tau also attenuated tau-associated pathology and neurodegeneration but impaired the motor function of male tauopathic mice. These results implicate p-tau217 as a potential therapeutic target for AD-associated neurodegeneration.
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