Liangping Zhang MSc, Xizhuo Zhou MSc, Shuqiang Cha MSc
{"title":"Comprehensive Analysis of Sex Differences in Amyotrophic Lateral Sclerosis Prognosis and Disease Progression","authors":"Liangping Zhang MSc, Xizhuo Zhou MSc, Shuqiang Cha MSc","doi":"10.1002/ana.27092","DOIUrl":"10.1002/ana.27092","url":null,"abstract":"","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":"96 5","pages":"1028"},"PeriodicalIF":8.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Miranda L Messmer, Hannah E Salapa, Bogdan F Popescu, Michael C Levin
{"title":"RNA Binding Protein Dysfunction Links Smoldering/Slowly Expanding Lesions to Neurodegeneration in Multiple Sclerosis.","authors":"Miranda L Messmer, Hannah E Salapa, Bogdan F Popescu, Michael C Levin","doi":"10.1002/ana.27114","DOIUrl":"https://doi.org/10.1002/ana.27114","url":null,"abstract":"<p><strong>Objective: </strong>Despite the advances in treatments for multiple sclerosis (MS), unremitting neurodegeneration continues to drive disability and disease progression. Smoldering/slowly expanding lesions (SELs) and dysfunction of the RNA binding protein (RBP) heterogeneous nuclear ribonucleoprotein A1 (hnRNP A1) are pathologic hallmarks of MS cortex and intricately tied to disability and neurodegeneration, respectively. We hypothesized that neuronal hnRNP A1 dysfunction contributes to neurodegeneration and is exacerbated by smoldering/SELs in progressive MS.</p><p><strong>Methods: </strong>Neuronal hnRNP A1 pathology (nucleocytoplasmic mislocalization of hnRNP A1) was examined in healthy control and MS brains using immunohistochemistry. MS cases were stratified by severity of hnRNP A1 pathology to examine the link between RBP dysfunction, demyelination, and neurodegeneration.</p><p><strong>Results: </strong>We found that smoldering/SELs were only present within a subset of MS tissues characterized by elevated neuronal hnRNP A1 pathology (MS-A1<sup>high</sup>) in adjacent cortical gray matter. In contrast to healthy controls and MS with low hnRNP A1 pathology (MS-A1<sup>low</sup>), MS-A1<sup>high</sup> showed elevated markers of neurodegeneration, including neuronal loss and injury, brain atrophy, axonal loss, and axon degeneration. Additionally, we discovered a subpopulation of morphologically intact neurons lacking expression of NeuN, a neuron-specific RBP, in cortical projection neurons in MS-A1<sup>high</sup> cases.</p><p><strong>Interpretation: </strong>hnRNP A1 dysfunction contributes to neurodegeneration and may be exacerbated by smoldering/SELs in progressive MS. The discovery of NeuN-negative neurons suggests that some cortical neurons may only be injured and not lost. By characterizing RBP pathology in MS cortex, this study has important implications for understanding the pathogenic mechanisms driving neurodegeneration, the substrate of disability and disease progression. ANN NEUROL 2024.</p>","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
James J M Cooper, Rupadevi Muthaiah, Jon R Frost, Gregory T Buck, Roopa Ravichandar, Farah Gadelkarim, Faye D Raymond, Fraser J Sim
{"title":"Clemastine Induces Oligodendrocyte Progenitor Pool Exhaustion and Senescence in the Context of Chronic Demyelination in a Rabbit Model.","authors":"James J M Cooper, Rupadevi Muthaiah, Jon R Frost, Gregory T Buck, Roopa Ravichandar, Farah Gadelkarim, Faye D Raymond, Fraser J Sim","doi":"10.1002/ana.27098","DOIUrl":"https://doi.org/10.1002/ana.27098","url":null,"abstract":"<p><strong>Objectives: </strong>Clemastine has emerged as a promising therapy for the restoration of neurologic function in patients with multiple sclerosis (MS). However, clemastine and other agents with prodifferentiative effects on oligodendrocyte progenitor cells (OPCs) in rodent models have underperformed in clinical trials. We hypothesized that the preclinical studies showed more robust effects because of the abundance of OPCs in rodent models. To better examine the therapeutic potential of clemastine, we examined its effect on demyelinated white matter lesions in rabbits, which exhibit progenitor densities and limited remyelination more closely matching those found in tissues from patients with MS.</p><p><strong>Methods: </strong>We used lysolecithin to induce demyelination in white matter of New Zealand rabbits and then administered oral clemastine (10mg/kg/day) for various periods before assessing the OPC and oligodendrocyte (OL) populations in these lesions.</p><p><strong>Results: </strong>Daily administration of clemastine for the full study period (56 days) increased oligodendrogenesis in white matter lesions. However, shorter durations of treatment failed to increase overall OL density despite enhancing OPC-to-OL differentiation. This effect was due to exhaustion of the OPC pool, as the differentiating progenitors were not replaced because of reduced OPC proliferation. Notably, delayed administration of clemastine led to an accumulation of activated OPCs expressing markers of senescence.</p><p><strong>Interpretation: </strong>Although capable of driving OL differentiation, clemastine treatment in rabbits hampered progenitor pool replenishment, induced senescence, and promoted conversion of microglia/macrophages to a proinflammatory phenotype. Whether these effects would also occur in humans or with other prodifferentiative therapies should be studied further, but our data suggest the need to carefully consider progenitor dynamics in the treatment of MS. ANN NEUROL 2024.</p>","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pascal Benkert, Aleksandra Maleska Maceski, Sabine Schaedelin, Johanna Oechtering, Amar Zadic, Juan Francisco Vilchez Gomez, Lester Melie-Garcia, Alessandro Cagol, Riccardo Galbusera, Suvitha Subramaniam, Johannes Lorscheider, Edoardo Galli, Jannis Mueller, Bettina Fischer-Barnicol, Lutz Achtnichts, Oliver Findling, Patrice H Lalive, Claire Bridel, Marjolaine Uginet, Stefanie Müller, Caroline Pot, Amandine Mathias, Renaud Du Pasquier, Anke Salmen, Robert Hoepner, Andrew Chan, Giulio Disanto, Chiara Zecca, Marcus D'Souza, Lars G Hemkens, Özgür Yaldizli, Tobias Derfuss, Patrick Roth, Claudio Gobbi, David Brassat, Björn Tackenberg, Rosetta Pedotti, Catarina Raposo, Jorge Oksenberg, Heinz Wiendl, Klaus Berger, Marco Hermesdorf, Fredrik Piehl, David Conen, Andreas Buser, Ludwig Kappos, Michael Khalil, Cristina Granziera, Ahmed Abdelhak, David Leppert, Eline A J Willemse, Jens Kuhle
{"title":"Serum Glial Fibrillary Acidic Protein and Neurofilament Light Chain Levels Reflect Different Mechanisms of Disease Progression under B-Cell Depleting Treatment in Multiple Sclerosis.","authors":"Pascal Benkert, Aleksandra Maleska Maceski, Sabine Schaedelin, Johanna Oechtering, Amar Zadic, Juan Francisco Vilchez Gomez, Lester Melie-Garcia, Alessandro Cagol, Riccardo Galbusera, Suvitha Subramaniam, Johannes Lorscheider, Edoardo Galli, Jannis Mueller, Bettina Fischer-Barnicol, Lutz Achtnichts, Oliver Findling, Patrice H Lalive, Claire Bridel, Marjolaine Uginet, Stefanie Müller, Caroline Pot, Amandine Mathias, Renaud Du Pasquier, Anke Salmen, Robert Hoepner, Andrew Chan, Giulio Disanto, Chiara Zecca, Marcus D'Souza, Lars G Hemkens, Özgür Yaldizli, Tobias Derfuss, Patrick Roth, Claudio Gobbi, David Brassat, Björn Tackenberg, Rosetta Pedotti, Catarina Raposo, Jorge Oksenberg, Heinz Wiendl, Klaus Berger, Marco Hermesdorf, Fredrik Piehl, David Conen, Andreas Buser, Ludwig Kappos, Michael Khalil, Cristina Granziera, Ahmed Abdelhak, David Leppert, Eline A J Willemse, Jens Kuhle","doi":"10.1002/ana.27096","DOIUrl":"https://doi.org/10.1002/ana.27096","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the longitudinal dynamics of serum glial fibrillary acidic protein (sGFAP) and serum neurofilament light chain (sNfL) levels in people with multiple sclerosis (pwMS) under B-cell depleting therapy (BCDT) and their capacity to prognosticate future progression independent of relapse activity (PIRA) events.</p><p><strong>Methods: </strong>A total of 362 pwMS (1,480 samples) starting BCDT in the Swiss Multiple Sclerosis (MS) Cohort were included. sGFAP levels in 2,861 control persons (4,943 samples) provided normative data to calculate adjusted Z scores.</p><p><strong>Results: </strong>Elevated sGFAP levels (Z score >1) at 1 year were associated with a higher hazard for PIRA (hazard ratio [HR]: 1.80 [95% CI: 1.17-2.78]; p = 0.0079) than elevated sNfL levels (HR, 1.45 [0.95-2.24], p = 0.0886) in a combined model. Independent of PIRA events, sGFAP levels longitudinally increased by 0.49 Z score units per 10 years follow-up (estimate, 0.49 [0.29, 0.69], p < 0.0001). In patients experiencing PIRA, sGFAP Z scores were 0.52 Z score units higher versus stable patients (0.52 [0.22, 0.83], p = 0.0009). Different sNfL Z score trajectories were found in pwMS with versus without PIRA (interaction p = 0.0028), with an average decrease of 0.92 Z score units per 10 years observed without PIRA (-0.92 [-1.23, -0.60], p < 0.0001), whereas levels in patients with PIRA remained high.</p><p><strong>Interpretation: </strong>Elevated sGFAP and lack of drop in sNfL after BCDT start are associated with increased risk of future PIRA. These findings provide a rationale for combined monitoring of sNfL and sGFAP in pwMS starting BCDT to predict the risk of PIRA, and to use sGFAP as an outcome in clinical trials aiming to impact on MS progressive disease biology. ANN NEUROL 2024.</p>","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jing Yuan MD, MPH, Qiushan Tao MD, MS, Ting Fang Alvin Ang MD, MPH, Chunyu Liu PhD, Sherral Devine PhD, Sanford H. Auerbach MD, Jesse Mez MD, Lindsay A. Farrer PhD, Wei Qiao Qiu MD, PhD, Rhoda Au PhD
{"title":"The Relationship between Framingham Stroke Risk Profile on Incident Dementia and Alzheimer's Disease: A 40-Year Follow-Up Study Highlighting Female Vulnerability","authors":"Jing Yuan MD, MPH, Qiushan Tao MD, MS, Ting Fang Alvin Ang MD, MPH, Chunyu Liu PhD, Sherral Devine PhD, Sanford H. Auerbach MD, Jesse Mez MD, Lindsay A. Farrer PhD, Wei Qiao Qiu MD, PhD, Rhoda Au PhD","doi":"10.1002/ana.27108","DOIUrl":"10.1002/ana.27108","url":null,"abstract":"<div>\u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>Sex differences in the association between cardiovascular risk factors and the incident all-cause dementia and the subtype Alzheimer's disease (AD) risk are unclear.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Framingham Heart Study (FHS) participants (n = 4,171, 54% women, aged 55 to 69 years) were included at baseline and followed up to 40 years. The Framingham Stroke Risk Profile (FSRP) was dichotomized into 2 levels (cutoff: 75th percentile of the FSRP z-scores). Cause-specific hazard models, with death as a competing event, and restricted mean survival time (RMST) model were used to analyze the association between FSRP levels and incident all-cause dementia and AD. Interactions between FSRP and sex were estimated, followed by a sex-stratified analysis to examine the sex modification effect.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>High FSRP was significantly associated with all-cause dementia (hazard ratio [HR] = 1.25, robust 95% confidence interval [CI] = 1.21 to 1.29, <i>p <</i> 0.001) and AD (HR = 1.58, robust 95% CI = 1.57 to 1.59, <i>p <</i> 0.001) in cause-specific hazard models. High FSRP was significantly associated with incident dementia (HR = 2.81, robust 95% CI = 2.75 to 2.87, <i>p</i> < 0.001) and AD (HR = 2.96, robust 95% CI = 2.36 to 3.71, <i>p</i> < 0.001) in women, but not in men. Results were consistent in the RMST models. Current diabetes and high systolic blood pressure as FSRP components were significantly associated with dementia and AD in women but not in men.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Interpretation</h3>\u0000 \u0000 <p>High FSRP in mid- to early late life is a critical risk factor for all-cause dementia and AD, particularly in women. Sex-specific interventions and further research to elucidate underlying mechanisms are warranted. ANN NEUROL 2024;96:1124–1134</p>\u0000 </section>\u0000 </div>","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":"96 6","pages":"1124-1134"},"PeriodicalIF":8.1,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ana.27108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Subarachnoid Hemorrhage Following Ischemia Due to Dolichoectatic Aneurysm.","authors":"Daisuke Tahara, Kohei Asano, Keizo Yasui, Yasushi Iwasaki","doi":"10.1002/ana.27111","DOIUrl":"https://doi.org/10.1002/ana.27111","url":null,"abstract":"","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Julien Boucherit, Marios Psychogios, Manoëlle Kossorotoff, Jens Fiehler, Basile Kerleroux, André Kemmling, Olivier Naggara, Sarah Lee, Thi Dan Linh Nguyen-Kim, François Eugene, Moritz Wildgruber, Gregoire Boulouis, Peter B Sporns
{"title":"Mechanical Thrombectomy for Pediatric Stroke: Focal Cerebral Arteriopathy Versus Cardioembolic Etiologies-Pooled Analysis of the Save ChildS and KidClot Cohort.","authors":"Julien Boucherit, Marios Psychogios, Manoëlle Kossorotoff, Jens Fiehler, Basile Kerleroux, André Kemmling, Olivier Naggara, Sarah Lee, Thi Dan Linh Nguyen-Kim, François Eugene, Moritz Wildgruber, Gregoire Boulouis, Peter B Sporns","doi":"10.1002/ana.27088","DOIUrl":"https://doi.org/10.1002/ana.27088","url":null,"abstract":"<p><strong>Background: </strong>The study aimed to compare outcomes of mechanical thrombectomy (MT) in pediatric patients with acute ischemic stroke (AIS) caused by focal cerebral arteriopathy (FCA) versus cardioembolism (CE).</p><p><strong>Methods: </strong>Data from the Save ChildS and KidClot cohorts were merged. Children with AIS because of FCA or CE that underwent MT were included. The study used the Childhood Arterial Ischemic Stroke Standardized Classification and Diagnostic Evaluation (CASCADE) for stroke cause assessment. Descriptive statistics and multivariable regression models were used to analyze final modified thrombolysis in cerebral infarction (mTICI) scores, periprocedural complications, and functional outcomes assessed by the modified Rankin scale (mRS) at 6 to 12 months.</p><p><strong>Results: </strong>The analysis included 60 children with 14 FCA and 46 CE cases. CE etiology was associated with better revascularization (good to excellent thrombolysis in cerebral infarction scores) and shift toward better outcomes (common adjusted odds ratio of mRs for CE vs FCA: 0.27, 95% CI: [0.06-0.97], p = 0.039), with no difference in favorable outcome rates. FCA was associated with significantly lower rates of excellent revascularization (21% vs 65%, p < 0.001). No difference in complications' rates was observed between the groups (7.2% in FCA vs 5.5%, p = 0.69).</p><p><strong>Interpretation: </strong>We found that pediatric AIS because of CE etiology has more favorable procedural outcomes compared to FCA following MT. This translated to mixed functional outcomes that may be more favorable in the CE group. These findings highlight the need for further research to refine treatment protocols for pediatric stroke, particularly in understanding and managing FCA in children. ANN NEUROL 2024.</p>","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ileana M. Howard MD, Suma Babu MBBS, MPH, Chelsey Carter PhD, MPH, Stacey A. Sakowski PhD, Jerome E. Kurent MD, MS, MPH, Merit E. Cudkowicz MD, MSC, Eva L. Feldman MD, PhD
{"title":"Priorities and Recommendations to Make ALS a Livable Disease Emanating from the 2024 National Academies of Sciences, Engineering, and Medicine Report Living with ALS","authors":"Ileana M. Howard MD, Suma Babu MBBS, MPH, Chelsey Carter PhD, MPH, Stacey A. Sakowski PhD, Jerome E. Kurent MD, MS, MPH, Merit E. Cudkowicz MD, MSC, Eva L. Feldman MD, PhD","doi":"10.1002/ana.27097","DOIUrl":"10.1002/ana.27097","url":null,"abstract":"<p>Amyotrophic lateral sclerosis (ALS) is a relentless, fatal neurodegenerative disease. The progressive loss of voluntary muscle function, diagnostic delays, lack of effective treatments, and challenges accessing multidisciplinary care and resources have tremendous impact on quality of life. The congressionally directed ALS committee of the National Academies of Science, Engineering, and Medicine, in their 2024 report “Living with ALS,” recommends critical actions for specific United States stakeholders to make ALS a livable disease over the next decade. This review summarizes the context and recommendations of the report. Advocacy efforts are critical to make these recommendations a reality for the ALS community. ANN NEUROL 2024;96:1035–1039</p>","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":"96 6","pages":"1035-1039"},"PeriodicalIF":8.1,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11563851/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gretel Sanabria-Diaz, Alessandro Cagol, Po-Jui Lu, Muhamed Barakovic, Mario Ocampo-Pineda, Xinjie Chen, Matthias Weigel, Esther Ruberte, Nina de Oliveira S Siebenborn, Riccardo Galbusera, Sabine Schädelin, Pascal Benkert, Jens Kuhle, Ludwig Kappos, Lester Melie-Garcia, Cristina Granziera
{"title":"Advanced MRI Measures of Myelin and Axon Volume Identify Repair in Multiple Sclerosis.","authors":"Gretel Sanabria-Diaz, Alessandro Cagol, Po-Jui Lu, Muhamed Barakovic, Mario Ocampo-Pineda, Xinjie Chen, Matthias Weigel, Esther Ruberte, Nina de Oliveira S Siebenborn, Riccardo Galbusera, Sabine Schädelin, Pascal Benkert, Jens Kuhle, Ludwig Kappos, Lester Melie-Garcia, Cristina Granziera","doi":"10.1002/ana.27102","DOIUrl":"https://doi.org/10.1002/ana.27102","url":null,"abstract":"<p><strong>Objective: </strong>Pathological studies suggest that multiple sclerosis (MS) lesions endure multiple waves of damage and repair; however, the dynamics and characteristics of these processes are poorly understood in patients living with MS.</p><p><strong>Methods: </strong>We studied 128 MS patients (75 relapsing-remitting, 53 progressive) and 72 healthy controls who underwent advanced magnetic resonance imaging and clinical examination at baseline and 2 years later. Magnetization transfer saturation and multi-shell diffusion imaging were used to quantify longitudinal changes in myelin and axon volumes within MS lesions. Lesions were grouped into 4 classes (repair, damage, mixed repair damage, and stable). The frequency of each class was correlated to clinical measures, demographic characteristics, and levels of serum neurofilament light chain (sNfL).</p><p><strong>Results: </strong>Stable lesions were the most frequent (n = 2,276; 44%), followed by lesions with patterns of \"repair\" (n = 1,352; 26.2%) and damage (n = 1,214; 23.5%). The frequency of \"repair\" lesion was negatively associated with disability (β = -0.04; p < 0.001) and sNfL (β = -0.16; p < 0.001) at follow-up. The frequency of the \"damage\" class was higher in progressive than relapsing-remitting patients (p < 0.05) and was related to disability (baseline: β = -0.078; follow-up: β = -0.076; p < 0.001) and age (baseline: β = -0.078; p < 0.001). Stable lesions were more frequent in relapsing-remitting than in progressive patients (p < 0.05), and in younger patients versus older (β = -0.07; p < 0.001) at baseline. Further, \"mixed\" lesions were most frequent in older patients (β = 0.004; p < 0.001) at baseline.</p><p><strong>Interpretation: </strong>These findings show that repair and damage processes within MS lesions occur across the entire disease spectrum and that their frequency correlates with patients disability, age, disease duration, and extent of neuroaxonal damage. ANN NEUROL 2024.</p>","PeriodicalId":127,"journal":{"name":"Annals of Neurology","volume":" ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}