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Targeting neurochemical and immune dysregulation in schizophrenia: From molecular mechanisms to emerging therapeutic strategies 针对精神分裂症的神经化学和免疫失调:从分子机制到新兴的治疗策略。
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-24 DOI: 10.1016/j.pnpbp.2025.111535
Aastha Datta , Himani Rana, Shareen Singh , Thakur Gurjeet Singh
Schizophrenia is a multifaceted neuropsychiatric condition marked by a diverse array of symptoms, which can be categorized into positive, negative, and cognitive deficits. The underlying pathophysiology of this disorder is complex, involving a variety of mechanisms such as the dysregulation of neurotransmitter systems, neuroinflammatory responses, and neuronal dysfunction induced by oxidative stress. These interrelated processes lead to synaptic and neuronal impairments, which ultimately result in the clinical manifestations observed in patients with schizophrenia. The challenge of elucidating the molecular mechanisms that contribute to schizophrenia is significant, given the disorder's intricate and multifactorial characteristics. Neuroinflammatory pathways, such as those involving NF-κB, MAPK/ERK, kynurenine pathway and the activation of the NLRP3 inflammasome, play a significant role in promoting oxidative stress, synaptic dysfunction, and neuronal injury, which in turn aggravate cognitive and negative symptoms associated with schizophrenia. Although current pharmacological treatments primarily focus on dopamine and glutamate systems, their limited effectiveness in alleviating cognitive and negative symptoms highlights the necessity for a deeper mechanistic understanding of the disorder at the molecular level. Progress in neurobiological research, particularly concerning inflammatory pathways, mitochondrial dysfunction, and synaptic plasticity, is essential for the development of more targeted and effective therapeutic strategies for schizophrenia. This review underscores the critical need for a deeper understanding of molecular insights and treatment methodologies in the context of schizophrenia.
精神分裂症是一种多方面的神经精神疾病,以各种各样的症状为特征,可分为阳性、阴性和认知缺陷。这种疾病的潜在病理生理是复杂的,涉及多种机制,如神经递质系统失调、神经炎症反应和氧化应激诱导的神经元功能障碍。这些相互关联的过程导致突触和神经元损伤,最终导致在精神分裂症患者中观察到的临床表现。鉴于精神分裂症的复杂和多因素特征,阐明导致精神分裂症的分子机制的挑战是重大的。神经炎症通路,如涉及NF-κB、MAPK/ERK、犬尿氨酸通路和NLRP3炎性体激活的神经炎症通路,在促进氧化应激、突触功能障碍和神经元损伤中发挥重要作用,从而加重精神分裂症相关的认知和阴性症状。虽然目前的药物治疗主要集中在多巴胺和谷氨酸系统,但它们在缓解认知和阴性症状方面的有限效果突出了在分子水平上对该疾病进行更深入的机制理解的必要性。神经生物学研究的进展,特别是关于炎症途径、线粒体功能障碍和突触可塑性的研究,对于开发更有针对性和更有效的精神分裂症治疗策略至关重要。这篇综述强调了在精神分裂症的背景下,对分子见解和治疗方法有更深入的了解的迫切需要。
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引用次数: 0
Cognitive electroencephalographic potentials evoked by words as markers of the severity of the pathology and resistance to treatment in obsessive-compulsive disorder. 词语诱发的认知脑电图电位作为强迫症病理严重程度和治疗抵抗的标志。
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-24 DOI: 10.1016/j.pnpbp.2025.111530
Issa Wassouf , Nicolas Vibert , Julien Dampuré , Damien Doolub , Ghina Harika-Germaneau , Nicolas Langbour , Nematollah Jaafari
Patients suffering from obsessive-compulsive disorder (OCD) show an attentional bias towards pathology-related words. Electroencephalographic cognitive potentials were used to investigate how patients responded to words related to their obsessions and compulsions. Forty OCD patients with various levels of severity and treatment-resistance were included to assess links between word-evoked potentials and patients' clinical variables, and compared with 40 control participants. The P200 component evoked by both neutral and pathology-related words was greater in patients than in controls, suggesting that patients were more attentive overall. In the N400 time window, pathology-related words evoked less negative potentials than neutral words in OCD patients, suggesting that pathology-related words were particularly familiar to them and permanently pre-activated in their mental lexicon. Finally, correlations were detected between pathology severity and the profile of word-evoked potentials in the N400 time window, and between the patients' treatment resistance and the amplitude of late word-evoked positive potentials (P600).
患有强迫症(OCD)的患者表现出对病理相关词汇的注意偏倚。使用脑电图认知电位来调查患者对与他们的强迫和强迫有关的词语的反应。本研究选取了40名不同严重程度和治疗抵抗程度的强迫症患者,以评估词诱发电位与患者临床变量之间的联系,并与40名对照受试者进行比较。中性词和病理相关词诱发的P200成分在患者中比对照组更大,表明患者总体上更专注。在N400时间窗内,病理相关词诱发的负性电位低于中性词,说明病理相关词在强迫症患者的心理词汇中特别熟悉,并被永久预激活。最后,我们发现病理严重程度与N400时间窗内的单词诱发电位分布、患者的治疗抵抗与晚期单词诱发正电位振幅之间存在相关性(P600)。
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引用次数: 0
Adverse event reporting and management in psilocybin therapy clinical trials: A systematic review to guide clinical and research protocol development 裸盖菇素治疗临床试验中的不良事件报告和管理:指导临床和研究方案制定的系统综述。
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-23 DOI: 10.1016/j.pnpbp.2025.111541
Danielle Bukovsky , Aron Amaev , Jianmeng Song , Shannen Kyte , Edgardo Carmona-Torres , Fumihiko Ueno , Vincenzo Deluca , Antonio P. Strafella , Muhammad I. Husain , Ariel Graff-Guerrero , Philip Gerretsen
Psilocybin, a psychedelic prodrug, has gained renewed interest for its potential to treat various psychiatric disorders, including depression, anxiety, and substance use disorders. While promising, concerns remain regarding its safety profile and the management of potential adverse events (AEs). This systematic review aimed to evaluate the incidence, nature, and severity of adverse events and serious adverse events (SAEs) associated with psilocybin use across diverse clinical populations.
A comprehensive search was conducted across MEDLINE, Embase, and APA PsycInfo via the OVID platform, from database inception to June 5, 2024. A total of 42 clinical studies (N = 1068 participants) met inclusion criteria, all of which reported on AEs and/or SAEs following psilocybin administration. All studies were deemed to have a high risk of bias due to concerns regarding blinding. We synthesized information on common, uncommon, and SAEs, instances of suicidal ideation, methods of measuring AEs, and AEs requiring medical intervention. Reported AEs included headache, transient increases in blood pressure, and nausea, which typically resolved on their own. In rare instances, medical intervention was required. SAEs were reported infrequently in 2 of 42 studies and were limited to participants with underlying depressive disorders (e.g., suicidal behaviour, hospitalization).
Overall, psilocybin appears to have a favourable safety profile when administered in controlled settings. Based on our findings, we provide an outline of commonly reported AEs, uncommon AEs, SAEs, and considerations for future clinical and research protocols.
裸盖菇素是一种致幻前药,因其治疗各种精神疾病的潜力而重新引起人们的兴趣,包括抑郁症、焦虑症和物质使用障碍。尽管前景看好,但对其安全性和潜在不良事件(ae)管理的担忧仍然存在。本系统综述旨在评估不同临床人群中与裸盖菇素使用相关的不良事件和严重不良事件(SAEs)的发生率、性质和严重程度。通过OVID平台对MEDLINE、Embase和APA PsycInfo进行了全面的搜索,从数据库建立到2024年5月6日。共有42项临床研究(N = 1068名受试者)符合纳入标准,所有研究均报告了裸盖菇素给药后的ae和/或sae。由于考虑到盲法,所有的研究都被确定为高偏倚风险。我们综合了常见、不常见和严重不良事件、自杀意念、不良事件测量方法和需要医疗干预的不良事件的信息。报告的不良反应包括头痛、短暂性血压升高和恶心,这些症状通常会自行消退。在极少数情况下,需要进行医疗干预。42项研究中有2项报告了罕见的严重不良事件,并且仅限于有潜在抑郁障碍(如自杀行为、住院)的参与者。总的来说,裸盖菇素在受控环境下似乎具有良好的安全性。基于我们的发现,我们概述了常见的ae、不常见的ae、sae,以及对未来临床和研究方案的考虑1。
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引用次数: 0
Dopamine disruption and autism phenotypes in slc6a3−/− zebrafish: Behavioural and molecular insights slc6a3-/-斑马鱼的多巴胺破坏和自闭症表型:行为和分子的见解。
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-14 DOI: 10.1016/j.pnpbp.2025.111528
Wen Li , Xiaocong Zhang , Xiaoyu Niu , Nan Qin , Lulu Kang , Kai Wang , Mingyong Wang
Dopamine plays a crucial role in regulating movement, motivation, attention, and emotions. Disruptions in dopamine metabolism have been linked to various psychiatric disorders, including autism spectrum disorder (ASD). In this study, we generated an slc6a3 knockout zebrafish model using the CRISPR-Cas9 system to investigate the relationship between dopamine dysfunction and autism. Our results revealed that slc6a3 knockout significantly reduced dopamine levels, leading to impaired dopamine synthesis, transport, and metabolism. Behavioural analysis demonstrated that slc6a3−/− zebrafish exhibited decreased motor activity, increased anxiety-like behaviour, and autism-related symptoms, such as impaired social ability and “digging” behaviour. Pharmacological intervention with risperidone and clozapine improved motor function, social interaction, and anxiety levels, with risperidone showing superior effects. Transcriptomic analysis identified significant changes in several nervous system-related genes in slc6a3−/− zebrafish, suggesting that these gene alterations may contribute to the observed behavioural abnormalities. Our study highlights the crucial role of dopamine dysfunction in autism and establishes slc6a3−/− zebrafish as a valuable model for studying autism and screening potential therapeutic drugs.
多巴胺在调节运动、动机、注意力和情绪方面起着至关重要的作用。多巴胺代谢紊乱与各种精神疾病有关,包括自闭症谱系障碍(ASD)。在本研究中,我们利用CRISPR-Cas9系统构建了slc6a3敲除斑马鱼模型,研究多巴胺功能障碍与自闭症之间的关系。我们的研究结果显示,slc6a3敲除显著降低多巴胺水平,导致多巴胺合成、运输和代谢受损。行为分析表明,slc6a3-/-斑马鱼表现出运动活动减少,焦虑样行为增加,以及自闭症相关症状,如社交能力受损和“挖掘”行为。利培酮和氯氮平的药物干预改善了运动功能、社交互动和焦虑水平,其中利培酮表现出更好的效果。转录组学分析发现,slc6a3-/-斑马鱼的几个神经系统相关基因发生了显著变化,表明这些基因改变可能导致观察到的行为异常。我们的研究强调了多巴胺功能障碍在自闭症中的重要作用,并建立了slc6a3-/-斑马鱼作为研究自闭症和筛选潜在治疗药物的有价值的模型。
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引用次数: 0
The possible effect of fentanyl on PTSD 芬太尼对创伤后应激障碍的可能影响。
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-02 DOI: 10.1016/j.pnpbp.2025.111519
Yehudit O. Weiss Schonberg , Leehe Peled-Avron
Post-traumatic stress disorder (PTSD) is a severe mental health disorder that appears as a result of trauma exposure and adversely affects the daily life and well-being of those who suffer from it. Major risk factors for PTSD include serving as a combat soldier and having traumatic and painful injuries. This review aims to investigate the possible beneficial effects of fentanyl on PTSD, and the possible theoretical mechanisms at the base of these effects. Fentanyl is a powerful analgesic from the opioid family that is often administered in cases of painful injuries, both as a prehospital battlefield treatment and at the hospital. Morphine, another opioid used for analgesia in similar situations, was shown to help both with the prevention and treatment of PTSD. Only a few studies examine the direct influence of fentanyl on PTSD, but there is evidence that indirectly suggests that fentanyl can treat or prevent PTSD via three mediating factors. In this review we suggest three possible hypotheses. In one possible route, the influence of fentanyl on PTSD is mediated by pain relief. Fentanyl was found to effectively reduce pain, and a positive correlation between pain level and PTSD severity was also found. The second route suggests that fentanyl's influence on PTSD is mediated by the activity of the vagus nerve. There is evidence that fentanyl administration results in vagal activity and that the activation of the vagus nerve reduces PTSD levels. A third possible route may be through fentanyl's activation of opioid receptors in limbic region which were found to have protective effects against PTSD. Future research of fentanyl's role in PTSD prevention and treatment is essential, and should account for pre-existing mental health struggles, TBI, delirium, and injury severity.
创伤后应激障碍(PTSD)是一种严重的心理健康障碍,由于创伤暴露而出现,并对患者的日常生活和福祉产生不利影响。创伤后应激障碍的主要风险因素包括作为一名战斗士兵,遭受创伤和痛苦的伤害。本文旨在探讨芬太尼对创伤后应激障碍可能的有益作用,以及这些作用的可能理论机制。芬太尼是阿片类药物家族的一种强效镇痛药,通常用于疼痛损伤的病例,既可作为院前战场治疗,也可在医院使用。吗啡,另一种在类似情况下用于镇痛的阿片类药物,被证明有助于预防和治疗创伤后应激障碍。只有少数研究考察了芬太尼对PTSD的直接影响,但有证据间接表明芬太尼可以通过三个中介因素治疗或预防PTSD。在这篇综述中,我们提出了三种可能的假设。在一种可能的途径中,芬太尼对创伤后应激障碍的影响是通过疼痛缓解介导的。芬太尼能有效减轻疼痛,疼痛程度与创伤后应激障碍严重程度呈正相关。第二种途径表明芬太尼对PTSD的影响是由迷走神经的活动介导的。有证据表明,芬太尼的服用会导致迷走神经活动,迷走神经的激活会降低PTSD的水平。第三种可能的途径是通过芬太尼激活边缘区域的阿片受体,这种受体被发现对创伤后应激障碍有保护作用。芬太尼在PTSD预防和治疗中的作用的未来研究是必不可少的,并且应该考虑到先前存在的精神健康斗争,TBI,谵妄和伤害严重程度。
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引用次数: 0
Differential effects of psilocybin and lisuride on serotonin and dopamine neuronal activity and behavior 裸盖菇素和lisuride对血清素和多巴胺神经元活动和行为的不同影响。
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-02 DOI: 10.1016/j.pnpbp.2025.111522
Brandon Richardson , Antonio Inserra , Michael Pileggi , Thomas Prud’Homme , Vitor Bruno , Derek Wan-Yan-Chan , Ilia Shareghi-Ghahreman , Sofia Nasini , Tadhg Strand , Marco Leyton , Nahum Sonenberg , Danilo De Gregorio , Jeffrey Sprouse , Francis R. Bambico , Gabriella Gobbi
Psilocybin and lisuride are 5-HT2A receptor agonists, but only psilocybin elicits the head twitch response (HTR) in rodents, a behavior commonly used as a proxy for hallucinogenic activity. This study aimed to compare their effects on serotonin (5-HT) and dopamine (DA) neuronal activity, as well as related behavioral outcomes, to elucidate the mechanisms underlying their divergent effects. Adult male C57BL/6N mice were administered intraperitoneal injections of psilocybin (0.3–3 mg/kg), lisuride (0.1–0.5 mg/kg), or vehicle. In vivo electrophysiological recordings were performed in the dorsal raphe nucleus (DRN) and substantia nigra (SN) to monitor 5-HT and DA neuronal firing. MDL 100907 (0.2 mg/kg) pretreatment was used to determine 5-HT2A receptor specificity. Behavioral assessments included HTR testing 10 min post-injection, followed by either the forced swim test (FST), open field test (OFT), or elevated plus maze (EPM) at 20 min post-injection. Psilocybin-induced inhibition, but not lisuride-induced inhibition, of 5-HT neuron firing was blocked by MDL 100907. Both drugs reduced DA neuron firing, however, lisuride's effect was more sensitive to 5-HT2A receptor antagonism. Psilocybin elicited HTR, while lisuride did not. In the FST, only high-dose lisuride reduced immobility time. Both drugs reduced locomotor activity in the OFT and EPM. Principal Component Analysis (PCA) sufficiently separated the effects of each drug from each other, indicating distinct effect profiles. Although both drugs target 5-HT2A receptors, they engage distinct neurobiological pathways. Psilocybin produces psychedelic-like, 5-HT–dominant effects, whereas lisuride displays DA-linked improvements in coping behavior, informing future development of serotonergic therapeutics.
裸盖菇素和lisuride是5-HT2A受体激动剂,但只有裸盖菇素引起啮齿动物的头抽搐反应(HTR),这种行为通常被用作致幻活性的代理。本研究旨在比较它们对5-羟色胺(5-HT)和多巴胺(DA)神经元活动的影响,以及相关的行为结果,以阐明它们不同作用的机制。给成年雄性C57BL/6 N小鼠腹腔注射裸盖菇素(0.3-3 mg/kg)、利尿苷(0.1-0.5 mg/kg)或载药。在中缝背核(DRN)和黑质(SN)进行体内电生理记录,监测5-HT和DA神经元的放电情况。采用MDL 100907(0.2 mg/kg)预处理,测定5-HT2A受体特异性。行为评估包括注射后10 分钟HTR测试,然后在注射后20 分钟进行强迫游泳测试(FST)、野外测试(OFT)或升高加迷宫(EPM)。MDL 100907可阻断裸盖菇碱诱导的5-HT神经元放电抑制,而非利尿苷诱导的5-HT神经元放电抑制。两种药物均能减少DA神经元的放电,但lisuride的作用对5-HT2A受体拮抗剂更为敏感。裸盖菇素引起HTR,而利苏脲则没有。在FST中,只有高剂量的lisuride减少了静止时间。这两种药物都降低了OFT和EPM的运动活动。主成分分析(PCA)充分地分离了每种药物的作用,表明了不同的作用概况。虽然这两种药物都靶向5-HT2A受体,但它们参与不同的神经生物学途径。裸盖菇素产生类似迷幻剂的5- ht主导效应,而lisuride显示与da相关的应对行为改善,为5-羟色胺能疗法的未来发展提供了信息。
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引用次数: 0
Neurogliovascular unit adaptations following chronic distress predict motivational deficits in mice 慢性痛苦后的神经胶质血管单位适应预测小鼠的动机缺陷。
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-02 DOI: 10.1016/j.pnpbp.2025.111510
Lidia Cabeza , Damien Mor , Bahrie Ramadan , Guillaume Benhora-Chabeaux , Christophe Houdayer , Emmanuel Haffen , Yvan Peterschmitt , Adeline Etievant , Fanchon Bourasset
The neurogliovascular unit (NGVU) reflects the complex interplay between neural tissue and blood flow. Dysfunction in this NGVU system is involved in neuropsychiatric disorders, however, whether the alterations are a cause or consequence of these conditions remains unclear. This study investigates the role of NGVU adaptations in motivational deficits associated with depressive episodes, focusing on blood vessel structural changes and blood-brain barrier (BBB) permeability. We used brain samples from adult male C57BL/6jRj mice that were chronically treated with corticosterone (CORT), and which presented severe motivational deficits in an operant progressive ratio task, along with altered neural activation in brain regions involved in motivational processing (anterior insular cortex, basolateral amygdala, bed nucleus of the stria terminalis and ventral tegmental area), as assessed by FosB expression. NGVU modifications were first evaluated through immunofluorescence staining for microglia (IBA-1), endothelial tight junctions (ZO-1), and astrocytes (GFAP). BBB permeability was assessed using intravenous perfusion of fluorescent 40 kDa Dextran. Principal component analysis revealed that NGVU alterations in the ventral tegmental area and basolateral amygdala predicted motivational deficits in CORT-treated mice. Specifically, ZO-1 expression was downregulated, and Dextran extravasation was increased in these regions. These findings suggest that NGVU adaptations induced by chronic CORT exposure impact BBB integrity and are integral to understanding behavioural performance. In conclusion, NGVU modifications may play a key role in the cognitive and behavioural dysfunction seen in neuropsychiatric disorders, highlighting their relevance in the biological substrate of these conditions.
神经胶质血管单位(NGVU)反映了神经组织和血流之间复杂的相互作用。NGVU系统的功能障碍与神经精神疾病有关,然而,这种改变是这些疾病的原因还是结果尚不清楚。本研究探讨了NGVU适应在与抑郁发作相关的动机缺陷中的作用,重点关注血管结构变化和血脑屏障(BBB)渗透性。我们使用了长期使用皮质酮(CORT)治疗的成年雄性C57BL/6jRj小鼠的大脑样本,这些小鼠在操作进行性比率任务中表现出严重的动机缺陷,同时在涉及动机加工的大脑区域(岛叶前部皮层、杏仁核基底外侧、纹底床核和腹侧被盖区)的神经激活发生改变,通过FosB表达进行评估。首先通过免疫荧光染色对小胶质细胞(IBA-1)、内皮细胞紧密连接(ZO-1)和星形胶质细胞(GFAP)进行NGVU修饰评价。静脉灌注荧光40 kDa葡聚糖评估血脑屏障通透性。主成分分析显示,NGVU在腹侧被盖区和杏仁核基底外侧的改变预测了cort治疗小鼠的动机缺陷。具体来说,ZO-1表达下调,右旋糖酐外渗增加。这些发现表明,慢性CORT暴露诱导的NGVU适应会影响血脑屏障的完整性,这对于理解行为表现是不可或缺的。综上所述,NGVU修饰可能在神经精神疾病的认知和行为功能障碍中发挥关键作用,突出了它们在这些疾病的生物学基础中的相关性。
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引用次数: 0
Oral guanfacine treatment ameliorates the ADHD-like symptoms caused by developmental manganese exposure 口服胍法辛治疗可改善发育性锰暴露引起的adhd样症状。
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-02 DOI: 10.1016/j.pnpbp.2025.111517
Ellie Fisher , Stephane A. Beaudin , Barbara J. Strupp , Donald R. Smith
Epidemiological studies have linked developmental manganese (Mn) exposure to increased risk of ADHD and related symptoms in children and adolescents. Rodent model studies have 1) confirmed causality by demonstrating that developmental Mn exposure can cause lasting ADHD-like symptoms, 2) revealed that these symptoms (in Mn-exposed animals) are accompanied by a hypofunctioning catecholaminergic system in fronto-cortical-striatal brain areas, and 3) demonstrated that methylphenidate is efficacious in ameliorating these ADHD-like symptoms in Mn-exposed animals. However, stimulant medications such as methylphenidate do not lessen symptoms in 25–30 % of children and adolescents diagnosed with ADHD, indicating the need for alternative ADHD medications. Guanfacine, a specific noradrenergic α2A receptor agonist, has proven to be an effective non-stimulant ADHD medication, although it is unknown whether this drug is effective in treating the ADHD-like symptoms produced by developmental Mn exposure. The present study was designed to test this hypothesis. Additionally, due to the pharmacological specificity of guanfacine, its use may provide mechanistic insight into the role of noradrenergic dysfunction as a contributor to the Mn-induced impairments. Male Long-Evans neonatal rats were orally dosed with vehicle or Mn (50 mg Mn/kg/d) from postnatal day 1–21, and orally treated with guanfacine (0, 0.1, or 0.3 mg/kg/d) during behavioral testing as adults. The results revealed that developmental Mn exposure produced lasting impairments in impulse control, attention, and sensorimotor function, and that oral guanfacine was efficacious in ameliorating the Mn-induced impairments in all three functional domains, although the treatment duration needed for efficacy varied by functional domain. In addition, in control (unexposed) animals, there was little or no effect of guanfacine on any functional domain. There was also little effect of the drug in the Mn-exposed animals under trial conditions where Mn deficits did not emerge. These findings 1) demonstrate the efficacy of oral guanfacine to ameliorate the lasting ADHD-like symptoms caused by developmental Mn exposure, and 2) provide additional support for the hypothesis that hypofunctioning of the noradrenergic system contributes to these lasting Mn deficits. Collectively, these findings suggest that individuals with environmentally-induced ADHD, such as that induced by developmental Mn exposure, may benefit from oral guanfacine treatment.
流行病学研究表明,儿童和青少年在发育过程中接触锰与多动症及相关症状的风险增加有关。啮齿类动物模型研究1)证实了因果关系,证明发育性锰暴露可引起持久的adhd样症状,2)揭示了这些症状(在锰暴露的动物中)伴随着前额皮质纹状体脑区儿茶酚胺能系统功能减退,3)证明哌醋甲酯对改善锰暴露动物的这些adhd样症状有效。然而,兴奋剂药物如哌醋甲酯并不能减轻25- 30% %诊断为ADHD的儿童和青少年的症状,这表明需要替代ADHD药物。胍法辛是一种特异性去肾上腺素能α2A受体激动剂,已被证明是一种有效的非兴奋剂性ADHD药物,尽管尚不清楚该药物是否有效治疗发育性锰暴露引起的ADHD样症状。本研究旨在验证这一假设。此外,由于胍法辛的药理学特异性,它的使用可能提供去甲肾上腺素能功能障碍作为mn诱导损伤的一个因素的作用机制。从出生后1-21天开始,雄性龙-埃文斯新生大鼠口服小鼠或Mn(50 mg Mn/kg/d),成年后在行为测试期间口服胍法辛(0、0.1或0.3 mg/kg/d)。结果显示,发育性锰暴露会导致冲动控制、注意力和感觉运动功能的持续损伤,而口服胍法辛在改善锰诱导的所有三个功能域的损伤方面都是有效的,尽管所需的治疗时间因功能域而异。此外,在对照(未暴露)动物中,胍法辛对任何功能域的影响很小或没有影响。在没有出现锰缺陷的试验条件下,该药物对Mn暴露的动物也几乎没有影响。这些发现1)证明口服胍法辛可以改善发育性锰暴露引起的持续的adhd样症状,2)为去甲肾上腺素能系统功能障碍导致这些持续的锰缺陷的假设提供了额外的支持。总的来说,这些发现表明,环境诱发的ADHD个体,如发育性锰暴露诱发的ADHD,可能受益于口服胍法辛治疗。
{"title":"Oral guanfacine treatment ameliorates the ADHD-like symptoms caused by developmental manganese exposure","authors":"Ellie Fisher ,&nbsp;Stephane A. Beaudin ,&nbsp;Barbara J. Strupp ,&nbsp;Donald R. Smith","doi":"10.1016/j.pnpbp.2025.111517","DOIUrl":"10.1016/j.pnpbp.2025.111517","url":null,"abstract":"<div><div>Epidemiological studies have linked developmental manganese (Mn) exposure to increased risk of ADHD and related symptoms in children and adolescents. Rodent model studies have 1) confirmed causality by demonstrating that developmental Mn exposure can cause lasting ADHD-like symptoms, 2) revealed that these symptoms (in Mn-exposed animals) are accompanied by a hypofunctioning catecholaminergic system in fronto-cortical-striatal brain areas, and 3) demonstrated that methylphenidate is efficacious in ameliorating these ADHD-like symptoms in Mn-exposed animals. However, stimulant medications such as methylphenidate do not lessen symptoms in 25–30 % of children and adolescents diagnosed with ADHD, indicating the need for alternative ADHD medications. Guanfacine, a specific noradrenergic α<sub>2A</sub> receptor agonist, has proven to be an effective non-stimulant ADHD medication, although it is unknown whether this drug is effective in treating the ADHD-like symptoms produced by developmental Mn exposure. The present study was designed to test this hypothesis. Additionally, due to the pharmacological specificity of guanfacine, its use may provide mechanistic insight into the role of noradrenergic dysfunction as a contributor to the Mn-induced impairments. Male Long-Evans neonatal rats were orally dosed with vehicle or Mn (50 mg Mn/kg/d) from postnatal day 1–21, and orally treated with guanfacine (0, 0.1, or 0.3 mg/kg/d) during behavioral testing as adults. The results revealed that developmental Mn exposure produced lasting impairments in impulse control, attention, and sensorimotor function, and that oral guanfacine was efficacious in ameliorating the Mn-induced impairments in all three functional domains, although the treatment duration needed for efficacy varied by functional domain. In addition, in control (unexposed) animals, there was little or no effect of guanfacine on any functional domain. There was also little effect of the drug in the Mn-exposed animals under trial conditions where Mn deficits did not emerge. These findings 1) demonstrate the efficacy of oral guanfacine to ameliorate the lasting ADHD-like symptoms caused by developmental Mn exposure, and 2) provide additional support for the hypothesis that hypofunctioning of the noradrenergic system contributes to these lasting Mn deficits. Collectively, these findings suggest that individuals with environmentally-induced ADHD, such as that induced by developmental Mn exposure, may benefit from oral guanfacine treatment.</div></div>","PeriodicalId":54549,"journal":{"name":"Progress in Neuro-Psychopharmacology & Biological Psychiatry","volume":"142 ","pages":"Article 111517"},"PeriodicalIF":3.9,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145245277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The involvement of the endogenous opioid system in binge eating, food devaluation and food reward in mice 内源性阿片系统在小鼠暴食、食物贬值和食物奖励中的作用
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-02 DOI: 10.1016/j.pnpbp.2025.111539
Iffat Hasnin Era, Abdul Hamid, Kabirullah Lutfy
The endogenous opioid system is known to regulate both homeostatic and hedonic aspects of feeding behavior. In particular, the mu-opioid receptor (MOR) plays a central role in modulating palatable food intake and reward processing. This study investigated the contributions of MORs, and the two potential peptides, i.e., beta-endorphin (β-END), and enkephalin (ENK), acting on MORs in binge eating, food reward, and food devaluation using genetically modified mice. First, male mice lacking MORs and their wildtype littermates were tested for regular chow diet (RCD) and high fat diet (HFD) intake for 24 h each and tested for binge eating 4 weeks later. We found no change in RCD or HFD intake during the first exposure between mice of the two genotypes but mice lacking MORs showed reduced binge eating on a subsequent HFD exposure. Additionally, these mice showed diminished RCD devaluation after a 7-day HFD exposure to HFD. Furthermore, MORs knockout mice failed to exhibit any reward after conditioning with HFD. To explore which opioid peptide mediates these behaviors, mice lacking β-END or ENK and their wildtype controls were tested for binge eating, food devaluation and food reward. Mice lacking β-END displayed reduced binge eating and diminished food reward, but food devaluation remained unchanged. In contrast, mice lacking ENK exhibited no significant alterations in any of these responses. These findings demonstrate that MORs play a critical role in binge eating, food reward, and food devaluation, while β-END specifically contributes to binge eating and food reward. Enkephalins, however, appear to have minimal influence on these behaviors.
已知内源性阿片系统调节进食行为的稳态和享乐方面。特别是,mu-阿片受体(MOR)在调节美味食物摄入和奖励处理中起着核心作用。本研究利用转基因小鼠研究了MORs以及两种潜在肽,即β-内啡肽(β-END)和脑啡肽(ENK)对MORs在暴饮暴食、食物奖励和食物贬值中的作用。首先,研究人员对缺乏MORs的雄性小鼠及其野生型幼崽分别进行了24小时的常规饮食(RCD)和高脂肪饮食(HFD)摄入测试,并在4周后进行了暴食测试。我们发现两种基因型小鼠首次暴露时RCD或HFD摄入量没有变化,但缺乏MORs的小鼠在随后的HFD暴露中暴食减少。此外,这些小鼠暴露于HFD 7天后,RCD贬值减少。此外,MORs基因敲除小鼠在HFD条件反射后没有表现出任何奖励。为了探究是哪一种阿片肽介导了这些行为,我们对缺乏β-END或ENK的小鼠及其野生型对照进行了暴食、食物贬值和食物奖励的测试。缺乏β-END的小鼠暴食减少,食物奖励减少,但食物贬值保持不变。相比之下,缺乏ENK的小鼠在这些反应中没有表现出明显的变化。这些发现表明,MORs在暴饮暴食、食物奖励和食物贬值中起着关键作用,而β-END在暴饮暴食和食物奖励中起着特别的作用。然而,脑啡肽对这些行为的影响似乎微乎其微。
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引用次数: 0
Neural correlates of abnormal regional functional efficiency in major depressive disorder: a large, multi-scale study 重性抑郁症异常区域功能效率的神经相关因素:一项大型、多尺度的研究
IF 3.9 2区 医学 Q1 CLINICAL NEUROLOGY Pub Date : 2025-10-02 DOI: 10.1016/j.pnpbp.2025.111537
Keke Fang , Baohong Wen , Liang Liu , Ya Tian , Huiting Yang , Shaoqiang Han , Xianfu Sun , Lianjie Niu
Whether patients with major depressive disorder (MDD) are associated with abnormal regional functional efficiency (RFE) remain unknown. This study aimed to investigate the abnormal RFE pattern and its neural correlates in MDD using a large, multi-site cohort. We calculated voxel-wise RFE from resting-state functional magnetic resonance imaging data of 1265 MDD patients and 1094 matched healthy controls (HCs). Raw RFE values were transformed into W-scores using a normative model and then compared between MDD and HC groups. We validated the reproducibility of the group differences through leave-one-site-out and subsample validation approaches. Additionally, we examined the associations between the abnormal RFE pattern and clinical features, as well as neurotransmitter receptor/transporter profiles derived from a public positron emission tomography-based atlas. Our results showed that MDD was associated with increased RFE in the cerebellum, thalamus, bilateral dorsolateral prefrontal cortex, and the middle and inferior frontal gyrus, while decreased RFE was observed in the posterior cingulate, precuneus, postcentral gyrus, and fusiform gyrus. This abnormal pattern demonstrated high spatial similarity with validation results, indicating reproducibility. Early-onset MDD patients exhibited reduced RFE in the bilateral ventromedial prefrontal cortex, bilateral insula, left putamen, right caudate, and angular gyrus, alongside increased RFE in the cerebellum anterior lobe, cuneus, and precuneus compared to middle-to-late onset patients. Furthermore, the abnormal RFE pattern in MDD showed significant associations with neurotransmitter receptor/transporter profiles, particularly GABAa and mGluR5, suggesting a molecular basis for these findings. These results highlight abnormal regional functional efficiency and its neural correlates in MDD.
重度抑郁障碍(MDD)患者是否与异常的区域功能效率(RFE)相关尚不清楚。本研究旨在通过大型、多地点队列研究重度抑郁症中RFE异常模式及其神经相关因素。我们从1265名MDD患者和1094名匹配的健康对照(hc)的静息状态功能磁共振成像数据中计算体素方向的RFE。使用规范模型将原始RFE值转换为w分数,然后在MDD组和HC组之间进行比较。我们通过留一个位点和子样本验证方法验证了组间差异的可重复性。此外,我们研究了异常RFE模式与临床特征之间的关系,以及来自公共正电子发射断层扫描图谱的神经递质受体/转运体谱。我们的研究结果显示,MDD与小脑、丘脑、双侧背外侧前额叶皮层和额中下回的RFE增加有关,而后扣带、楔前叶、中央后回和梭状回的RFE减少有关。该异常模式与验证结果具有较高的空间相似性,表明可重复性。与中晚期发病患者相比,早发性MDD患者在双侧腹内侧前额叶皮层、双侧岛、左壳核、右尾状核和角回的RFE减少,同时小脑前叶、楔叶和楔前叶的RFE增加。此外,MDD患者的异常RFE模式与神经递质受体/转运蛋白谱,特别是GABAa和mGluR5有显著关联,这表明这些发现有分子基础。这些结果突出了MDD的异常区域功能效率及其神经相关。
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Progress in Neuro-Psychopharmacology & Biological Psychiatry
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