Neuropathology and Applied Neurobiology最新文献

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Hippocampal dentate granule cells in temporal lobe epilepsy: A morphometry and transcriptomic study. 颞叶癫痫中的海马齿状颗粒细胞:形态计量学和转录组学研究
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-10-01 DOI: 10.1111/nan.13008
Carolyn Twible, Rober Abdo, Chelsey Zhao, Qi Zhang
{"title":"Hippocampal dentate granule cells in temporal lobe epilepsy: A morphometry and transcriptomic study.","authors":"Carolyn Twible, Rober Abdo, Chelsey Zhao, Qi Zhang","doi":"10.1111/nan.13008","DOIUrl":"https://doi.org/10.1111/nan.13008","url":null,"abstract":"<p><p>The dentate gyrus (DG) plays a critical role in hippocampal circuitry, providing a \"gate-like\" function to the downstream cornu ammonis (CA) sectors. Despite this critical role, pathologies in DG are less commonly described than those in the CA sectors in the diagnosis of mesial temporal lobe epilepsy (mTLE). To elucidate the role of the DG in mTLE, we analysed hippocampal sclerosis (HS), no-HS, non-TLE epilepsy control, and non-epilepsy control cohorts using morphometry and gene expression profiling techniques. Morphometry techniques analysed DG cell spacing, nucleus size, and nucleus circularity. Our data show distinct DG morphometry and RNA expression profiles between HS and No-HS. Dentate granule cells are more dispersed in patients with HS, and the DG shows an elevated expression of the complement system, apoptosis, and extracellular matrix remodelling-related RNA. We also observe an overall decrease in neurogenesis-related RNA in HS DG. Interestingly, regardless of the pathological diagnosis, the DG morphometry correlates with post-operative outcomes. Increased cell spacing is observed in the DG of mTLE cases that achieve seizure freedom post-operatively. This study reveals the possible prognostic value of DG morphometry, as well as supporting the notion that HS and no-HS TLE may be distinct disease entities with differing contributing mechanisms.</p>","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 5","pages":"e13008"},"PeriodicalIF":4.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142392051","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
Characterisation of the tumour microenvironment in primary and recurrent glioblastomas. 原发性和复发性胶质母细胞瘤的肿瘤微环境特征。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-10-01 DOI: 10.1111/nan.13012
Arnon Møldrup Knudsen, Jesper Dupont Ewald, Vilde Pedersen, Martin Haupt-Jorgensen, Elisabeth Victoria Riber Hansen, Bjarne Winther Kristensen
{"title":"Characterisation of the tumour microenvironment in primary and recurrent glioblastomas.","authors":"Arnon Møldrup Knudsen, Jesper Dupont Ewald, Vilde Pedersen, Martin Haupt-Jorgensen, Elisabeth Victoria Riber Hansen, Bjarne Winther Kristensen","doi":"10.1111/nan.13012","DOIUrl":"https://doi.org/10.1111/nan.13012","url":null,"abstract":"<p><strong>Aims: </strong>Glioblastoma patients have a dismal prognosis, due to inevitable tumour recurrence and respond poorly to immunotherapy. Tumour-associated microglia/macrophages (TAMs) dominate the glioblastoma tumour microenvironment and have been implicated in tumour progression and immune evasion. Early recurrent glioblastomas contain focal reactive regions with occasional fibrosis, chronic inflammation, TAMs and tumour cells. Surgical specimens from these tumours are rare and provide crucial insights into glioblastoma recurrence biology. This study aimed to characterise TAM- and lymphocyte phenotypes in primary vs early- and late-recurrent glioblastomas.</p><p><strong>Methods: </strong>Patient-matched primary and recurrent glioblastomas were compared between patients with early recurrences (n = 11, recurrence ≤6 months) and late recurrences (n = 12, recurrence after 12-19 months). Double-immunofluorescence stains combining Iba1 with HLA-DR, CD14, CD68, CD74, CD86, CD163, CD204 and CD206 along with stains for CD20, CD3, CD8 and FOXP3 were quantified with software-based classifiers.</p><p><strong>Results: </strong>Reactive regions in early recurrent tumours contained more TAMs (31.4% vs 21.7%, P = 0.01), which showed increased expression of CD86 (59.4% vs 38.4%, P = 0.04), CD204 (48.5% vs 28.4%, P = 0.03), CD206 (25.5% vs 14.4%, P = 0.04) and increased staining intensity for CD163 (86.4 vs 57.7 arbitrary units, P = 0.02), compared to late recurring tumours. Reactive regions contained more B-lymphocytes compared to patient-matched primary tumours (0.71% vs 0.40%, P = 0.04). Fractions of total, cytotoxic and regulatory T-lymphocytes did not differ.</p><p><strong>Conclusions: </strong>Early recurrent glioblastomas showed enrichment for TAMs, expressing both pro- and anti-inflammatory markers and B-lymphocytes. This may indicate a time-dependent response to immunotherapy explained by time-dependent alterations in the immune-microenvironment in recurrent glioblastomas.</p>","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 5","pages":"e13012"},"PeriodicalIF":4.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504803","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
A reassessment of spinal cord pathology in severe infantile spinal muscular atrophy: Reassessment of spinal cord pathology. 重新评估严重婴儿脊髓性肌萎缩症的脊髓病理学:重新评估脊髓病理学。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-10-01 DOI: 10.1111/nan.13013
Hazel Allardyce, Benjamin D Lawrence, Thomas O Crawford, Charlotte J Sumner, Simon H Parson
{"title":"A reassessment of spinal cord pathology in severe infantile spinal muscular atrophy: Reassessment of spinal cord pathology.","authors":"Hazel Allardyce, Benjamin D Lawrence, Thomas O Crawford, Charlotte J Sumner, Simon H Parson","doi":"10.1111/nan.13013","DOIUrl":"10.1111/nan.13013","url":null,"abstract":"<p><strong>Aims: </strong>Spinal muscular atrophy (SMA) is a life-limiting paediatric motor neuron disease characterised by lower motor neuron loss, skeletal muscle atrophy and respiratory failure, if untreated. Revolutionary treatments now extend patient survival. However, a limited understanding of the foundational neuropathology challenges the evaluation of therapeutic success. As opportunities to study treatment-naïve tissue decrease, we have characterised spinal cord pathology in severe infantile SMA using gold-standard techniques, providing a baseline to measure treatment success and therapeutic limitations.</p><p><strong>Methods: </strong>Detailed histological analysis, stereology and transmission electron microscopy were applied to post-mortem spinal cord from severe infantile SMA patients to estimate neuron number at the end of life; characterise the morphology of ventral horn, lateral horn and Clarke's column neuron populations; assess cross-sectional spinal cord area; and observe myelinated white matter tracts in the clinically relevant thoracic spinal cord.</p><p><strong>Results: </strong>Ventral horn neuron loss was substantial in all patients, even the youngest cases. The remaining ventral horn neurons were small with abnormal, occasionally chromatolytic morphology, indicating cellular damage. In addition to ventral horn pathology, Clarke's column sensory-associated neurons displayed morphological features of cellular injury, in contrast to the preserved sympathetic lateral horn neurons. Cellular changes were associated with aberrant development of grey and white matter structures that affected the overall dimensions of the spinal cord.</p><p><strong>Conclusions: </strong>We provide robust quantification of the neuronal deficit found at the end of life in SMA spinal cord. We question long-accepted dogmas of SMA pathogenesis and shed new light on SMA neuropathology out with the ventral horn, which must be considered in future therapeutic design.</p>","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 5","pages":"e13013"},"PeriodicalIF":4.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504802","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
Alzheimer's disease clinical variants show distinct neuroinflammatory profiles with neuropathology. 阿尔茨海默病的临床变异与神经病理学显示出不同的神经炎症特征。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-10-01 DOI: 10.1111/nan.13009
Baayla D C Boon, Irene Frigerio, Danae de Gooijer, Tjado H J Morrema, John Bol, Yvon Galis-de Graaf, Martijn Heymans, Melissa E Murray, Sven J van der Lee, Henne Holstege, Wilma D J van de Berg, Laura E Jonkman, Annemieke J M Rozemuller, Femke H Bouwman, Jeroen J M Hoozemans
{"title":"Alzheimer's disease clinical variants show distinct neuroinflammatory profiles with neuropathology.","authors":"Baayla D C Boon, Irene Frigerio, Danae de Gooijer, Tjado H J Morrema, John Bol, Yvon Galis-de Graaf, Martijn Heymans, Melissa E Murray, Sven J van der Lee, Henne Holstege, Wilma D J van de Berg, Laura E Jonkman, Annemieke J M Rozemuller, Femke H Bouwman, Jeroen J M Hoozemans","doi":"10.1111/nan.13009","DOIUrl":"https://doi.org/10.1111/nan.13009","url":null,"abstract":"<p><strong>Aims: </strong>Although the neuroanatomical distribution of tau and amyloid-β is well studied in Alzheimer's disease (AD) (non)-amnestic clinical variants, that of neuroinflammation remains unexplored. We investigate the neuroanatomical distribution of activated myeloid cells, astrocytes, and complement alongside amyloid-β and phosphorylated tau in a clinically well-defined prospectively collected AD cohort.</p><p><strong>Methods: </strong>Clinical variants were diagnosed antemortem, and brain tissue was collected post-mortem. Typical AD (n = 10), behavioural/dysexecutive AD (n = 6), posterior cortical atrophy (PCA) AD (n = 3), and controls (n = 10) were neuropathologically assessed for AD neuropathology, concurrent pathology including Lewy body disease, limbic-predominant age-related TDP-43 encephalopathy neuropathologic change (LATE-NC), and vascular pathology. For quantitative assessment, we analysed the corticolimbic distribution of phosphorylated tau, amyloid-β, CD68, MHC-II, C4b, and glial fibrillary acidic protein (GFAP) using digital pathology.</p><p><strong>Results: </strong>Phosphorylated tau was distinctly distributed in each variant. In all variants, amyloid-β was neocortical-dominant, with a notable increase in the middle frontal cortex of behavioural/dysexecutive AD. Typical AD and PCA AD had no concurrent Lewy body disease, whereas three out of six cases with behavioural/dysexecutive AD did. LATE-NC stage >0 was observed in three AD cases, two typical AD (stage 1/3), and one behavioural/dysexecutive AD (stage 2/3). Vascular pathology was present in each variant. In typical AD, CD68 and MHC-II were hippocampal-dominant. In behavioural/dysexecutive AD, C4b was elevated in the middle frontal and inferior parietal cortex. In PCA AD, MHC-II was increased in the fusiform gyrus, and GFAP in parietal cortices. Correlations between AD neuropathology and neuroinflammation were distinct within variants.</p><p><strong>Conclusions: </strong>Our data suggests that different involvement of neuroinflammation may add to clinical heterogeneity in AD, which has implications for neuroinflammation-based biomarkers and future therapeutics.</p>","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 5","pages":"e13009"},"PeriodicalIF":4.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470823","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
DNA methylation-array interlaboratory comparison trial demonstrates highly reproducible paediatric CNS tumour classification across 13 international centres. DNA 甲基化阵列实验室间比较试验表明,13 个国际中心的儿科中枢神经系统肿瘤分类具有高度的可重复性。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-10-01 DOI: 10.1111/nan.13010
Mihaela Chirica, Philipp Jurmeister, Daniel Teichmann, Arend Koch, Eilís Perez, Simone Schmid, Michèle Simon, Pablo Hernáiz Driever, Carina Bodden, Cornelis M van Tilburg, Emily C Hardin, Cinzia Lavarino, Jürgen Hench, David Scheie, Jane Cryan, Ales Vicha, Francesca R Buttarelli, An Michiels, Christine Haberler, Paulette Barahona, Bastiaan B J Tops, Tom Jacques, Tore Stokland, Olaf Witt, David T W Jones, David Capper
{"title":"DNA methylation-array interlaboratory comparison trial demonstrates highly reproducible paediatric CNS tumour classification across 13 international centres.","authors":"Mihaela Chirica, Philipp Jurmeister, Daniel Teichmann, Arend Koch, Eilís Perez, Simone Schmid, Michèle Simon, Pablo Hernáiz Driever, Carina Bodden, Cornelis M van Tilburg, Emily C Hardin, Cinzia Lavarino, Jürgen Hench, David Scheie, Jane Cryan, Ales Vicha, Francesca R Buttarelli, An Michiels, Christine Haberler, Paulette Barahona, Bastiaan B J Tops, Tom Jacques, Tore Stokland, Olaf Witt, David T W Jones, David Capper","doi":"10.1111/nan.13010","DOIUrl":"10.1111/nan.13010","url":null,"abstract":"<p><strong>Aims: </strong>DNA methylation profiling, recently endorsed by the World Health Organisation (WHO) as a pivotal diagnostic tool for brain tumours, most commonly relies on bead arrays. Despite its widespread use, limited data exist on the technical reproducibility and potential cross-institutional differences. The LOGGIC Core BioClinical Data Bank registry conducted a prospective laboratory comparison trial with 12 international laboratories to enhance diagnostic accuracy for paediatric low-grade gliomas, focusing on technical aspects of DNA methylation data generation and profile interpretation under clinical real-time conditions.</p><p><strong>Methods: </strong>Four representative low-grade gliomas of distinct histologies were centrally selected, and DNA extraction was performed. Participating laboratories received a DNA aliquot and performed the DNA methylation-based classification and result interpretation without knowledge of tumour histology. Additionally, participants were required to interpret the copy number profile derived from DNA methylation data and conduct DNA sequencing of the BRAF hotspot p.V600 due to its relevance for low-grade gliomas. Results had to be returned within 30 days.</p><p><strong>Results: </strong>High technical reproducibility was observed, with a median pairwise correlation of 0.99 (range 0.94-0.99) between coordinating laboratory and participants. DNA methylation-based tumour classification and copy number profile interpretation were consistent across all centres, and BRAF mutation status was accurately reported for all cases. Eleven out of 12 centres successfully reported their analysis within the 30-day timeframe.</p><p><strong>Conclusion: </strong>Our study demonstrates remarkable concordance in DNA methylation profiling and profile interpretation across 12 international centres. These findings underscore the potential contribution of DNA methylation analysis to the harmonisation of brain tumour diagnostics.</p>","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 5","pages":"e13010"},"PeriodicalIF":4.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470824","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
TCF3::BEND2 in paediatric supratentorial tumour with carcinoma-like epithelial features classifying as MN1-altered astroblastoma by DNA methylation profiling. 通过DNA甲基化分析,发现小儿脑室上皮肿瘤中的TCF3::BEND2具有癌样上皮特征,可归类为MN1改变的星形母细胞瘤。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-10-01 DOI: 10.1111/nan.13011
Yoshiko Nakano, Sumihito Nobusawa, Aiko Sato-Otsubo, Takuma Nakashima, Hiromichi Suzuki, Kai Yamasaki, Takahiro Shirakura, Takeshi Inoue, Takahiro Okuno, Motohiro Kato, Koichi Ichimura, Hiroaki Sakamoto
{"title":"TCF3::BEND2 in paediatric supratentorial tumour with carcinoma-like epithelial features classifying as MN1-altered astroblastoma by DNA methylation profiling.","authors":"Yoshiko Nakano, Sumihito Nobusawa, Aiko Sato-Otsubo, Takuma Nakashima, Hiromichi Suzuki, Kai Yamasaki, Takahiro Shirakura, Takeshi Inoue, Takahiro Okuno, Motohiro Kato, Koichi Ichimura, Hiroaki Sakamoto","doi":"10.1111/nan.13011","DOIUrl":"https://doi.org/10.1111/nan.13011","url":null,"abstract":"","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 5","pages":"e13011"},"PeriodicalIF":4.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470825","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 molecular mechanisms that underlie IGHMBP2-related diseases. IGHMBP2 相关疾病的分子机制。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-08-01 DOI: 10.1111/nan.13005
Weronika Rzepnikowska, Joanna Kaminska, Andrzej Kochański
{"title":"The molecular mechanisms that underlie IGHMBP2-related diseases.","authors":"Weronika Rzepnikowska, Joanna Kaminska, Andrzej Kochański","doi":"10.1111/nan.13005","DOIUrl":"https://doi.org/10.1111/nan.13005","url":null,"abstract":"<p><p>Immunoglobulin Mu-binding protein 2 (IGHMBP2) pathogenic variants result in the fatal, neurodegenerative disease spinal muscular atrophy with respiratory distress type 1 (SMARD1) and the milder, Charcot-Marie-Tooth (CMT) type 2S (CMT2S) neuropathy. More than 20 years after the link between IGHMBP2 and SMARD1 was revealed, and 10 years after the discovery of the association between IGHMBP2 and CMT2S, the pathogenic mechanism of these diseases is still not well defined. The discovery that IGHMBP2 functions as an RNA/DNA helicase was an important step, but it did not reveal the pathogenic mechanism. Helicases are enzymes that use ATP hydrolysis to catalyse the separation of nucleic acid strands. They are involved in numerous cellular processes, including DNA repair and transcription; RNA splicing, transport, editing and degradation; ribosome biogenesis; translation; telomere maintenance; and homologous recombination. IGHMBP2 appears to be a multifunctional factor involved in several cellular processes that regulate gene expression. It is difficult to determine which processes, when dysregulated, lead to pathology. Here, we summarise our current knowledge of the clinical presentation of IGHMBP2-related diseases. We also overview the available models, including yeast, mice and cells, which are used to study the function of IGHMBP2 and the pathogenesis of the related diseases. Further, we discuss the structure of the IGHMBP2 protein and its postulated roles in cellular functioning. Finally, we present potential anomalies that may result in the neurodegeneration observed in IGHMBP2-related disease and highlight the most prominent ones.</p>","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 4","pages":"e13005"},"PeriodicalIF":4.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141907233","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
A case of glioneuronal tumour with ATRX alteration, kinase fusion and anaplastic features showing rapid ependymal and leptomeningeal dissemination. 一例胶质细胞瘤,伴有ATRX改变、激酶融合和异常增生特征,表现为快速上皮和脑膜播散。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-08-01 DOI: 10.1111/nan.13001
Evelina Miele, Sabina Barresi, Giovanna Stefania Colafati, Lucia Pedace, Antonello Cardoni, Claudia Nardini, Chantal Tancredi, Sara Patrizi, Giada Del Baldo, Giacomina Megaro, Carmine Franco Muccio, Philipp Sievers, Rita Alaggio, Angela Mastronuzzi, Sabrina Rossi, Franco Locatelli
{"title":"A case of glioneuronal tumour with ATRX alteration, kinase fusion and anaplastic features showing rapid ependymal and leptomeningeal dissemination.","authors":"Evelina Miele, Sabina Barresi, Giovanna Stefania Colafati, Lucia Pedace, Antonello Cardoni, Claudia Nardini, Chantal Tancredi, Sara Patrizi, Giada Del Baldo, Giacomina Megaro, Carmine Franco Muccio, Philipp Sievers, Rita Alaggio, Angela Mastronuzzi, Sabrina Rossi, Franco Locatelli","doi":"10.1111/nan.13001","DOIUrl":"10.1111/nan.13001","url":null,"abstract":"","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 4","pages":"e13001"},"PeriodicalIF":4.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141731318","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
Ageing-related tau astrogliopathy severely affecting the substantia nigra. 与衰老相关的 tau 星形胶质细胞病变严重影响黑质。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-08-01 DOI: 10.1111/nan.13000
Hidetomo Tanaka, Seojin Lee, Ivan Martinez-Valbuena, Blas Couto, Maria Carmela Tartaglia, Javier Sanchez-Ruiz de Gordoa, M Elena Erro, Anthony E Lang, Shelley L Forrest, Gabor G Kovacs
{"title":"Ageing-related tau astrogliopathy severely affecting the substantia nigra.","authors":"Hidetomo Tanaka, Seojin Lee, Ivan Martinez-Valbuena, Blas Couto, Maria Carmela Tartaglia, Javier Sanchez-Ruiz de Gordoa, M Elena Erro, Anthony E Lang, Shelley L Forrest, Gabor G Kovacs","doi":"10.1111/nan.13000","DOIUrl":"10.1111/nan.13000","url":null,"abstract":"<p><strong>Aims: </strong>Astrocytic tau pathology is a major feature of tauopathies and ageing-related tau astrogliopathy (ARTAG). The substantia nigra (SN) is one of the important degenerative areas in tauopathies with parkinsonism. Nigral tau pathology is usually reported as neuronal predominant with less prominent astrocytic involvement. We aimed to identify cases with prominent astrocytic tau pathology in the SN.</p><p><strong>Methods: </strong>We use the term nigral tau-astrogliopathy (NITAG) to describe cases showing an unusually high density of ARTAG with less neuronal tau pathology in the SN. We collected clinical information and studied the distribution of tau pathology, morphological features and immunostaining profiles in three cases.</p><p><strong>Results: </strong>Three cases, all males with parkinsonism, were identified with the following clinicopathological diagnoses: (i) atypical parkinsonism with tau pathology reminiscent to that in postencephalitic parkinsonism (69-year-old); (ii) multiple system atrophy (73-year-old); (iii) traumatic encephalopathy syndrome/chronic traumatic encephalopathy (84-year-old). Double-labelling immunofluorescence confirmed co-localization of GFAP and phosphorylated tau in affected astrocytes. Staining profiles of NITAG revealed immunopositivity for various phosphorylated tau antibodies. Some astrocytic tau lesions were also seen in other brainstem regions and cerebral grey matter.</p><p><strong>Conclusions: </strong>We propose NITAG is a rare neuropathological feature, and not a distinct disease entity, in the frame of multiple system ARTAG, represented by abundant tau-positive astrocytes in various brain regions but having the highest density in the SN. The concept of NITAG allows the stratification of cases with various background pathologies to understand its relevance and contribution to neuronal dysfunction.</p>","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 4","pages":"e13000"},"PeriodicalIF":4.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141734722","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
Synaptic gene expression changes in frontotemporal dementia due to the MAPT 10 + 16 mutation. MAPT 10 + 16 突变导致额颞叶痴呆症的突触基因表达变化。
IF 4 2区 医学
Neuropathology and Applied Neurobiology Pub Date : 2024-08-01 DOI: 10.1111/nan.13006
Owen Dando, Robert McGeachan, Jamie McQueen, Paul Baxter, Nathan Rockley, Hannah McAlister, Adharsh Prasad, Xin He, Declan King, Jamie Rose, Phillip B Jones, Jane Tulloch, Siddharthan Chandran, Colin Smith, Giles Hardingham, Tara L Spires-Jones
{"title":"Synaptic gene expression changes in frontotemporal dementia due to the MAPT 10 + 16 mutation.","authors":"Owen Dando, Robert McGeachan, Jamie McQueen, Paul Baxter, Nathan Rockley, Hannah McAlister, Adharsh Prasad, Xin He, Declan King, Jamie Rose, Phillip B Jones, Jane Tulloch, Siddharthan Chandran, Colin Smith, Giles Hardingham, Tara L Spires-Jones","doi":"10.1111/nan.13006","DOIUrl":"10.1111/nan.13006","url":null,"abstract":"<p><strong>Aims: </strong>Mutations in the MAPT gene encoding tau protein can cause autosomal dominant neurodegenerative tauopathies including frontotemporal dementia (often with Parkinsonism). In Alzheimer's disease, the most common tauopathy, synapse loss is the strongest pathological correlate of cognitive decline. Recently, Positron Emission Tomography (PET) imaging with synaptic tracers revealed clinically relevant loss of synapses in primary tauopathies; however, the molecular mechanisms leading to synapse degeneration in primary tauopathies remain largely unknown. In this study, we examined post-mortem brain tissue from people who died with frontotemporal dementia with tau pathology (FTDtau) caused by the MAPT intronic exon 10 + 16 mutation, which increases splice variants containing exon 10 resulting in higher levels of tau with four microtubule-binding domains.</p><p><strong>Methods: </strong>We used RNA sequencing and histopathology to examine temporal cortex and visual cortex, to look for molecular phenotypes compared to age, sex and RNA integrity matched participants who died without neurological disease (n = 12 FTDtau10 + 16 and 13 controls).</p><p><strong>Results: </strong>Bulk tissue RNA sequencing reveals substantial downregulation of gene expression associated with synaptic function. Upregulated biological pathways in human MAPT 10 + 16 brain included those involved in transcriptional regulation, DNA damage response and neuroinflammation. Histopathology confirmed increased pathological tau accumulation in FTDtau10 + 16 cortex as well as a loss of presynaptic protein staining and region-specific increased colocalization of phospho-tau with synapses in temporal cortex.</p><p><strong>Conclusions: </strong>Our data indicate that synaptic pathology likely contributes to pathogenesis in FTDtau10 + 16 caused by the MAPT 10 + 16 mutation.</p>","PeriodicalId":19151,"journal":{"name":"Neuropathology and Applied Neurobiology","volume":"50 4","pages":"e13006"},"PeriodicalIF":4.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142009134","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}
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