Experimental Neurology最新文献

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CXCR2 mediated trafficking of neutrophils and neutrophil extracellular traps are required for myelin clearance after a peripheral nerve injury 中性粒细胞和中性粒细胞胞外捕获物在外周神经损伤后的髓鞘清除过程中需要由 CXCR2 介导的中性粒细胞和中性粒细胞胞外捕获物的迁移。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-10-03 DOI: 10.1016/j.expneurol.2024.114985
Brian M. Balog, Jon P. Niemi, Thomas Disabato, Faye Hashim, Richard E. Zigmond
{"title":"CXCR2 mediated trafficking of neutrophils and neutrophil extracellular traps are required for myelin clearance after a peripheral nerve injury","authors":"Brian M. Balog,&nbsp;Jon P. Niemi,&nbsp;Thomas Disabato,&nbsp;Faye Hashim,&nbsp;Richard E. Zigmond","doi":"10.1016/j.expneurol.2024.114985","DOIUrl":"10.1016/j.expneurol.2024.114985","url":null,"abstract":"<div><div>Neutrophils are a vital part of the innate immune system. Many of their functions eliminate bacteria &amp; viruses, like neutrophil extracellular traps (NETs), which trap bacteria, enhancing macrophage phagocytosis. It was surprising when it was demonstrated that neutrophils are a part of Wallerian degeneration, a process that is essential for nerve regeneration after a nerve injury. It is not known what signals attract neutrophils into the nerve and how they aid Wallerian degeneration. Neutrophils accumulate in the distal nerve within one day after an injury and are found in the nerve from one to three days. We demonstrate that CXCR2 mediates the trafficking of neutrophils into the distal nerve, and without CXCR2 Wallerian degeneration, as indicated by luxol fast blue staining, was reduced seven days after a sciatic nerve crush or transection injury. NETs were detected in the distal nerve after a sciatic nerve transection. NET formation has been shown to require protein arginine deiminase 4 (PAD4), which citrullinates histone 3. Inhibiting PAD4 reduced NET formation significantly in the distal nerve at two days and myelin clearance at seven days indicating that NETs aid myelin clearance. These results demonstrate another function for NETs other than clearing pathogens. Neutrophils have been detected after injuries to the central nervous system and diseases in humans and animal models. Our results demonstrate neutrophils aid myelin clearance, suggesting a role for their presence in central nervous system injuries and diseases.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142377830","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
Neuro-inflammatory pathways in COVID-19-induced central nervous system injury: Implications for prevention and treatment strategies COVID-19 诱导的中枢神经系统损伤中的神经炎症途径:对预防和治疗策略的影响
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-10-03 DOI: 10.1016/j.expneurol.2024.114984
Muhammad Liaquat Raza , Mustafa Hussain Imam , Warisha Zehra , Subia Jamil
{"title":"Neuro-inflammatory pathways in COVID-19-induced central nervous system injury: Implications for prevention and treatment strategies","authors":"Muhammad Liaquat Raza ,&nbsp;Mustafa Hussain Imam ,&nbsp;Warisha Zehra ,&nbsp;Subia Jamil","doi":"10.1016/j.expneurol.2024.114984","DOIUrl":"10.1016/j.expneurol.2024.114984","url":null,"abstract":"<div><div>This review explores the neuroinflammatory pathways underlying COVID-19-induced central nervous system (CNS) injury, with a focus on mechanisms of brain damage and strategies for prevention. A comprehensive literature review was conducted to summarize current knowledge on the pathways by which SARS-CoV-2 reaches the brain, the neuroinflammatory responses triggered by viral infection, neurological symptoms and long COVID. Results: We discuss the mechanisms of neuroinflammation in COVID-19, including blood-brain barrier disruption, cytokine storm, microglial activation, and peripheral immune cell infiltration. Additionally, we highlight potential strategies for preventing CNS injury, including pharmacological interventions, immunomodulatory therapies, and lifestyle modifications. Conclusively, Understanding the neuroinflammatory pathways in COVID-19-induced CNS injury is crucial for developing effective prevention and treatment strategies to protect brain health during and after viral infection.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142377832","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
Nerve injury converts Schwann cells in a long-term repair-like state in human neuroma tissue 神经损伤使人类神经瘤组织中的许旺细胞转变为长期修复样状态。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-10-01 DOI: 10.1016/j.expneurol.2024.114981
Stefanie Deininger , Jakob Schumacher , Anna Blechschmidt , Jialei Song , Claudia Klugmann , Gregor Antoniadis , Maria Pedro , Bernd Knöll , Sofia Meyer zu Reckendorf
{"title":"Nerve injury converts Schwann cells in a long-term repair-like state in human neuroma tissue","authors":"Stefanie Deininger ,&nbsp;Jakob Schumacher ,&nbsp;Anna Blechschmidt ,&nbsp;Jialei Song ,&nbsp;Claudia Klugmann ,&nbsp;Gregor Antoniadis ,&nbsp;Maria Pedro ,&nbsp;Bernd Knöll ,&nbsp;Sofia Meyer zu Reckendorf","doi":"10.1016/j.expneurol.2024.114981","DOIUrl":"10.1016/j.expneurol.2024.114981","url":null,"abstract":"<div><div>Peripheral nerve injury (PNI) induces neuroma formation at the severed nerve stump resulting in impaired nerve regeneration and functional recovery in patients. So far, molecular mechanisms and cell types present in the neuroma impeding on regeneration have only sparsely been analyzed. Herein we compare resected human neuroma tissue with intact donor nerves from the same patient. Neuroma from several post-injury timepoints (1–13 months) were included, thereby allowing for temporal correlation with molecular and cellular processes. We observed reduced axonal area and percentage of myelin producing Schwann cells (SCs) compared to intact nerves. However, total SOX10 positive SC numbers were comparable. Notably, markers for SCs in a repair mode including c-JUN, the low-affinity neurotrophin receptor (NTR) p75, SHH (sonic hedgehog) and SC proliferation (phospho-histone H3) were upregulated in neuroma, suggesting presence of SCs in repair status. In agreement, in neuroma, pro-regenerative markers such as phosphorylated i.e. activated CREB (pCREB), ATF3, GAP43 and SCG10 were upregulated. In addition, neuroma tissue was infiltrated by several types of macrophages. Finally, when taken in culture, neuroma SCs were indistinguishable from controls SCs with regard to proliferation and morphology. However, cultured neuroma SCs retained a different molecular signature from control SCs including increased inflammation and reduced gene expression for differentiation markers such as myelin genes.</div><div>In summary, human neuroma tissue consists of SCs with a repair status and is infiltrated strongly by several types of macrophages.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142371410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Knockout of neutrophil cytosolic factor 1 ameliorates neuroinflammation and motor deficit after traumatic brain injury 敲除中性粒细胞胞浆因子1可改善创伤性脑损伤后的神经炎症和运动障碍。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-09-30 DOI: 10.1016/j.expneurol.2024.114983
Tian-Xu Gao , Yu Liang , Jian Li , Dan Zhao , Bai-Jun Dong , Chen Xu , Wei-Dong Zhao , Xia Li , Chuan-Sheng Zhao
{"title":"Knockout of neutrophil cytosolic factor 1 ameliorates neuroinflammation and motor deficit after traumatic brain injury","authors":"Tian-Xu Gao ,&nbsp;Yu Liang ,&nbsp;Jian Li ,&nbsp;Dan Zhao ,&nbsp;Bai-Jun Dong ,&nbsp;Chen Xu ,&nbsp;Wei-Dong Zhao ,&nbsp;Xia Li ,&nbsp;Chuan-Sheng Zhao","doi":"10.1016/j.expneurol.2024.114983","DOIUrl":"10.1016/j.expneurol.2024.114983","url":null,"abstract":"<div><div>Traumatic brain injury (TBI) is a predominant cause of long-term disability in adults, yet the molecular mechanisms underpinning the neuropathological processes associated with it remain inadequately understood. Neutrophil cytosolic factor 1 (NCF1, also known as p47<sup>phox</sup>) is one of the cytosolic components of NADPH oxidase NOX2. In this study, we observed a reduction in the volume of TBI-induced brain lesions in NCF1-knockout mice compared to controls. Correspondingly, the neuronal loss induced by TBI was mitigated in the NCF1-knockout mice. Behavioral analysis also demonstrated that the motor coordination deficit following TBI was mitigated by the depletion of NCF1. Mechanistically, our findings revealed that NCF1 deficiency attenuated TBI-induced inflammatory responses by inhibiting the release of proinflammatory factors and reducing neutrophil infiltration into the brain parenchyma. Additionally, our results indicated that NCF1 deficiency significantly decreased the levels of reactive oxygen species in neutrophils. Taken together, our findings indicate that NCF1 plays a crucial role in the regulation of brain injury and secondary inflammation post-TBI.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364966","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 GENESIS database and tools: A decade of discovery in Mendelian genomics GENESIS 数据库和工具:孟德尔基因组学的十年发现。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-09-30 DOI: 10.1016/j.expneurol.2024.114978
Matt C. Danzi , Eric Powell , Adriana P. Rebelo , Maike F. Dohrn , Danique Beijer , Sarah Fazal , Isaac R.L. Xu , Jessica Medina , Sitong Chen , Yeisha Arcia de Jesus , Jacquelyn Schatzman , Ray E. Hershberger , Mario Saporta , Jonathan Baets , Marni Falk , David N. Herrmann , Steven S. Scherer , Mary M. Reilly , Andrea Cortese , Wilson Marques , Stephan Zuchner
{"title":"The GENESIS database and tools: A decade of discovery in Mendelian genomics","authors":"Matt C. Danzi ,&nbsp;Eric Powell ,&nbsp;Adriana P. Rebelo ,&nbsp;Maike F. Dohrn ,&nbsp;Danique Beijer ,&nbsp;Sarah Fazal ,&nbsp;Isaac R.L. Xu ,&nbsp;Jessica Medina ,&nbsp;Sitong Chen ,&nbsp;Yeisha Arcia de Jesus ,&nbsp;Jacquelyn Schatzman ,&nbsp;Ray E. Hershberger ,&nbsp;Mario Saporta ,&nbsp;Jonathan Baets ,&nbsp;Marni Falk ,&nbsp;David N. Herrmann ,&nbsp;Steven S. Scherer ,&nbsp;Mary M. Reilly ,&nbsp;Andrea Cortese ,&nbsp;Wilson Marques ,&nbsp;Stephan Zuchner","doi":"10.1016/j.expneurol.2024.114978","DOIUrl":"10.1016/j.expneurol.2024.114978","url":null,"abstract":"<div><div>In the past decade, human genetics research saw an acceleration of disease gene discovery and further dissection of the genetic architectures of many disorders. Much of this progress was enabled via data aggregation projects, collaborative data sharing among researchers, and the adoption of sophisticated and standardized bioinformatics analyses pipelines. In 2012, we launched the GENESIS platform, formerly known as GEM.app, with the aims to 1) empower clinical and basic researchers without bioinformatics expertise to analyze and explore genome level data and 2) facilitate the detection of novel pathogenic variation and novel disease genes by leveraging data aggregation and genetic matchmaking. The GENESIS database has grown to over 20,000 datasets from rare disease patients, which were provided by multiple academic research consortia and many individual investigators. Some of the largest global collections of genome-level data are available for Charcot-Marie-Tooth disease, hereditary spastic paraplegia, and cerebellar ataxia. A number of rare disease consortia and networks are archiving their data in this database. Over the past decade, more than 1500 scientists have registered and used this resource and published over 200 papers on gene and variant identifications, which garnered &gt;6000 citations. GENESIS has supported &gt;100 gene discoveries and contributed to approximately half of all gene identifications in the fields of inherited peripheral neuropathies and spastic paraplegia in this time frame. Many diagnostic odysseys of rare disease patients have been resolved. The concept of genomes-to-therapy has borne out for a number of such discoveries that let to rapid clinical trials and expedited natural history studies. This marks GENESIS as one of the most impactful data aggregation initiatives in rare monogenic diseases.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364968","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
Reactive astrocytes generated from human iPSC are pro-inflammatory and display altered metabolism 由人类 iPSC 生成的反应性星形胶质细胞具有促炎作用,并显示出新陈代谢的改变。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-09-30 DOI: 10.1016/j.expneurol.2024.114979
Sarah F. McComish , Julia O’Sullivan , Adina Mac Mahon Copas , Magdalena Imiolek , Noreen T. Boyle , Lucy A. Crompton , Jon D. Lane , Maeve A. Caldwell
{"title":"Reactive astrocytes generated from human iPSC are pro-inflammatory and display altered metabolism","authors":"Sarah F. McComish ,&nbsp;Julia O’Sullivan ,&nbsp;Adina Mac Mahon Copas ,&nbsp;Magdalena Imiolek ,&nbsp;Noreen T. Boyle ,&nbsp;Lucy A. Crompton ,&nbsp;Jon D. Lane ,&nbsp;Maeve A. Caldwell","doi":"10.1016/j.expneurol.2024.114979","DOIUrl":"10.1016/j.expneurol.2024.114979","url":null,"abstract":"<div><div>Astrocytes are the most abundant type of glial cell in the central nervous system and they play pivotal roles in both normal health and disease. Their dysfunction is detrimental to many brain related pathologies. Under pathological conditions, such as Alzheimer's disease, astrocytes adopt an activated reactive phenotype which can contribute to disease progression. A prominent risk factor for many neurodegenerative diseases is neuroinflammation which is the purview of glial cells, such as astrocytes and microglia. Human <em>in vitro</em> models have the potential to reveal relevant disease specific mechanisms, through the study of individual cell types such as astrocytes or the addition of specific factors, such as those secreted by microglia. The aim of this study was to generate human cortical astrocytes, in order to assess their protein and gene expression, examine their reactivity profile in response to exposure to the microglial secreted factors IL-1α, TNFα and C1q and assess their functionality in terms of calcium signalling and metabolism. They successfully differentiate and stimulated reactive astrocytes display increased IL-6, RANTES and GM-CSF secretion, and increased expression of genes associated with reactivity including, <em>IL-6</em>, <em>ICAM1</em>, <em>LCN2</em>, <em>C3</em> and <em>SERPINA3</em>. Functional assessment of these reactive astrocytes showed a delayed and sustained calcium response to ATP and a concomitant decrease in the expression of connexin–43. Furthermore, it was demonstrated these astrocytes had an increased glycolytic capacity with no effect on oxidative phosphorylation. These findings not only increase our understanding of astrocyte reactivity but also provides a functional platform for drug discovery.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364967","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
Deferoxamine alleviates ferroptosis in seawater immersion combined with traumatic brain injury 去铁胺可减轻海水浸泡合并脑外伤时的铁变态反应。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-09-30 DOI: 10.1016/j.expneurol.2024.114977
Shengqiang Xie , Hanbo Zhang , Gang Cheng , Bingxian Wang , Yanteng Li , Xiaowen Xing , Cui Wang , Mengwen Song , Zengqiang Yuan , Zhiqiang Liu , Jianning Zhang
{"title":"Deferoxamine alleviates ferroptosis in seawater immersion combined with traumatic brain injury","authors":"Shengqiang Xie ,&nbsp;Hanbo Zhang ,&nbsp;Gang Cheng ,&nbsp;Bingxian Wang ,&nbsp;Yanteng Li ,&nbsp;Xiaowen Xing ,&nbsp;Cui Wang ,&nbsp;Mengwen Song ,&nbsp;Zengqiang Yuan ,&nbsp;Zhiqiang Liu ,&nbsp;Jianning Zhang","doi":"10.1016/j.expneurol.2024.114977","DOIUrl":"10.1016/j.expneurol.2024.114977","url":null,"abstract":"<div><div>Traumatic brain injury (TBI) is a major cause of death and disability worldwide, with its severity potentially exacerbated by seawater immersion. Ferroptosis, a form of regulated cell death driven by iron-dependent lipid peroxidation, has been implicated in TBI pathogenesis. However, the specific occurrence and underlying mechanisms of ferroptosis in the context of TBI compounded by seawater immersion remain unclear. Subsequently, we investigated the effects of seawater immersion on ferroptosis after the application of deferoxamine (DFO), an iron chelator and ferroptosis inhibitor, to explore its potential therapeutic value. We conducted RNA sequencing, protein expression analysis, oxidative stress assessment, histopathological examination, and behavioral testing to comprehensively evaluate the impact of DFO on ferroptosis and neurological outcomes. Our results demonstrated that seawater immersion significantly exacerbated ferroptosis in TBI. DFO treatment, however, attenuated ferroptosis, alleviated oxidative stress, reduced brain tissue damage, improved neuronal survival, and promoted motor function recovery. Despite these benefits, DFO exhibited limited effects on anxiety, novel object recognition, and spatial learning and memory. These findings suggest that ferroptosis represents a novel pathological mechanism in TBI under seawater immersion, and that DFO is a promising neuroprotective agent capable of modulating ferroptosis and enhancing neurological function. This study offers new insights into the complex injury conditions associated with TBI and seawater immersion, highlighting the potential of targeting ferroptosis for therapeutic intervention.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364965","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
Transforming personalized chronic pain management with artificial intelligence: A commentary on the current landscape and future directions 用人工智能改变个性化慢性疼痛管理:对当前形势和未来方向的评论。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-09-29 DOI: 10.1016/j.expneurol.2024.114980
Stefano Casarin , Nele A. Haelterman , Keren Machol
{"title":"Transforming personalized chronic pain management with artificial intelligence: A commentary on the current landscape and future directions","authors":"Stefano Casarin ,&nbsp;Nele A. Haelterman ,&nbsp;Keren Machol","doi":"10.1016/j.expneurol.2024.114980","DOIUrl":"10.1016/j.expneurol.2024.114980","url":null,"abstract":"<div><div>Artificial intelligence (AI) has the potential to revolutionize chronic pain management by guiding the development of effective treatment strategies that are tailored to individual patient needs. This potential comes from AI's ability to analyze large and heterogeneous datasets to identify hidden patterns. When applied to clinical datasets of a particular patient population, AI can be used to identify pain subtypes among patients, predict treatment responses, and guide the clinical decision-making process. However, integrating AI into the clinical practice requires overcoming challenges such as data quality, the complexity of human pain physiology, and validation against diverse patient populations. Targeted, collaborative efforts among clinicians, researchers, and AI specialists will be needed to maximize AI's capabilities and advance current management and treatment of chronic pain conditions.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Genetic deletion of the apoptosis associated speck like protein containing a card in LysM+ macrophages attenuates spinal cord injury by regulating M1/M2 polarization through ASC-dependent inflammasome signaling axis 在 LysM+ 巨噬细胞中遗传性缺失含有卡片的凋亡相关斑点样蛋白,可通过 ASC 依赖性炎症小体信号轴调节 M1/M2 极化,从而减轻脊髓损伤。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-09-29 DOI: 10.1016/j.expneurol.2024.114982
Shu-Qin Ding , Hua-Zheng Yan , Jian-Xiong Gao , Yu-Qing Chen , Nan Zhang , Rui Wang , Jiang-Yan Li , Jian-Guo Hu , He-Zuo Lü
{"title":"Genetic deletion of the apoptosis associated speck like protein containing a card in LysM+ macrophages attenuates spinal cord injury by regulating M1/M2 polarization through ASC-dependent inflammasome signaling axis","authors":"Shu-Qin Ding ,&nbsp;Hua-Zheng Yan ,&nbsp;Jian-Xiong Gao ,&nbsp;Yu-Qing Chen ,&nbsp;Nan Zhang ,&nbsp;Rui Wang ,&nbsp;Jiang-Yan Li ,&nbsp;Jian-Guo Hu ,&nbsp;He-Zuo Lü","doi":"10.1016/j.expneurol.2024.114982","DOIUrl":"10.1016/j.expneurol.2024.114982","url":null,"abstract":"<div><div>Apoptosis associated speck like protein containing a card (ASC), the key adaptor protein of the assembly and activation of canonical inflammasomes, has been found to play a significant role in neuroinflammation after spinal cord injury (SCI). The previous studies indicated that widely block or knockout ASC can ameliorate SCI. However, ASC is ubiquitously expressed in infiltrated macrophages and local microglia, so further exploration is needed on which type of cell playing the key role. In this study, using the LysM<sup>cre</sup>;Asc<sup>flox/flox</sup> mice with macrophage-specifc ASC conditional knockout (CKO) and contusive SCI model, we focus on evaluating the specific role of ASC in lysozyme 2 (LysM)<sup>+</sup> myeloid cells (mainly infiltrated macrophages) in this pathology. The results revealed that macrophage-specifc Asc CKO exhibited the follow effects: (1) A significant reduction in the numbers of infiltrated macrophages in the all phases of SCI, and activated microglia in the acute and subacute phases. (2) A significant reduction in ASC, caspase-1, interleukin (IL)-1β, and IL-18 compared to control mice. (3) In the acute and subacute phases of SCI, M1 subset differentiation was inhibited, and M2 differentiation was increased. (4) Histology and hindlimb motor recoveries were improved. In conclusion, this study elucidates that macrophage-specific ASC CKO can improve nerve function recovery after SCI by regulating M1/M2 polarization through inhibiting ASC-dependent inflammasome signaling axis. This indicates that ASC in peripheral infiltrated macrophages may play an important role in SCI pathology, at least in mice, could be a potential target for treatment.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364970","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
Gene deletion of Pregnancy-associated Plasma Protein-A (PAPP-A) improves pathology and cognition in an Alzheimer's disease mouse model 妊娠相关血浆蛋白-A(PAPP-A)基因缺失可改善阿尔茨海默病小鼠模型的病理学和认知能力。
IF 4.6 2区 医学
Experimental Neurology Pub Date : 2024-09-28 DOI: 10.1016/j.expneurol.2024.114976
Laurie K. Bale , Sally A. West , Naomi M. Gades , Darren J. Baker , Cheryl A. Conover
{"title":"Gene deletion of Pregnancy-associated Plasma Protein-A (PAPP-A) improves pathology and cognition in an Alzheimer's disease mouse model","authors":"Laurie K. Bale ,&nbsp;Sally A. West ,&nbsp;Naomi M. Gades ,&nbsp;Darren J. Baker ,&nbsp;Cheryl A. Conover","doi":"10.1016/j.expneurol.2024.114976","DOIUrl":"10.1016/j.expneurol.2024.114976","url":null,"abstract":"<div><div>Alzheimer's disease (AD) is a progressive neurodegenerative disease of age with no effective preventative or treatment approaches. Deeper understanding of the mechanisms underlying the accumulation of toxic β-amyloid oligopeptides and the formation of amyloid plaque in AD has the potential to identify new therapeutic targets. Prior research links the insulin-like growth factor (IGF) system to pathologic mechanisms underlying AD. Suppression of local IGF-I receptor (IGF<img>IR) signaling in AD mice has been shown to reduce plaque formation in the brain and delay neurodegeneration and behavioral changes. However, direct inhibitors of IGF<img>IR signaling are not a viable treatment option for AD due to the essentiality of the IGF<img>IR in physiological growth and metabolism. We have previously demonstrated a more selective means to reduce local IGF<img>IR signaling through inhibition of PAPP-A, a novel zinc metalloprotease that regulates local IGF-I bioavailability through cleavage of inhibitory IGF binding proteins. Here we tested if deletion of PAPP-A in a mouse model of AD provides protection against pathology and behavioral changes. We show that compared to AD mice, AD/PAPP-A KO mice had significantly less plaque burden, reduced astrocytic activation, decreased IGF-IR activity, and improved cognition. Human senile AD plaques showed specific immunostaining for PAPP-A. Thus, inhibition of PAPP-A expression or activity may represent a novel treatment strategy for AD.</div></div>","PeriodicalId":12246,"journal":{"name":"Experimental Neurology","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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