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Corrigendum to “Huntingtin lowering impairs the maturation and synchronized synaptic activity of human cortical neuronal networks derived from induced pluripotent stem cells” [Neurobiology of Disease Volume 200 (2024, Oct 1st) - Article# YNBDI_106630] 对 "降低亨廷廷蛋白会损害诱导多能干细胞衍生的人类皮质神经元网络的成熟和同步突触活动 "的更正[《疾病神经生物学》第200卷(2024年10月1日)--文章编号YNBDI_106630]。
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.nbd.2024.106703
Mathilde Louçã , Donya El Akrouti , Aude Lemesle , Morgane Louessard , Noëlle Dufour , Chloé Baroin , Aurore de la Fouchardière , Laurent Cotter , Hélène Jean-Jacques , Virginie Redeker , Anselme L. Perrier
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引用次数: 0
Spatially heterogeneous lipid dysregulation in tuberculous meningitis 结核性脑膜炎的空间异质性脂质失调
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.nbd.2024.106721
John Kim , Ian Spears , Clara Erice , Hye-Young H. Kim , Ned A. Porter , Caitlin Tressler , Elizabeth W. Tucker
Tuberculous (TB) meningitis is the deadliest form of extrapulmonary TB which disproportionately affects children and immunocompromised individuals. Studies in pulmonary TB have shown that Mycobacterium tuberculosis can alter host lipid metabolism to evade the immune system. Cholesterol lowering drugs (i.e., statins) reduce the risk of infection, making them a promising host-directed therapy in pulmonary TB. However, the effect of M. tuberculosis infection on the young or adult brain lipidome has not been studied. The brain is the second-most lipid-rich organ, after adipose tissue, with a temporally and spatially heterogeneous lipidome that changes from infancy to adulthood. The young, developing brain in children may be uniquely vulnerable to alterations in lipid composition and homeostasis, as perturbations in cholesterol metabolism can cause developmental disorders leading to intellectual disabilities. To begin to understand the alterations to the brain lipidome in pediatric TB meningitis, we utilized our previously published young rabbit model of TB meningitis and applied mass spectrometry (MS) techniques to elucidate spatial differences. We used matrix assisted laser desorption/ionization-MS imaging (MALDI-MSI) and complemented it with region-specific liquid chromatography (LC)-MS/MS developed to identify and quantify sterols and oxysterols difficult to identify by MALDI-MSI. MALDI-MSI revealed several sphingolipids, glycerolipids and glycerophospholipids that were downregulated in brain lesions. LC-MS/MS revealed the downregulation of cholesterol, several sterol intermediates along the cholesterol biosynthesis pathway and enzymatically produced oxysterols as a direct result of M. tuberculosis infection. However, oxysterols produced by oxidative stress were increased in brain lesions. Together, these results demonstrate significant spatially regulated brain lipidome dysregulation in pediatric TB meningitis.
结核(TB)性脑膜炎是肺外结核病中最致命的一种,儿童和免疫力低下的人受其影响尤为严重。对肺结核的研究表明,结核分枝杆菌可以改变宿主的脂质代谢,从而躲避免疫系统。降低胆固醇的药物(即他汀类药物)可降低感染风险,因此成为肺结核宿主导向疗法的希望所在。然而,结核杆菌感染对青少年或成年人脑脂质组的影响尚未得到研究。大脑是仅次于脂肪组织的第二大脂质丰富器官,其脂质组在时间和空间上具有异质性,从婴儿期到成年期都会发生变化。由于胆固醇代谢紊乱可导致发育障碍,进而导致智力残疾,因此发育中的儿童大脑可能特别容易受到脂质组成和稳态改变的影响。为了开始了解小儿结核性脑膜炎脑脂质组的改变,我们利用以前发表的结核性脑膜炎幼兔模型,并应用质谱(MS)技术来阐明空间差异。我们使用了基质辅助激光解吸/电离-质谱成像(MALDI-MSI),并辅以区域特异性液相色谱(LC)-MS/MS,以识别和量化 MALDI MSI 难以识别的甾醇和氧基甾醇。MALDI-MSI 发现了在脑损伤中下调的几种鞘脂类、甘油脂类和甘油磷脂类。LC-MS/MS 显示,结核杆菌感染直接导致胆固醇、胆固醇生物合成途径中的几种固醇中间体和酶促产生的氧基甾醇含量下降。然而,氧化应激产生的氧基甾醇在脑损伤中有所增加。总之,这些结果表明,在小儿结核性脑膜炎中,脑脂质组存在明显的空间调控失调。
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引用次数: 0
Increased dopamine D2/D3 receptor and serotonin transporter availability in male rats after spontaneous remission from repeated social defeat-induced depression; a PET study in rats 雄性大鼠从反复社交失败诱发的抑郁中自发缓解后多巴胺 D2/D3 受体和血清素转运体的可用性增加;一项大鼠 PET 研究。
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.nbd.2024.106727
Rodrigo Moraga-Amaro , Daniel Aaron Vazquez-Matias , Luiza Reali Nazario , Rudi A.J.O. Dierckx , Jimmy Stehberg , Janine Doorduin , Erik F.J. de Vries
Most pharmacological treatments for depression target monoamine transporters and about 50 % of treated patients attain symptomatic remission. Once remission is attained, it is hard to distinguish the changes on brain monoaminergic transmission induced by the antidepressants, from those associated to remission per se. In this study, we aimed at studying the brain of spontaneously remitted rats from repeated social defeat (RSD)-induced depression in terms of dopamine D2/D3 receptor and serotonin transporter (SERT) availability, showing absence of depressive symptoms 2 weeks after RSD. We combined behavioral tests and positron emission tomography (PET) with [11C]raclopride and [11C]DASB to explore the changes in dopamine D2/D3 receptor and serotonin transporter (SERT) availability, respectively. Male rats submitted to RSD showed increased peripheral corticosterone levels, decreased body weight and anhedonia, as measured with the sucrose preference test, 1 day after RSD, confirming depressive-like symptoms. These depressive-like symptoms were no longer present 2 weeks after RSD. Rats that recovered from depressive-like symptoms showed decreased D2/D3 receptor binding in the caudate putamen and increased SERT availability in the brainstem, insular cortex, midbrain and thalamus, compared to control non-stressed animals. Our study shows that remission of depressive-like symptoms does not just “normalize” monoaminergic transmission, as changes in dopaminergic and serotonergic neurotransmission linger in several brain regions even after depressive-like symptoms have already resolved. These results provide new insights into the brain changes associated to remission in the RSD-induced depression model in rats.
大多数抑郁症药物治疗都以单胺转运体为靶点,约有 50%的患者在接受治疗后症状会得到缓解。一旦症状得到缓解,就很难区分抗抑郁药引起的大脑单胺类递质的变化和与缓解本身相关的变化。在这项研究中,我们旨在研究自发缓解的重复社交失败(RSD)诱导的抑郁症大鼠大脑中多巴胺 D2/D3 受体和血清素转运体(SERT)的可用性。我们将行为测试和正电子发射断层扫描(PET)与[11C]拉氯必利和[11C]DASB结合起来,分别探讨了多巴胺D2/D3受体和5-羟色胺转运体(SERT)可用性的变化。接受 RSD 的雄性大鼠在 RSD 后 1 天表现出外周皮质酮水平升高、体重下降和失神(用蔗糖偏好试验测量),证实了类似抑郁症状。这些类似抑郁症的症状在 RSD 2 周后已不复存在。与未受刺激的对照组动物相比,抑郁症状恢复的大鼠尾状核丘脑中的D2/D3受体结合减少,脑干、岛叶皮层、中脑和丘脑中的SERT可用性增加。我们的研究表明,抑郁症状的缓解并不仅仅是单胺类传导的 "正常化",即使抑郁症状已经缓解,多巴胺能和血清素能神经传导的变化仍会在多个脑区持续存在。这些结果为研究 RSD 诱导的大鼠抑郁模型中与缓解相关的大脑变化提供了新的视角。
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引用次数: 0
Neonatal hypoxia-ischemia alters the events governing the hippocampal critical period of postnatal synaptic plasticity leading to deficits in working memory in mice 新生儿缺氧缺血会改变海马出生后突触可塑性关键期的事件,导致小鼠工作记忆缺陷。
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-11-01 DOI: 10.1016/j.nbd.2024.106722
Pritika Parmar , Harisa Spahic , Charles Lechner , Mark St. Pierre , Katherine Carlin , Michael Nugent , Raul Chavez-Valdez
Postnatal critical periods of synaptic plasticity (CPsp) are characterized by profound neural network refinement, which is shaped by synaptic activity and sculpted by maturation of the GABAergic network. Even after therapeutic hypothermia (TH), neonatal hypoxia-ischemia (HI) impairs two triggers for the initiation of the CPsp in the hippocampus: i) PSA-NCAM developmental decline and ii) parvalbumin (PV) + interneuron (IN) maturation. Thus, we investigated whether neonatal HI despite TH disturbs other events governing the onset, consolidation and closure of the postnatal CPsp in the hippocampus. We induced cerebral HI in P10 C57BL6 mice with right carotid ligation and 45 m of hypoxia (FiO2 = 0.08), followed by normothermia (36 °C, NT) or TH (31 °C) for 4 h with anesthesia-exposed shams as controls. ELISA, immunoblotting and immunohistochemistry were performed at 24 h (P11), 5 days (P15), 8 days (P18) and 30 days (P40) after HI injury. We specifically assessed: i) BDNF levels and TrkB activation, controlling the CPsp, ii) Otx2 and NPTX2 immunoreactivity (IR), engaging CPsp onset and iii) NogoR1, Lynx1 IR, PNN formation and myelination (MBP) mediating CPsp closure. Pups aged to P40 also received a battery of tests assessing working memory. Here, we documented deficits in hippocampal BDNF levels and TrkB activation at P18 in response to neonatal HI even with TH. Neonatal HI impaired in the CA1 the developmental increase in PV, Otx2, and NPTX2 between P11 and P18, the colocalization of Otx2 and PV at P18 and P40, the accumulation of NPTX2 in PV+ dendrites at P18 and P40, and the expression of NogoR at P40. Furthermore, neonatal HI decreased BDNF and impaired PNN development and myelination (MBP) at P40. Most of these abnormalities were insensitive to TH and correlated with memory deficits. Neonatal HI appears to disrupt many of the molecular and structural events initiating and consolidating the postnatal hippocampal CPsp, perhaps due to the early and delayed deficits in TrkB activation leading to memory deficits.
出生后突触可塑性关键期(CPsp)的特点是神经网络的深度完善,它由突触活动塑造,并由 GABA 能网络的成熟雕刻而成。即使在治疗性低温(TH)之后,新生儿缺氧缺血(HI)也会损害海马中启动 CPsp 的两个触发因素:i)PSA-NCAM 发育衰退和 ii)副发光体(PV)+中间神经元(IN)成熟。因此,我们研究了新生儿HI(尽管有TH)是否会干扰海马出生后CPsp的发生、巩固和关闭的其他事件。我们用右颈动脉结扎和 45 米低氧(FiO2 = 0.08)诱导 P10 C57BL6 小鼠脑 HI,然后进行常温(36 °C,NT)或 TH(31 °C)4 小时,以麻醉暴露的假体作为对照。分别在 HI 损伤后 24 小时(P11)、5 天(P15)、8 天(P18)和 30 天(P40)进行 ELISA、免疫印迹和免疫组织化学检测。我们特别评估了:i)控制 CPsp 的 BDNF 水平和 TrkB 激活;ii)参与 CPsp 发生的 Otx2 和 NPTX2 免疫反应(IR);iii)介导 CPsp 闭合的 NogoR1、Lynx1 IR、PNN 形成和髓鞘化(MBP)。年龄达到 P40 的幼犬还接受了一系列评估工作记忆的测试。在这里,我们记录了海马 BDNF 水平和 TrkB 激活在 P18 时对新生儿 HI(即使有 TH)的反应缺陷。新生儿 HI 影响了 CA1 中 PV、Otx2 和 NPTX2 在 P11 和 P18 之间的发育增加,Otx2 和 PV 在 P18 和 P40 时的共定位,NPTX2 在 P18 和 P40 时在 PV+ 树突中的积累,以及 NogoR 和 Lynx1 在 P40 时的表达。此外,新生儿 HI 会降低 BDNF,并在 P40 时损害 PNN 的发育和髓鞘化(MBP)。这些异常大多对 TH 不敏感,并与记忆缺陷相关。新生儿 HI 似乎破坏了许多启动和巩固出生后海马 CPsp 的分子和结构事件,这可能是由于 TrkB 激活的早期和延迟缺陷导致了记忆缺陷。
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引用次数: 0
Sphingosine 1-phosphate receptor subtype 1 (S1P1) activity in the course of Alzheimer's disease 阿尔茨海默病病程中的 1 型磷酸肾上腺素受体亚型 1 (S1P1) 活性。
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-10-22 DOI: 10.1016/j.nbd.2024.106713
Jonatan Martínez-Gardeazabal , Gorka Pereira-Castelo , Marta Moreno-Rodríguez , Alberto Llorente-Ovejero , Manuel Fernández , Iván Fernández-Vega , Iván Manuel , Rafael Rodríguez-Puertas
Some specific lipid molecules in the brain act as signaling molecules, neurotransmitters, or neuromodulators, by binding to specific G protein-coupled receptors (GPCR) for neurolipids. One such receptor, sphingosine 1-phosphate receptor subtype 1 (S1P1), is coupled to Gi/o proteins and is involved in cell proliferation, growth, and neuroprotection. S1P1 constitutes an interesting target for neurodegenerative diseases like multiple sclerosis and Alzheimer's disease (AD), in which changes in the sphingolipid metabolism have been observed. This study analyzes S1P1 receptor-mediated activity in healthy brains and during AD progression using postmortem samples from controls and patients at different Braak's stages. Additionally, the distribution of S1P1 receptor activity in human brains is compared to that in commonly used rodent models, rats and mice, through functional autoradiography, measuring [35S]GTPγS binding stimulated by the S1P1 receptor selective agonist CYM-5442 to obtain the distribution of functional activity of S1P1 receptors.
S1P1 receptor-mediated activity, along with that of the cannabinoid CB1 receptor, is one of the highest recorded for any GPCR in many gray matter areas of the brain, reaching maximum values in the cerebellar cortex, specific areas of the hippocampus and the basal forebrain. S1P1 signaling is crucial in areas that regulate learning, memory, motor control, and nociception, such as the basal forebrain and basal ganglia. In AD, S1P1 receptor activity is increased in the inner layers of the frontal cortex and underlying cortical white matter at early stages, but decreases in the hippocampus in advanced stages, indicating ongoing brain impairment. Importantly, we identified significant correlations between S1P1 receptor activity and Braak stages, suggesting that S1P1 receptor dysfunction is associated to disease progression, particularly in memory-related regions. The S1P signaling via S1P1 receptor is a promising neurological target due to its role in key neurophysiological functions and its potential to modify the progression of neurodegenerative diseases. Finally, rats are suggested as a preferred experimental model for studying S1P1 receptor-mediated responses in the human brain.
大脑中的一些特定脂质分子通过与神经脂质的特定 G 蛋白偶联受体(GPCR)结合,成为信号分子、神经递质或神经调节剂。其中一种受体是 1-磷酸鞘氨醇受体亚型 1(S1P1),它与 Gi/o 蛋白偶联,参与细胞增殖、生长和神经保护。S1P1 是多发性硬化症和阿尔茨海默病(AD)等神经退行性疾病的一个有趣靶点,在这些疾病中已观察到鞘脂代谢的变化。本研究利用对照组和处于不同布拉克分期的患者的尸检样本,分析了健康大脑和阿尔茨海默病进展过程中 S1P1 受体介导的活性。此外,通过功能性自显影,测量 S1P1 受体选择性激动剂 CYM-5442 刺激的 [35S]GTPγS 结合,将人脑中 S1P1 受体活性的分布与常用啮齿类动物模型(大鼠和小鼠)中的分布进行比较,从而获得 S1P1 受体功能活性的分布。S1P1 受体介导的活性与大麻素 CB1 受体的活性一样,是大脑许多灰质区域记录到的任何 GPCR 活性最高的之一,在小脑皮层、海马特定区域和前脑基底达到最高值。S1P1 信号在调节学习、记忆、运动控制和痛觉的区域(如基底前脑和基底神经节)至关重要。在注意力缺失症的早期阶段,额叶皮层内层和皮层下层白质中的S1P1受体活性会增加,但在晚期阶段,海马中的S1P1受体活性会降低,这表明大脑功能正在受损。重要的是,我们发现 S1P1 受体活性与 Braak 分期之间存在显著相关性,这表明 S1P1 受体功能障碍与疾病进展有关,尤其是在记忆相关区域。由于 S1P1 受体在关键神经生理功能中的作用及其改变神经退行性疾病进展的潜力,通过 S1P1 受体发出的 S1P 信号是一个很有前景的神经学靶点。最后,大鼠被认为是研究人脑中 S1P1 受体介导的反应的首选实验模型。
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引用次数: 0
Senolytic therapy preserves blood-brain barrier integrity and promotes microglia homeostasis in a tauopathy model 衰老疗法可在牛磺酸病模型中保护血脑屏障的完整性并促进小胶质细胞的稳态。
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-10-21 DOI: 10.1016/j.nbd.2024.106711
Minmin Yao , Zhiliang Wei , Jonathan Scharff Nielsen , Yuxiao Ouyang , Aaron Kakazu , Haitong Wang , Lida Du , Ruoxuan Li , Tiffany Chu , Susanna Scafidi , Hanzhang Lu , Manisha Aggarwal , Wenzhen Duan
Cellular senescence, characterized by expressing the cell cycle inhibitory proteins, is evident in driving age-related diseases. Senescent cells play a crucial role in the initiation and progression of tau-mediated pathology, suggesting that targeting cell senescence offers a therapeutic potential for treating tauopathy associated diseases. This study focuses on identifying non-invasive biomarkers and validating their responses to a well-characterized senolytic therapy combining dasatinib and quercetin (D + Q), in a widely used tauopathy mouse model, PS19. We employed human-translatable MRI measures, including water extraction with phase-contrast arterial spin tagging (WEPCAST) MRI, T2 relaxation under spin tagging (TRUST), longitudinally assessed brain physiology and high-resolution structural MRI evaluated the brain regional volumes in PS19 mice. Our data reveal increased BBB permeability, decreased oxygen extraction fraction, and brain atrophy in 9-month-old PS19 mice compared to their littermate controls. (D + Q) treatment effectively preserves BBB integrity, rescues cerebral oxygen hypometabolism, attenuates brain atrophy, and alleviates tau hyperphosphorylation in PS19 mice. Mechanistically, D + Q treatment induces a shift of microglia from a disease-associated to a homeostatic state, reducing a senescence-like microglial phenotype marked by increased p16/Ink4a. D + Q-treated PS19 mice exhibit enhanced cue-associated cognitive performance in the tracing fear conditioning test compared to the vehicle-treated littermates, implying improved cognitive function by D + Q treatment. Our results pave the way for application of senolytic treatment as well as these noninvasive MRI biomarkers in clinical trials in tauopathy associated neurological disorders.
细胞衰老以表达细胞周期抑制蛋白为特征,在与年龄相关的疾病中表现明显。衰老细胞在 tau 介导的病理学的发生和发展过程中起着至关重要的作用,这表明针对细胞衰老可为治疗与 tau 蛋白病相关的疾病提供治疗潜力。本研究的重点是在广泛使用的tauopathy小鼠模型PS19中鉴定非侵入性生物标志物,并验证它们对结合达沙替尼和槲皮素(D+Q)的特征明显的衰老疗法的反应。我们采用了人类可翻译的磁共振成像测量方法,包括水提取与相位对比动脉自旋标记(WEPCAST)磁共振成像、自旋标记下的T2弛豫(TRUST)、纵向评估脑生理学以及高分辨率结构磁共振成像评估PS19小鼠的脑区域体积。我们的数据显示,与同窝对照组相比,9 个月大的 PS19 小鼠的 BBB 通透性增加、氧萃取率降低、脑萎缩。(D + Q)治疗可有效保护 PS19 小鼠的 BBB 完整性、挽救脑氧代谢低下、减轻脑萎缩并缓解 tau 过度磷酸化。从机理上讲,D + Q 治疗诱导小胶质细胞从疾病相关状态转变为平衡状态,减少了以 p16/Ink4a 增加为特征的衰老样小胶质细胞表型。在追踪恐惧条件反射测试中,经 D + Q 处理的 PS19 小鼠与经车辆处理的同窝小鼠相比,表现出更强的线索相关认知能力,这意味着经 D + Q 处理的小鼠的认知功能得到了改善。我们的研究结果为在与tauopathy相关的神经系统疾病的临床试验中应用衰老治疗以及这些非侵入性磁共振成像生物标志物铺平了道路。
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引用次数: 0
Nigrostriatal tract defects in mice with aromatic l-amino acid decarboxylase deficiency 芳香族 l-氨基酸脱羧酶缺乏症小鼠的黑质纹状体束缺陷
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-10-19 DOI: 10.1016/j.nbd.2024.106707
Ni-Chung Lee , Pei-Chun Hsu , Yu-Han Liu , Hao-Chun Wang , Tsu-I Chen , Yin-Hsiu Chien , Wuh-Liang Hwu
The development of the nigrostriatal dopaminergic (DA) pathway in the brain involves many transcriptional and chemotactic molecules, and a deficiency of these molecules can cause nigrostriatal tract defects. However, the role of the end product, dopamine, in nigrostriatal pathway development has not been described. In the present study, we analyzed a mouse model of congenital dopamine and serotonin deficiency, namely, the aromatic l-amino acid decarboxylase (AADC) deficiency (DdcKI) mouse model. We found via tyrosine hydroxylase (TH) immunofluorescence staining that the number of DA fibers in the stratum of 14-day-old DdcKI mice decreased. In TH-stained cleared whole brains of DdcKI mice, the numbers of DA neurons in the substantia nigra (SN) and the number of DA nerve bundles leaving the SN were both normal. However, we found that the nigrostriatal bundles in DdcKI mice were dispersed, taking aberrant routes to the striatum and spreading over a wide area. The total volume occupied by the nigrostriatal tract was increased, and the fraction of TH staining in the tract was decreased in DdcKI mice. Single-nucleus RNA sequencing analysis for mice 0, 7, and 14 days of age, revealed delayed axonogenesis and synapse formation in the striatum of DdcKI mice. The CellChat program inferred less cell–cell communication between striatal D1/D2 neurons but increased cell–cell communication involving neural precursors in DdcKI mice. Therefore, a congenital deficiency in dopamine affects nigrostriatal axon extension and striatal innervation. These nigrostriatal tract defects may limit the treatment efficacy for patients with TH or AADC deficiency.
大脑黑质多巴胺能(DA)通路的发育涉及许多转录和趋化分子,缺乏这些分子会导致黑质通路缺陷。然而,最终产物多巴胺在黑质通路发育中的作用尚未得到描述。在本研究中,我们分析了一种先天性多巴胺和血清素缺乏的小鼠模型,即芳香族 l-氨基酸脱羧酶(AADC)缺乏(DdcKI)小鼠模型。我们通过酪氨酸羟化酶(TH)免疫荧光染色发现,14天大的DdcKI小鼠地层中的DA纤维数量减少。在TH染色清除的DdcKI小鼠全脑中,黑质(SN)中的DA神经元数量和离开SN的DA神经束数量均正常。但我们发现,DdcKI 小鼠的黑质神经束分散,其通往纹状体的路线异常,分布范围很广。在 DdcKI 小鼠中,黑质束所占的总体积增加了,而黑质束中 TH 染色的比例降低了。对 0、7 和 14 日龄小鼠进行的单核 RNA 测序分析表明,DdcKI 小鼠纹状体的轴突生成和突触形成延迟。CellChat程序推断,DdcKI小鼠纹状体D1/D2神经元之间的细胞-细胞通讯减少,但涉及神经前体的细胞-细胞通讯增加。因此,先天性多巴胺缺乏会影响黑质轴突的延伸和纹状体的神经支配。这些黑质束缺陷可能会限制对TH或AADC缺乏症患者的治疗效果。
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引用次数: 0
A timeline study on vascular co-morbidity induced cerebral endothelial dysfunction assessed by perfusion MRI 通过灌注磁共振成像评估血管并发症诱发的脑内皮功能障碍的时间线研究。
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-10-19 DOI: 10.1016/j.nbd.2024.106709
Bram Callewaert , Willy Gsell , Marleen Lox , Uwe Himmelreich , Elizabeth A.V. Jones
Endothelial dysfunction is considered a key element in the early pathogenesis of neurodegenerative disorders. Dysfunction of the cerebral endothelial cells can result in dysregulation of cerebral perfusion and disruption of the Blood Brain Barrier (BBB), leading to brain damage, neurodegeneration and cognitive decline. It has been shown that the presence of modifiable risk factors exacerbates endothelial dysfunction. This study primarily aimed to identify which among various perfusion MRI methodologies could be effectively utilized to non-invasively identify early pathological alterations as a result of endothelial dysfunction. We compared these perfusion MRI measurements to invasive immunohistochemistry to detect early pathological alterations in the cerebral vasculature of a rat model of multiple cardiovascular co-morbidities (the ZSF1 Obese rat) at several stages of the cerebrovascular pathology. We observed cerebral hyperperfusion, expressed by increased Cerebral Blood Flow (CBF) and increased BBB permeability in the ZSF1 Obese rats, at an early stage of disease development. The increase in CBF observed with Arterial Spin Labeling (ASL) was lost during later stages of disease progression. These findings are in line with recent clinical findings in early stages of Alzheimer's disease (AD), that also show early increases in CBF.
内皮功能障碍被认为是神经退行性疾病早期发病机制中的一个关键因素。脑内皮细胞功能障碍可导致脑灌注失调和血脑屏障(BBB)破坏,从而导致脑损伤、神经变性和认知能力下降。研究表明,可改变的风险因素会加剧内皮功能障碍。本研究的主要目的是确定在各种灌注 MRI 方法中,哪种方法可有效用于无创识别内皮功能障碍导致的早期病理改变。我们将这些灌注 MRI 测量结果与有创免疫组化方法进行了比较,以检测多种心血管并发症大鼠模型(ZSF1 肥胖大鼠)在脑血管病变的几个阶段中脑血管的早期病理改变。我们观察到,在 ZSF1 肥胖大鼠疾病发展的早期阶段,其脑血流(CBF)增加和 BBB 通透性增加表现为脑过度灌注。在疾病发展的后期阶段,动脉自旋标记(ASL)观察到的 CBF 增加消失了。这些发现与阿尔茨海默病(AD)早期阶段的最新临床发现一致,后者也显示出早期 CBF 的增加。
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引用次数: 0
Multiomics approach discloses lipids and metabolites profiles associated to Parkinson's disease stages and applied therapies 多组学方法揭示了与帕金森病阶段和应用疗法相关的脂质和代谢物特征。
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-10-18 DOI: 10.1016/j.nbd.2024.106698
Federica Carrillo , Nicole Piera Palomba , Marco Ghirimoldi , Camilla Didò , Giorgio Fortunato , Shahzaib Khoso , Tiziana Giloni , Marco Santilli , Tommaso Bocci , Alberto Priori , Sara Pietracupa , Nicola Modugno , Elettra Barberis , Marcello Manfredi , Paola Signorelli , Teresa Esposito
Profiling circulating lipids and metabolites in Parkinson's disease (PD) patients could be useful not only to highlight new pathways affected in PD condition but also to identify sensitive and effective biomarkers for early disease detection and potentially effective therapeutic interventions. In this study we adopted an untargeted omics approach in three groups of patients (No L-Dopa, L-Dopa and DBS) to disclose whether long-term levodopa treatment with or without deep brain stimulation (DBS) could reflect a characteristic lipidomic and metabolomic signature at circulating level. Our findings disclosed a wide up regulation of the majority of differentially regulated lipid species that increase with disease progression and severity. We found a relevant modulation of triacylglycerols and acyl-carnitines, together with an altered profile in adiponectin and leptin, that can differentiate the DBS treated group from the others PD patients. We found a highly significant increase of exosyl ceramides (Hex2Cer) and sphingoid bases (SPB) in PD patients mainly in DBS group (p < 0.0001), which also resulted in a highly accurate diagnostic performance. At metabolomic level, we found a wide dysregulation of pathways involved in the biosynthesis and metabolism of several amino acids. The most interesting finding was the identification of a specific modulation of L-glutamic acid in the three groups of patients. L-glutamate levels increased slightly in No L-Dopa and highly in L-Dopa patients while decreased in DBS, suggesting that DBS therapy might have a beneficial effect on the glutamatergic cascade. All together, these data provide novel insights into the molecular and metabolic alterations underlying PD therapy and might be relevant for PD prediction, diagnosis and treatment.
分析帕金森病(PD)患者的循环脂质和代谢物不仅有助于突出帕金森病病情中受影响的新通路,还有助于确定敏感而有效的生物标记物,以用于早期疾病检测和潜在的有效治疗干预。在这项研究中,我们在三组患者(无左旋多巴、左旋多巴和脑深部刺激(DBS))中采用了一种非靶向 omics 方法,以揭示有或无脑深部刺激(DBS)的左旋多巴长期治疗是否能在循环水平上反映出一种特征性的脂质体和代谢组特征。我们的研究结果表明,随着疾病的发展和严重程度的增加,大多数受不同调控的脂质种类都出现了广泛的上调。我们发现三酰甘油和酰基肉碱发生了相关的调节,同时脂肪连素和瘦素也发生了改变,这可以将 DBS 治疗组与其他帕金森病患者区分开来。我们发现,外源性神经酰胺(Hex2Cer)和鞘氨醇基(SPB)在以 DBS 治疗组为主的帕金森病患者中出现了非常明显的增加(p<0.05)。
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引用次数: 0
Special issue on “A focus on brain–body communication in understanding the neurobiology of diseases” 特刊 "关注脑体交流,了解疾病的神经生物学"
IF 5.1 2区 医学 Q1 NEUROSCIENCES Pub Date : 2024-10-15 DOI: 10.1016/j.nbd.2024.106666
Kenji Hashimoto , Yan Wei , Chun Yang
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引用次数: 0
期刊
Neurobiology of Disease
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