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Cortico–subcortical spatiotemporal dynamics in Parkinson’s disease can be modulated by transcranial alternating current stimulation 帕金森病的皮层-皮层下时空动力学可以通过经颅交流电刺激进行调节
Pub Date : 2023-06-01 DOI: 10.26599/BSA.2023.9050009
Tiantian Liu, Zilong Yan, Ziteng Han, Jian Zhang, Boyan Fang, Tianyi Yan
Objective: We investigated changes in cortico–subcortical spatiotemporal dynamics to explore the treatment mechanisms of transcranial alternating current stimulation (tACS) in patients with Parkinson’s disease (PD). Methods: Resting-state functional magnetic resonance imaging (rs-fMRI) data were collected from 20 patients with PD and 20 normal controls (NC). Each patient with PD received successive multidisciplinary intensive rehabilitation treatment and tACS treatment over a one-year interval. Individual functional brain network mapping and co-activation pattern (CAP) analysis were performed to characterize cortico–subcortical dynamics. Results: The same tACS electrode placement stimulated different proportions of functional brain networks across the participants. CAP analysis revealed that the visual network, attentional network, and default mode network co-activated with the thalamus, accumbens, and amygdala, respectively. The pattern characterized by the de-activation of the visual network and the activation of the thalamus showed a significantly low amplitude in the patients with PD than in NCs, and this amplitude increased after tACS treatment. Furthermore, the co-occurrence of cortico–subcortical CAPs was significantly higher in patients with PD than in NCs and decreased after tACS treatment. Conclusions: This study investigated cortico–subcortical spatiotemporal dynamics in patients with PD and further revealed the tACS treatment mechanism. These findings contribute to understanding cortico– subcortical dynamics and exploring noninvasive neuromodulation targets of cortico–subcortical circuits in brain diseases, such as PD, Alzheimer’s disease, and depression.
目的:研究帕金森病(PD)患者皮质-皮质下时空动力学的变化,探讨经颅交流电刺激(tACS)的治疗机制。方法:收集20例帕金森病患者和20例正常对照者的静息状态功能性磁共振成像(rs-fMRI)数据。每位帕金森病患者在一年内接受了连续的多学科强化康复治疗和tACS治疗。进行个体功能性脑网络映射和共激活模式(CAP)分析,以表征皮质下动力学。结果:相同的tACS电极放置刺激了参与者不同比例的功能性脑网络。CAP分析显示,视觉网络、注意力网络和默认模式网络分别与丘脑、伏隔和杏仁核共同激活。以视觉网络去激活和丘脑激活为特征的模式在PD患者中显示出明显低于NCs的振幅,并且在tACS治疗后该振幅增加。此外,PD患者的皮质下CAPs的共现率显著高于NCs,并在tACS治疗后降低。结论:本研究研究研究了帕金森病患者的皮质-皮质下时空动力学,进一步揭示了tACS的治疗机制。这些发现有助于理解皮质下动力学,并探索脑疾病(如PD、阿尔茨海默病和抑郁症)中皮质下回路的无创神经调控靶点。
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引用次数: 2
The altered network complexity of resting-state functional brain activity in schizophrenia and bipolar disorder patients 精神分裂症和双相情感障碍患者静息状态功能性脑活动网络复杂性的改变
Pub Date : 2023-06-01 DOI: 10.26599/BSA.2023.9050007
Yan Niu, N. Zhang, Mengni Zhou, Lan Yang, Jie Sun, Xue-Qing Cheng, Yanan Li, Lefan Guo, Jie Xiang, Bin Wang
Schizophrenia (SZ) and bipolar disorder (BD) are two of the most frequent mental disorders. These disorders exhibit similar psychotic symptoms, making diagnosis challenging and leading to misdiagnosis. Yet, the network complexity changes driving spontaneous brain activity in SZ and BD patients are still unknown. Functional entropy (FE) is a novel way of measuring the dispersion (or spread) of functional connectivities inside the brain. The FE was utilized in this study to examine the network complexity of the resting-state fMRI data of SZ and BD patients at three levels, including global, modules, and nodes. At three levels, the FE of SZ and BD patients was considerably lower than that of normal control (NC). At the intra-module level, the FE of SZ was substantially higher than that of BD in the cingulo-opercular network. Moreover, a strong negative association between FE and clinical measures was discovered in patient groups. Finally, we classified using the FE features and attained an accuracy of 66.7% (BD vs. SZ vs. NC) and an accuracy of 75.0% (SZ vs. BD). These findings proposed that network connectivity’s complexity analyses using FE can provide important insights for the diagnosis of mental illness.
精神分裂症(SZ)和双相情感障碍(BD)是两种最常见的精神障碍。这些疾病表现出类似的精神病症状,使诊断具有挑战性并导致误诊。然而,在SZ和BD患者中,驱动自发脑活动的网络复杂性变化尚不清楚。功能熵(Functional entropy, FE)是一种测量大脑内部功能连接分散(或扩散)的新方法。本研究利用FE从全局、模块和节点三个层面对SZ和BD患者静息状态fMRI数据的网络复杂度进行了检测。在三个水平上,SZ和BD患者的FE明显低于正常对照(NC)。在模内水平,SZ在扣眼-眼窝网络中的FE明显高于BD。此外,在患者组中发现FE与临床措施之间存在强烈的负相关。最后,我们使用FE特征进行分类,准确率为66.7% (BD vs. SZ vs. NC),准确率为75.0% (SZ vs. BD)。这些发现表明,利用神经网络连接的复杂性分析可以为精神疾病的诊断提供重要的见解。
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引用次数: 1
High amplitude high frequency oscillations during posttraumatic epileptogenesis 创伤后癫痫发生时的高振幅高频振荡
Pub Date : 2023-03-01 DOI: 10.26599/bsa.2023.9050006
Jagannathan Rangarajan, Udaya Kumar
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引用次数: 0
Activatable molecular fluorescence probes for the imaging and detection of ischemic stroke 可激活分子荧光探针用于缺血性脑卒中的成像和检测
Pub Date : 2023-02-27 DOI: 10.26599/BSA.2023.9050003
Mengdie Wang, Yan Zhang
The real-time, noninvasive, nonionizing, high spatiotemporal resolution, and flexibility characteristics of molecular fluorescence imaging provide a uniquely powerful approach to imaging and monitoring the physiology and pathophysiology of ischemic stroke. Currently, various fluorescence probes have been synthesized with the aim of improving quantitative and quantitative studies of the pathologic processes of ischemic stroke in living animals. In this review, we present an overview of current activatable fluorescence probes for the imaging and diagnosis of ischemic stroke in animal models. We categorize the probes based on their activatable signals from the biomarkers associated with ischemic stroke, and we present representative examples of their functional mechanisms. Finally, we briefly discuss future perspectives in this field.
分子荧光成像的实时性、非侵入性、非离子性、高时空分辨率和灵活性为缺血性脑卒中的生理和病理生理成像和监测提供了一种独特而强大的方法。目前,已经合成了各种荧光探针,目的是改进对活体动物缺血性中风病理过程的定量和定量研究。在这篇综述中,我们概述了目前可激活荧光探针在动物模型中用于缺血性中风的成像和诊断。我们根据与缺血性中风相关的生物标志物的可激活信号对探针进行分类,并介绍了其功能机制的代表性例子。最后,我们简要讨论了该领域的未来前景。
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引用次数: 1
NMDARs regulate the excitatory-inhibitory balance within neural circuits NMDARs调节神经回路内的兴奋-抑制平衡
Pub Date : 2023-02-27 DOI: 10.26599/BSA.2022.9050020
Liang Zhou, Xiaohui Sun, Jingjing Duan
Excitatory-inhibitory (E/I) balance is essential for normal neural development, behavior and cognition. E/I imbalance leads to a variety of neurological disorders, such as autism and schizophrenia. NMDA receptors (NMDARs) regulate AMPAR-mediated excitatory and GABAAR-mediated inhibitory synaptic transmission, suggesting that NMDARs play an important role in the establishment and maintenance of the E/I balance. In this review, we briefly introduced NMDARs, AMPARs and GABAARs, summarized the current studies on E/I balance mediated by NMDARs, and discussed the current advances in NMDAR-mediated AMPAR and GABAAR development. Specifically, we analyzed the role of NMDAR subunits in the establishment and maintenance of E/I balance, which may provide new therapeutic strategies for the recovery of E/I imbalance in neurological disorders.
兴奋-抑制(E/I)平衡对正常的神经发育、行为和认知至关重要。E/I失衡会导致各种神经系统疾病,如自闭症和精神分裂症。NMDA受体(NMDARs)调节AMPAR介导的兴奋性和GABAAR介导的抑制性突触传递,表明NMDARs在建立和维持E/I平衡中发挥着重要作用。在这篇综述中,我们简要介绍了NMDARs、AMPARs和GABAARs,总结了NMDAR介导的E/I平衡的研究现状,并讨论了NMDAR介导的AMPAR和GABAAR发展的最新进展。具体而言,我们分析了NMDAR亚基在建立和维持E/I平衡中的作用,这可能为神经系统疾病E/I失衡的恢复提供新的治疗策略。
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引用次数: 1
Substrate stiffness in nerve cells 神经细胞的基质硬度
Pub Date : 2023-02-27 DOI: 10.26599/BSA.2023.9050002
Weijin Si, J. Gong, Xiaofei Yang
Recently, substrate stiffness has been involved in the physiology and pathology of the nervous system. However, the role and function of substrate stiffness remain unclear. Here, we review known effects of substrate stiffness on nerve cell morphology and function in the central and peripheral nervous systems and their involvement in pathology. We hope this review will clarify the research status of substrate stiffness in nerve cells and neurological disorder.
近年来,基底刚度已被纳入神经系统的生理和病理研究。然而,基体刚度的作用和功能仍不清楚。在这里,我们回顾了已知的底物硬度对中枢和周围神经系统神经细胞形态和功能的影响及其在病理中的作用。我们希望这篇综述能澄清神经细胞和神经系统疾病中底物硬度的研究现状。
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引用次数: 3
The regulation of host cytoskeleton during SARS-CoV-2 infection in the nervous system 神经系统感染SARS-CoV-2时宿主细胞骨架的调控
Pub Date : 2023-02-27 DOI: 10.26599/BSA.2023.9050004
Qian Zhang, Yaming Jiu
The global economy and public health are currently under enormous pressure since the outbreak of COVID-19. Apart from respiratory discomfort, a subpopulation of COVID-19 patients exhibits neurological symptoms such as headache, myalgia, and loss of smell. Some have even shown encephalitis and necrotizing hemorrhagic encephalopathy. The cytoskeleton of nerve cells changes drastically in these pathologies, indicating that the cytoskeleton and its related proteins are closely related to the pathogenesis of nervous system diseases. In this review, we present the up-to-date association between host cytoskeleton and coronavirus infection in the context of the nervous system. We systematically summarize cytoskeleton-related pathogen-host interactions in both the peripheral and central nervous systems, hoping to contribute to the development of clinical treatment in COVID-19 patients.
自新冠肺炎爆发以来,全球经济和公共卫生目前面临巨大压力。除了呼吸不适,新冠肺炎患者亚群还表现出头痛、肌痛和嗅觉丧失等神经系统症状。有些甚至表现出脑炎和坏死性出血性脑病。在这些病理中,神经细胞的细胞骨架发生了剧烈变化,表明细胞骨架及其相关蛋白与神经系统疾病的发病机制密切相关。在这篇综述中,我们介绍了神经系统中宿主细胞骨架与冠状病毒感染之间的最新关联。我们系统地总结了外周神经系统和中枢神经系统中与细胞骨架相关的病原体-宿主相互作用,希望为新冠肺炎患者的临床治疗发展做出贡献。
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引用次数: 2
Neuronal excitation regulation and beyond 神经元兴奋调节及其他
Pub Date : 2023-02-27 DOI: 10.26599/BSA.2023.9050005
Shangbang Gao, Yan Zhang
Human brain is composed by 10 billion of neurons
人脑是由100亿个神经元组成的
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引用次数: 0
BK channels in microglia 小胶质细胞中的BK通道
Pub Date : 2022-12-01 DOI: 10.26599/BSA.2023.9050001
Xiaohui Sun
Large-conductance calcium- and voltage-dependent potassium (BK) channels are ubiquitously expressed in mammalian cells and participate in various physiological and pathological processes such as neurotransmission and cerebral ischemia. BK channels comprise up to four pore-forming α subunits and zero to four accessory subunits. Although microglial BK currents were initially recorded 27 years ago, their roles have long been elusive. Studies have demonstrated that BK channels modulate the activation, phagocytosis, and probably migration of microglia and have associated microglial BK channels with many neurological diseases, including neuropathic pain and stroke. This review summarizes the available information regarding the biophysical, functional, and pathological aspects of microglial BK channels and discusses future directions of research into these channels.
大电导钙和电压依赖性钾(BK)通道在哺乳动物细胞中普遍表达,并参与各种生理和病理过程,如神经传递和脑缺血。BK通道包含多达四个成孔α亚基和零至四个附属亚基。尽管小胶质细胞BK电流最初记录于27年前,但它们的作用一直难以捉摸。研究表明,BK通道调节小胶质细胞的激活、吞噬作用,可能还有迁移,并与许多神经疾病相关,包括神经性疼痛和中风。这篇综述总结了关于小胶质细胞BK通道的生物物理、功能和病理方面的可用信息,并讨论了这些通道的未来研究方向。
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引用次数: 1
Circadian dysregulation and Alzheimer’s disease: A comprehensive review 昼夜节律失调与阿尔茨海默病:一项全面的综述
Pub Date : 2022-11-30 DOI: 10.26599/BSA.2022.9050021
Peter Iacobelli
Alzheimer’s disease (AD), the foremost variant of dementia, has been associated with a menagerie of risk factors, many of which are considered to be modifiable. Among these modifiable risk factors is circadian rhythm, the chronobiological system that regulates sleep‐wake cycles, food consumption timing, hydration timing, and immune responses amongst many other necessary physiological processes. Circadian rhythm at the level of the suprachiasmatic nucleus (SCN), is tightly regulated in the human body by a host of biomolecular substances, principally the hormones melatonin, cortisol, and serotonin. In addition, photic information projected along afferent pathways to the SCN and peripheral oscillators regulates the synthesis of these hormones and mediates the manner in which they act on the SCN and its substructures. Dysregulation of this cycle, whether induced by environmental changes involving irregular exposure to light, or through endogenous pathology, will have a negative impact on immune system optimization and will heighten the deposition of Aβ and the hyperphosphorylation of the tau protein. Given these correlations, it appears that there is a physiologic association between circadian rhythm dysregulation and AD. This review will explore the physiology of circadian dysregulation in the AD brain, and will propose a basic model for its role in AD‐typical pathology, derived from the literature compiled and referenced throughout.
阿尔茨海默病(AD)是痴呆症的主要变体,与一系列危险因素有关,其中许多因素被认为是可以改变的。在这些可改变的危险因素中,昼夜节律是调节睡眠-觉醒周期、食物消耗时间、水合时间和免疫反应以及许多其他必要生理过程的时间生物学系统。视交叉上核(SCN)水平的昼夜节律在人体中受到一系列生物分子物质的严格调节,主要是褪黑激素、皮质醇和血清素。此外,沿传入通路投射到SCN和外周振荡器的光信息调节这些激素的合成,并介导它们作用于SCN及其亚结构的方式。无论这种循环的失调是由环境变化引起的,包括不规律的光照,还是通过内源性病理,都会对免疫系统优化产生负面影响,并会增加a β的沉积和tau蛋白的过度磷酸化。鉴于这些相关性,昼夜节律失调与AD之间似乎存在生理关联。这篇综述将探讨AD大脑中昼夜节律失调的生理学,并提出其在AD典型病理中的作用的基本模型,该模型来源于所有文献的汇编和引用。
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引用次数: 0
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Brain Science Advances
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