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Dissociable dorsal medial prefrontal cortex ensembles are necessary for cocaine seeking and fear conditioning in mice. 可分离的背内侧前额叶皮层集合是小鼠寻求可卡因和恐惧条件反射的必要条件。
IF 5.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-23 DOI: 10.1038/s41398-024-03068-7
Shuai Liu, Natalie Nawarawong, Xiaojie Liu, Qing-Song Liu, Christopher M Olsen

The dorsal medial prefrontal cortex (dmPFC) plays a dual role in modulating drug seeking and fear-related behaviors. Learned associations between cues and drug seeking are encoded by a specific ensemble of neurons. This study explored the stability of a dmPFC cocaine seeking ensemble over 2 weeks and its influence on persistent cocaine seeking and fear memory retrieval. In the first series of experiments, we trained TetTag c-fos-driven-EGFP mice in cocaine self-administration and tagged strongly activated neurons with EGFP during the initial day 7 cocaine seeking session. Subsequently, a follow-up seeking test was conducted 2 weeks later to examine ensemble reactivation between two seeking sessions via c-Fos immunostaining. In the second series of experiments, we co-injected viruses expressing TRE-cre and a cre-dependent inhibitory PSAM-GlyR into the dmPFC of male and female c-fos-tTA mice to enable "tagging" of cocaine seeking ensemble or cued fear ensemble neurons with inhibitory chemogenetic receptors. These c-fos-tTA mice have the c-fos promoter that drives expression of the tetracycline transactivator (tTA). The tTA can bind to the tetracycline response element (TRE) site on the viral construct, resulting in the expression of cre-recombinase, which enables the expression of cre-dependent inhibitory chemogenetic receptors and fluorescent reporters. Then we investigated ensemble contribution to subsequent cocaine seeking and fear recall during inhibition of the tagged ensemble by administering uPSEM792s (0.3 mg/kg), a selective ligand for PSAM-GlyR. In both sexes, there was a positive association between the persistence of cocaine seeking and the proportion of reactivated EGFP+ neurons within the dmPFC. More importantly, inhibition of the cocaine seeking ensemble suppressed cocaine seeking, but not recall of fear memory, while inhibition of the fear ensemble reduced conditioned freezing but not cocaine seeking. The results demonstrate that cocaine and fear recall ensembles in the dmPFC are stable, but largely exclusive from one another.

背内侧前额叶皮层(dmPFC)在调节药物寻求和恐惧相关行为方面扮演着双重角色。线索与寻求毒品之间的学习关联由特定的神经元组合编码。本研究探讨了大脑前部皮层可卡因寻求神经元群在两周内的稳定性及其对持续性可卡因寻求和恐惧记忆检索的影响。在第一组实验中,我们对 TetTag c-fos 驱动的 EGFP 小鼠进行了可卡因自我给药训练,并在最初的第 7 天可卡因寻求训练中用 EGFP 标记强激活的神经元。随后,在2周后进行了一次后续寻找测试,通过c-Fos免疫染色检查两次寻找过程之间的神经元集合再激活情况。在第二系列实验中,我们向雌雄c-fos-tTA小鼠的dmPFC中联合注射了表达TRE-cre和cre依赖性抑制性PSAM-GlyR的病毒,以便用抑制性化学受体 "标记 "可卡因寻求集合或提示恐惧集合神经元。这些c-fos-tTA小鼠的c-fos启动子可驱动四环素转录因子(tTA)的表达。tTA能与病毒构建体上的四环素反应元件(TRE)位点结合,导致cre-重组酶的表达,从而实现依赖cre的抑制性化学基因受体和荧光报告物的表达。然后,我们通过给PSAM-GlyR的选择性配体uPSEM792s(0.3 mg/kg),研究了在抑制标记的集合过程中,集合对随后的可卡因寻求和恐惧回忆的贡献。在两种性别中,可卡因寻求的持续性与dmPFC中重新激活的EGFP+神经元的比例呈正相关。更重要的是,抑制可卡因寻求神经元群可以抑制可卡因寻求,但不能抑制恐惧记忆的回忆,而抑制恐惧神经元群可以减少条件冻结,但不能抑制可卡因寻求。这些结果表明,dmPFC中的可卡因和恐惧回忆集合是稳定的,但在很大程度上是相互排斥的。
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引用次数: 0
Beyond the usual suspects: multi-factorial computational models in the search for neurodegenerative disease mechanisms. 超越常规:寻找神经退行性疾病机制的多因素计算模型。
IF 5.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-23 DOI: 10.1038/s41398-024-03073-w
Ahmed Faraz Khan, Yasser Iturria-Medina

From Alzheimer's disease to amyotrophic lateral sclerosis, the molecular cascades underlying neurodegenerative disorders remain poorly understood. The clinical view of neurodegeneration is confounded by symptomatic heterogeneity and mixed pathology in almost every patient. While the underlying physiological alterations originate, proliferate, and propagate potentially decades before symptomatic onset, the complexity and inaccessibility of the living brain limit direct observation over a patient's lifespan. Consequently, there is a critical need for robust computational methods to support the search for causal mechanisms of neurodegeneration by distinguishing pathogenic processes from consequential alterations, and inter-individual variability from intra-individual progression. Recently, promising advances have been made by data-driven spatiotemporal modeling of the brain, based on in vivo neuroimaging and biospecimen markers. These methods include disease progression models comparing the temporal evolution of various biomarkers, causal models linking interacting biological processes, network propagation models reproducing the spatial spreading of pathology, and biophysical models spanning cellular- to network-scale phenomena. In this review, we discuss various computational approaches for integrating cross-sectional, longitudinal, and multi-modal data, primarily from large observational neuroimaging studies, to understand (i) the temporal ordering of physiological alterations, i(i) their spatial relationships to the brain's molecular and cellular architecture, (iii) mechanistic interactions between biological processes, and (iv) the macroscopic effects of microscopic factors. We consider the extents to which computational models can evaluate mechanistic hypotheses, explore applications such as improving treatment selection, and discuss how model-informed insights can lay the groundwork for a pathobiological redefinition of neurodegenerative disorders.

从阿尔茨海默病到肌萎缩侧索硬化症,人们对神经退行性疾病的分子级联仍然知之甚少。神经退行性疾病的临床表现几乎与每位患者的症状异质性和混合病理学相混淆。虽然潜在的生理改变可能在症状出现前几十年就已经开始、扩散和传播,但活体大脑的复杂性和不可接近性限制了对患者整个生命周期的直接观察。因此,亟需强有力的计算方法,通过区分致病过程和后果性改变,以及个体间变异和个体内进展,来支持神经退行性变因果机制的研究。最近,基于活体神经成像和生物样本标记的数据驱动型大脑时空建模取得了令人鼓舞的进展。这些方法包括比较各种生物标志物时间演变的疾病进展模型、连接相互作用的生物过程的因果模型、再现病理空间扩散的网络传播模型,以及涵盖细胞到网络规模现象的生物物理模型。在这篇综述中,我们讨论了整合横断面、纵向和多模态数据(主要来自大型神经影像观察研究)的各种计算方法,以了解(i) 生理改变的时间顺序,(i) 它们与大脑分子和细胞结构的空间关系,(iii) 生物过程之间的机理相互作用,以及 (iv) 微观因素的宏观效应。我们考虑了计算模型在多大程度上可以评估机理假设,探讨了改进治疗选择等应用,并讨论了以模型为基础的见解如何为神经退行性疾病的病理生物学重新定义奠定基础。
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引用次数: 0
Making bloodwork work: the impact of sample collection, processing, and storage on plasma glutathione measurement, and implications for translation. 让血液工作发挥作用:样本采集、处理和储存对血浆谷胱甘肽测量的影响以及转化的意义。
IF 5.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-23 DOI: 10.1038/s41398-024-03086-5
Kendall M Coden, Duyen K K Nguyen, Roberta Moorhead, Beatriz E Stix-Brunell, Joanna N Baker, Karen J Parker, Joseph P Garner

Psychiatry has traditionally focused on the study of neurons and neurotransmitter physiology in the pathophysiology and treatment of psychiatric disorders. A growing literature highlights REDOX imbalance (a state in which demand for antioxidants surpasses their bioavailability) as a common pathophysiology for a diverse array of brain conditions (e.g., trichotillomania, schizophrenia, autism, Parkinson's disease). REDOX imbalance is typically measured via plasma glutathione, as glutathione is critical to the adaptive antioxidant response in the brain. Accordingly, glutathione, its precursors, and/or metabolites serve as biomarkers of disease risk, therapeutic targets, and measures of treatment response. However, as with any emerging field, there are currently several different methods for collection, processing, storage, and calculation of summary measures of plasma glutathione metabolism, within and between preclinical and clinical research. The lack of evidence-based best-practice methodology hampers reproducibility (preclinical or clinical), and translation (between preclinical and clinical work). To address this methodological need, here we used a repeated measures within-subject design to investigate how sample preparation (type of anticoagulant used during blood collection, deproteinization status, and storage temperature) affects plasma glutathione levels. Accordingly, we collected whole blood from mice (N = 13), and then, using a commercially available kit, quantified glutathione in plasma stored in four different ways. Presuming that these preparation conditions and post-processing calculations are unimportant, we would expect to see no difference in glutathione levels and summary measures from the same sample. However, we found each of these variables to significantly alter quantified glutathione levels. Accordingly, we propose a vital, gold-standard methodology for both sample collection, processing, and storage of plasma used for glutathione quantification and for summary calculations of glutathione that can be used preclinically and clinically, thus yielding more streamlined translation.

精神病学历来侧重于研究神经元和神经递质在精神疾病的病理生理学和治疗中的生理作用。越来越多的文献强调 REDOX 失衡(一种对抗氧化剂的需求超过其生物利用率的状态)是各种脑部疾病(如毛滴虫症、精神分裂症、自闭症、帕金森病)的常见病理生理学。由于谷胱甘肽对大脑的适应性抗氧化反应至关重要,因此通常通过血浆谷胱甘肽来测量氧化还原失衡。因此,谷胱甘肽、其前体和/或代谢物可作为疾病风险的生物标志物、治疗目标和治疗反应的测量指标。然而,与任何新兴领域一样,目前在临床前研究和临床研究内部以及之间,有几种不同的方法用于收集、处理、储存和计算血浆谷胱甘肽代谢的简要测量值。缺乏以证据为基础的最佳实践方法阻碍了可重复性(临床前或临床)和转化(临床前和临床工作之间)。为了满足这一方法学需求,我们在此采用受试者内重复测量设计来研究样本制备(采血时使用的抗凝剂类型、去蛋白状态和储存温度)如何影响血浆谷胱甘肽水平。因此,我们采集了小鼠(N = 13)的全血,然后使用市售试剂盒对以四种不同方式储存的血浆中的谷胱甘肽进行了定量。假设这些制备条件和后处理计算并不重要,我们预计同一样本的谷胱甘肽水平和摘要测量结果不会有差异。然而,我们发现这些变量都会显著改变谷胱甘肽的量化水平。因此,我们为用于谷胱甘肽定量的血浆样本收集、处理和储存以及谷胱甘肽的汇总计算提出了一种重要的黄金标准方法,该方法可用于临床前和临床,从而实现更简便的转化。
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引用次数: 0
Evaluating the association between placenta DNA methylation and cognitive functions in the offspring. 评估胎盘 DNA 甲基化与后代认知功能之间的关联。
IF 5.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-20 DOI: 10.1038/s41398-024-03094-5
Laia Diez-Ahijado, Ariadna Cilleros-Portet, Nora Fernández-Jimenez, Mariana F Fernández, Monica Guxens, Jordi Julvez, Sabrina Llop, Maria-Jose Lopez-Espinosa, Mikel Subiza-Pérez, Manuel Lozano, Jesus Ibarluzea, Jordi Sunyer, Mariona Bustamante, Marta Cosin-Tomas

The placenta plays a crucial role in protecting the fetus from environmental harm and supports the development of its brain. In fact, compromised placental function could predispose an individual to neurodevelopmental disorders. Placental epigenetic modifications, including DNA methylation, could be considered a proxy of placental function and thus plausible mediators of the association between intrauterine environmental exposures and genetics, and childhood and adult mental health. Although neurodevelopmental disorders such as autism spectrum disorder have been investigated in relation to placenta DNA methylation, no studies have addressed the association between placenta DNA methylation and child's cognitive functions. Thus, our goal here was to investigate whether the placental DNA methylation profile measured using the Illumina EPIC array is associated with three different cognitive domains (namely verbal score, perceptive performance score, and general cognitive score) assessed by the McCarthy Scales of Children's functions in childhood at age 4. To this end, we conducted epigenome-wide association analyses, including data from 255 mother-child pairs within the INMA project, and performed a follow-up functional analysis to help the interpretation of the findings. After multiple-testing correction, we found that methylation at 4 CpGs (cg1548200, cg02986379, cg00866476, and cg14113931) was significantly associated with the general cognitive score, and 2 distinct differentially methylated regions (DMRs) (including 27 CpGs) were significantly associated with each cognitive dimension. Interestingly, the genes annotated to these CpGs, such as DAB2, CEP76, PSMG2, or MECOM, are involved in placenta, fetal, and brain development. Moreover, functional enrichment analyses of suggestive CpGs (p < 1 × 10-4) revealed gene sets involved in placenta development, fetus formation, and brain growth. These findings suggest that placental DNA methylation could be a mechanism contributing to the alteration of important pathways in the placenta that have a consequence on the offspring's brain development and cognitive function.

胎盘在保护胎儿免受环境伤害和支持胎儿大脑发育方面起着至关重要的作用。事实上,胎盘功能受损会导致神经发育障碍。胎盘的表观遗传修饰(包括 DNA 甲基化)可被视为胎盘功能的替代物,因此是宫内环境暴露和遗传与儿童和成人精神健康之间联系的合理中介。虽然已经研究了自闭症谱系障碍等神经发育疾病与胎盘 DNA 甲基化的关系,但还没有研究涉及胎盘 DNA 甲基化与儿童认知功能之间的关系。因此,我们的目标是研究使用Illumina EPIC阵列测量的胎盘DNA甲基化特征是否与麦卡锡儿童功能量表(McCarthy Scales of Children's functions)评估的4岁儿童的三个不同认知领域(即言语得分、感知表现得分和一般认知得分)相关。为此,我们进行了全表观基因组关联分析,包括 INMA 项目中 255 对母子的数据,并进行了后续功能分析,以帮助解释研究结果。经过多重检验校正后,我们发现4个CpGs(cg1548200、cg02986379、cg00866476和cg14113931)的甲基化与一般认知评分显著相关,2个不同的甲基化区域(DMRs)(包括27个CpGs)与每个认知维度显著相关。有趣的是,这些CpGs注释的基因,如DAB2、CEP76、PSMG2或MECOM,都参与了胎盘、胎儿和大脑的发育。此外,对提示性 CpGs(p-4)的功能富集分析显示,基因组涉及胎盘发育、胎儿形成和大脑生长。这些研究结果表明,胎盘 DNA 甲基化可能是导致胎盘重要通路改变的一种机制,对后代的大脑发育和认知功能有影响。
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引用次数: 0
Neural correlates of harm avoidance: a multimodal meta-analysis of brain structural and resting-state functional neuroimaging studies. 避免伤害的神经相关性:大脑结构和静息状态功能神经成像研究的多模式荟萃分析。
IF 5.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-20 DOI: 10.1038/s41398-024-03091-8
Shitong Zhong, Jinping Lin, Lingsheng Zhang, Song Wang, Graham J Kemp, Lei Li, Qiyong Gong

Harm avoidance (HA) is a Cloninger personality trait that describes behavioural inhibition to avoid aversive stimuli. It serves as a predisposing factor that contributes to the development of mental disorders such as anxiety and major depressive disorder. Neuroimaging research has identified some brain anatomical and functional correlates of HA, but reported findings are inconsistent. We therefore conducted a multimodal meta-analysis of whole-brain structural and resting-state functional neuroimaging studies to identify the most stable neural substrate of HA. Included were a total of 10 structural voxel-based morphometry studies (11 datasets) and 13 functional positron emission tomography or single photon emission computed tomography studies (16 datasets) involving 3053 healthy participants without any psychiatric or neurological disorders evaluated for HA using the Three-Dimensional Personality Questionnaire (TPQ) or the Temperament and Character Inventory (TCI). The meta-analysis revealed brain volumetric correlates of HA in parietal and temporal cortices, and resting-state functional correlates in prefrontal, temporal and parietal gray matter. Volumetric and functional correlates co-occurred in the left superior frontal gyrus and left middle frontal gyrus, and were dissociated in the left rectus gyrus. Our meta-analysis is the first study to give a comprehensive picture of the structural and functional correlates of HA, a contribution that may help bridge the grievous gap between the neurobiology of HA and the pathogenesis, prevention and treatment of HA-related mental disorders.

危害回避(HA)是克隆宁格人格特质的一种,描述了避免厌恶刺激的行为抑制。它是导致焦虑症和重度抑郁症等精神疾病的易感因素。神经影像学研究发现了 HA 在大脑解剖学和功能上的一些相关因素,但报告的结果并不一致。因此,我们对全脑结构和静息状态功能神经影像学研究进行了多模态荟萃分析,以确定 HA 最稳定的神经基质。共纳入了 10 项结构体素形态计量学研究(11 个数据集)和 13 项功能正电子发射计算机断层扫描或单光子发射计算机断层扫描研究(16 个数据集),涉及 3053 名没有任何精神或神经疾病的健康参与者,他们均使用三维人格问卷(TPQ)或气质与性格量表(TCI)对 HA 进行了评估。荟萃分析显示了顶叶和颞叶皮层中 HA 的脑容量相关性,以及前额叶、颞叶和顶叶灰质中的静息态功能相关性。在左侧额上回和左侧额中回,体积相关性和功能相关性同时存在,而在左侧直回则不存在。我们的荟萃分析是第一项全面描述 HA 结构和功能相关性的研究,它有助于弥合 HA 神经生物学与 HA 相关精神障碍的发病机制、预防和治疗之间的巨大差距。
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引用次数: 0
Disrupted basolateral amygdala circuits supports negative valence bias in depressive states. 杏仁核基底外侧回路的破坏支持抑郁状态下的负价值偏向。
IF 5.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-19 DOI: 10.1038/s41398-024-03085-6
Mathilde Bigot, Claire-Hélène De Badts, Axel Benchetrit, Éléonore Vicq, Carine Moigneu, Manon Meyrel, Sébastien Wagner, Alexandru Adrian Hennrich, Josselin Houenou, Pierre-Marie Lledo, Chantal Henry, Mariana Alonso

Negative bias is an essential characteristic of depressive episodes leading patients to attribute more negative valence to environmental cues. This negative bias affects all levels of information processing including emotional response, attention and memory, leading to the development and maintenance of depressive symptoms. In this context, pleasant stimuli become less attractive and unpleasant ones more aversive, yet the related neural circuits underlying this bias remain largely unknown. By studying a mice model for depression chronically receiving corticosterone (CORT), we showed a negative bias in valence attribution to olfactory stimuli that responds to antidepressant drug. This result paralleled the alterations in odor value assignment we observed in bipolar depressed patients. Given the crucial role of amygdala in valence coding and its strong link with depression, we hypothesized that basolateral amygdala (BLA) circuits alterations might support negative shift associated with depressive states. Contrary to humans, where limits in spatial resolution of imaging tools impair easy amygdala segmentation, recently unravelled specific BLA circuits implicated in negative and positive valence attribution could be studied in mice. Combining CTB and rabies-based tracing with ex vivo measurements of neuronal activity, we demonstrated that negative valence bias is supported by disrupted activity of specific BLA circuits during depressive states. Chronic CORT administration induced decreased recruitment of BLA-to-NAc neurons preferentially involved in positive valence encoding, while increasing recruitment of BLA-to-CeA neurons preferentially involved in negative valence encoding. Importantly, this dysfunction was dampened by chemogenetic hyperactivation of BLA-to-NAc neurons. Moreover, altered BLA activity correlated with durable presynaptic connectivity changes coming from the paraventricular nucleus of the thalamus, recently demonstrated as orchestrating valence assignment in the amygdala. Together, our findings suggest that specific BLA circuits alterations might support negative bias in depressive states and provide new avenues for translational research to understand the mechanisms underlying depression and treatment efficacy.

消极偏差是抑郁发作的一个基本特征,它导致患者对环境线索赋予更多的消极价值。这种负面偏差会影响包括情绪反应、注意力和记忆力在内的所有信息处理水平,从而导致抑郁症状的发展和维持。在这种情况下,令人愉快的刺激变得不那么有吸引力,而令人不愉快的刺激则更具厌恶性,但这种偏差背后的相关神经回路在很大程度上仍不为人所知。通过研究长期服用皮质酮(CORT)的抑郁症小鼠模型,我们发现嗅觉刺激的价值归因出现了负面偏差,而这种偏差会对抗抑郁药物产生反应。这一结果与我们在双相抑郁症患者身上观察到的气味价值分配的改变相一致。鉴于杏仁核在价值编码中的关键作用及其与抑郁症的密切联系,我们假设基底外侧杏仁核(BLA)回路的改变可能会支持与抑郁状态相关的负性转变。与人类不同的是,人类的成像工具空间分辨率有限,难以对杏仁核进行简单的分割,而最近揭示的特定杏仁核基底外侧环路则与小鼠的消极和积极情绪归因有关。我们将基于 CTB 和狂犬病的追踪与体内外神经元活动测量相结合,证明了在抑郁状态下,特定 BLA 回路的活动紊乱支持了负价偏差。长期服用 CORT 会导致优先参与正向价值编码的 BLA 至 NAc 神经元的招募减少,而优先参与负向价值编码的 BLA 至 CEA 神经元的招募增加。重要的是,BLA-to-NAc 神经元的化学超激活抑制了这种功能障碍。此外,BLA 活动的改变与来自丘脑室旁核的持久突触前连接变化相关,而最近的研究表明,丘脑室旁核在杏仁核中协调着价值分配。总之,我们的研究结果表明,特定的BLA回路改变可能会支持抑郁状态下的负偏向,并为转化研究提供了新的途径,以了解抑郁的内在机制和治疗效果。
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引用次数: 0
Atypical effective connectivity from the frontal cortex to striatum in alcohol use disorder 酒精使用障碍患者从额叶皮层到纹状体的非典型有效连接
IF 6.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-18 DOI: 10.1038/s41398-024-03083-8
Hongwen Song, Ping Yang, Xinyue Zhang, Rui Tao, Lin Zuo, Weili Liu, Jiaxin Fu, Zhuo Kong, Rui Tang, Siyu Wu, Liangjun Pang, Xiaochu Zhang

Alcohol use disorder (AUD) is a profound psychiatric condition marked by disrupted connectivity among distributed brain regions, indicating impaired functional integration. Previous connectome studies utilizing functional magnetic resonance imaging (fMRI) have predominantly focused on undirected functional connectivity, while the specific alterations in directed effective connectivity (EC) associated with AUD remain unclear. To address this issue, this study utilized multivariate pattern analysis (MVPA) and spectral dynamic causal modeling (DCM). We recruited 32 abstinent men with AUD and 30 healthy controls (HCs) men, and collected their resting-state fMRI data. A regional homogeneity (ReHo)-based MVPA method was employed to classify AUD and HC groups, as well as predict the severity of addiction in AUD individuals. The most informative brain regions identified by the MVPA were further investigated using spectral DCM. Our results indicated that the ReHo-based support vector classification (SVC) exhibits the highest accuracy in distinguishing individuals with AUD from HCs (classification accuracy: 98.57%). Additionally, our results demonstrated that ReHo-based support vector regression (SVR) could be utilized to predict the addiction severity (alcohol use disorders identification test, AUDIT, R2 = 0.38; Michigan alcoholism screening test, MAST, R2 = 0.29) of patients with AUD. The most informative brain regions for the prediction include left pre-SMA, right dACC, right LOFC, right putamen, and right NACC. These findings were validated in an independent data set (35 patients with AUD and 36 HCs, Classification accuracy: 91.67%; AUDIT, R2 = 0.17; MAST, R2 = 0.20). The results of spectral DCM analysis indicated that individuals with AUD exhibited decreased EC from the left pre-SMA to the right putamen, from the right dACC to the right putamen, and from the right LOFC to the right NACC compared to HCs. Moreover, the EC strength from the right NACC to left pre-SMA and from the right dACC to right putamen mediated the relationship between addiction severity (MAST scores) and behavioral measures (impulsive and compulsive scores). These findings provide crucial evidence for the underlying mechanism of impaired self-control, risk assessment, and impulsive and compulsive alcohol consumption in individuals with AUD, providing novel causal insights into both diagnosis and treatment.

酒精使用障碍(AUD)是一种严重的精神疾病,其特征是分布在大脑各区域之间的连接中断,表明功能整合受损。以往利用功能磁共振成像(fMRI)进行的连接组研究主要关注非定向功能连接,而与 AUD 相关的定向有效连接(EC)的具体改变仍不清楚。为了解决这一问题,本研究采用了多变量模式分析(MVPA)和频谱动态因果建模(DCM)。我们招募了 32 名患有 AUD 的禁欲男性和 30 名健康对照(HCs)男性,并收集了他们的静息态 fMRI 数据。我们采用基于区域同质性(ReHo)的 MVPA 方法对 AUD 和 HC 组进行了分类,并预测了 AUD 患者的成瘾严重程度。我们使用频谱 DCM 进一步研究了 MVPA 确定的信息量最大的脑区。结果表明,基于 ReHo 的支持向量分类法(SVC)在区分 AUD 患者和 HC 患者方面表现出最高的准确率(分类准确率:98.57%)。此外,我们的结果表明,基于 ReHo 的支持向量回归(SVR)可用于预测 AUD 患者的成瘾严重程度(酒精使用障碍识别测试 AUDIT,R2 = 0.38;密歇根酒精中毒筛查测试 MAST,R2 = 0.29)。对预测最有参考价值的脑区包括左侧前SMA、右侧dACC、右侧LOFC、右侧putamen和右侧NACC。这些结果在一个独立的数据集中得到了验证(35 名 AUD 患者和 36 名 HC,分类准确率:91.67%;AUDIT,R2 = 0.17;MAST,R2 = 0.20)。频谱 DCM 分析结果表明,与 HCs 相比,AUD 患者从左侧前 SMA 到右侧 Putamen、从右侧 dACC 到右侧 Putamen 以及从右侧 LOFC 到右侧 NACC 的 EC 均有所下降。此外,从右侧NACC到左侧前SMA以及从右侧dACC到右侧丘脑的EC强度介导了成瘾严重程度(MAST评分)和行为测量(冲动和强迫评分)之间的关系。这些发现为AUD患者自我控制能力受损、风险评估以及冲动性和强迫性饮酒的潜在机制提供了重要证据,为诊断和治疗提供了新的因果关系见解。
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引用次数: 0
Social isolation impairs cognition via Aβ-mediated synaptic dysfunction 社会隔离通过 Aβ 介导的突触功能障碍损害认知能力
IF 6.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-18 DOI: 10.1038/s41398-024-03078-5
Fang Huang, Xinghua Liu, Qian Guo, Yacoubou Abdoul Razak Mahaman, Bin Zhang, Jian-Zhi Wang, Hongbin Luo, Rong Liu, Xiaochuan Wang

Social isolation (SI) is a common phenomenon in the modern world, especially during the coronavirus disease 2019 pandemic, and causes lasting cognitive impairments and mental disorders. However, it is still unclear how SI alters molecules in the brain and induces behavioural dysfunctions. Here, we report that SI impairs cognitive function and induces depressive-like behaviours in C57BL/6 J mice, in addition to impairing synaptic plasticity and increasing the levels of APP cleavage-related enzymes, thereby promoting Aβ production. Moreover, we show that in APP/PS1 transgenic mice, SI accelerates pathological changes and behavioural deficits. Interestingly, downregulation of the expression of the BACE1 attenuates SI-induced Aβ toxicity and synaptic dysfunction. Furthermore, early intervention with BACE1 shRNA blocks SI-induced cognitive impairments. Together, our data strongly suggest that SI-induced upregulation of BACE1 expression mediates Aβ toxicity and induces behavioural deficits. Down-regulation of BACE1 may be a promising strategy for preventing SI-induced cognitive impairments.

社会隔离(SI)是现代世界的一种普遍现象,尤其是在冠状病毒病 2019 年大流行期间,它会导致持久的认知障碍和精神障碍。然而,目前仍不清楚社会隔离如何改变大脑分子并诱发行为功能障碍。在这里,我们报告了 SI 损害 C57BL/6 J 小鼠的认知功能并诱发抑郁样行为,此外还损害突触可塑性并增加 APP 裂解相关酶的水平,从而促进 Aβ 的产生。此外,我们还发现,在 APP/PS1 转基因小鼠中,SI 会加速病理变化和行为缺陷。有趣的是,下调 BACE1 的表达可减轻 SI 诱导的 Aβ 毒性和突触功能障碍。此外,使用 BACE1 shRNA 进行早期干预可阻止 SI 诱导的认知障碍。总之,我们的数据有力地表明,SI 诱导的 BACE1 表达上调介导了 Aβ 的毒性并诱发了行为障碍。下调BACE1可能是预防SI诱导的认知障碍的一种有效策略。
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引用次数: 0
Correction: Plasma concentrations of lysophosphatidic acid and the expression of its receptors in peripheral blood mononuclear cells are altered in patients with cocaine use disorders. 更正:可卡因使用障碍患者血浆中溶血磷脂酸的浓度及其受体在外周血单核细胞中的表达发生了改变。
IF 5.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-17 DOI: 10.1038/s41398-024-03096-3
María Flores-López, Nuria García-Marchena, Francisco J Pavón-Morón, Nerea Requena-Ocaña, Laura Sánchez-Marín, Laura Martín-Chaves, Mónica García-Medina, Carmen Pedraza, Estela Castilla-Ortega, Juan J Ruiz, Fernando Rodríguez de Fonseca, Pedro Araos, Antonia Serrano
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引用次数: 0
Endogenous mu-opioid modulation of social connection in humans: a systematic review and meta-analysis 内源性μ-阿片对人类社会联系的调节:系统回顾和荟萃分析
IF 6.8 1区 医学 Q1 PSYCHIATRY Pub Date : 2024-09-17 DOI: 10.1038/s41398-024-03088-3
Guro Løseth, Martin Trøstheim, Siri Leknes

Social bonding, essential for health and survival in all social species, depends on mu-opioid signalling in non-human mammals. A growing neuroimaging and psychopharmacology literature also implicates mu-opioids in human social connectedness. To determine the role of mu-opioids for social connectedness in healthy humans, we conducted a preregistered (https://osf.io/x5wmq) multilevel random-effects meta-analysis of randomised double-blind placebo-controlled opioid antagonist studies. We included data from 8 publications and 2 unpublished projects, totalling 17 outcomes (N = 455) sourced from a final literature search in Web of Science, Scopus, PubMed and EMBASE on October 12, 2023, and through community contributions. All studies used naltrexone (25–100 mg) to block the mu-opioid system and measured social connectedness by self-report. Opioid antagonism slightly reduced feelings of social connectedness (Hedges’ g [95% CI) = −0.20] [−0.32, −0.07]. Results were highly consistent within and between studies (I2 = 23%). However, there was some indication of bias in favour of larger effects among smaller studies (Egger’s test: B = −2.16, SE = 0.93, z = −2.33, p = 0.02), and publication bias analysis indicated that the effect of naltrexone might be overestimated. The results clearly demonstrate that intact mu-opioid signalling is not essential for experiencing social connectedness, as robust feelings of connectedness are evident even during full pharmacological mu-opioid blockade. Nevertheless, antagonism reduced measures of social connection, consistent with a modulatory role of mu-opioids for human social connectedness. The modest effect size relative to findings in non-human animals, could be related to differences in measurement (subjective human responses versus behavioural/motivation indices in animals), species specific neural mechanisms, or naltrexone effects on other opioid receptor subtypes. In sum, these results help explain how mu-opioid dysregulation and social disconnection can contribute to disability, and conversely—how social connection can buffer risk of ill health.

在非人类哺乳动物中,对所有社会性物种的健康和生存都至关重要的社会联系依赖于μ-阿片信号。越来越多的神经影像学和精神药理学文献也表明,μ-阿片类药物与人类的社会联系有关。为了确定μ-阿片类药物在健康人的社会联系中的作用,我们对随机双盲安慰剂对照阿片类拮抗剂研究进行了预先登记(https://osf.io/x5wmq)的多层次随机效应荟萃分析。我们从 2023 年 10 月 12 日在 Web of Science、Scopus、PubMed 和 EMBASE 中进行的最终文献检索以及社区贡献中获得了 8 篇出版物和 2 个未发表项目的数据,共计 17 项结果(N = 455)。所有研究都使用纳曲酮(25-100 毫克)来阻断μ-阿片系统,并通过自我报告来测量社会联系。阿片类药物拮抗略微降低了社会联系感(Hedges' g [95% CI) = -0.20] [-0.32, -0.07] 。[-0.32, -0.07].研究内部和研究之间的结果高度一致(I2 = 23%)。然而,有迹象表明,在较小的研究中存在偏向于较大效应的偏倚(Egger 检验:B = -2.16,SE = 0.93,z = -2.33,p = 0.02),发表偏倚分析表明,纳曲酮的效应可能被高估。研究结果清楚地表明,完整的μ-阿片信号并不是体验社会连通性的必要条件,因为即使在完全药物阻断μ-阿片的情况下,也能明显感受到强烈的连通性。然而,拮抗剂降低了社会联系的测量结果,这与μ-阿片类药物对人类社会联系的调节作用是一致的。相对于非人类动物的研究结果,纳曲酮的影响范围不大,这可能与测量方法的差异(人类的主观反应与动物的行为/动机指数)、特定物种的神经机制或纳曲酮对其他阿片受体亚型的影响有关。总之,这些结果有助于解释μ-阿片调节失调和社会脱节是如何导致残疾的,反之,社会联系又是如何缓冲不良健康风险的。
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引用次数: 0
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Translational Psychiatry
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