Abstract:
OBJECTIVE:Mitochondrial dysfunction plays a key role in the pathophysiology of neurodegenerative disorders such as ataxia and Parkinson's disease. We describe an extended Belgian pedigree where seven individuals presented with adult-onset cerebellar ataxia, axonal peripheral ataxic neuropathy, and tremor, in variable combination with parkinsonism, seizures, cognitive decline, and ophthalmoplegia. We sought to identify the underlying molecular etiology and characterize the mitochondrial pathophysiology of this neurological syndrome. METHODS:Clinical, neurophysiological, and neuroradiological evaluations were conducted. Patient muscle and cultured fibroblasts underwent extensive analyses to assess mitochondrial function. Genetic studies including genome-wide sequencing were conducted. RESULTS:Hallmarks of mitochondrial dysfunction were present in patients' tissues including ultrastructural anomalies of mitochondria, mosaic cytochrome c oxidase deficiency, and multiple mtDNA deletions. We identified a splice acceptor variant in POLG2, c.970-1G>C, segregating with disease in this family and associated with a concomitant decrease in levels of POLG2 protein in patient cells. INTERPRETATION:This work extends the clinical spectrum of POLG2 deficiency to include an overwhelming, adult-onset neurological syndrome that includes cerebellar syndrome, peripheral neuropathy, tremor, and parkinsonism. We therefore suggest to include POLG2 sequencing in the evaluation of ataxia and sensory neuropathy in adults, especially when it is accompanied by tremor or parkinsonism with white matter disease. The demonstration that deletions of mtDNA resulting from autosomal-dominant POLG2 variant lead to a monogenic neurodegenerative multicomponent syndrome provides further evidence for a major role of mitochondrial dysfunction in the pathomechanism of nonsyndromic forms of the component neurodegenerative disorders.
journal_name
Ann Clin Transl Neuroljournal_title
Annals of clinical and translational neurologyauthors
Van Maldergem L,Besse A,De Paepe B,Blakely EL,Appadurai V,Humble MM,Piard J,Craig K,He L,Hella P,Debray FG,Martin JJ,Gaussen M,Laloux P,Stevanin G,Van Coster R,Taylor RW,Copeland WC,Mormont E,Bonnen PEdoi
10.1002/acn3.361subject
Has Abstractpub_date
2016-11-16 00:00:00pages
4-14issue
1issn
2328-9503pii
ACN3361journal_volume
4pub_type
杂志文章abstract::The precise genetic cause remains elusive in nearly 50% of patients with presumed neurogenetic disease, representing a significant barrier for clinical care. This is despite significant advances in clinical genetic diagnostics, including the application of whole-exome sequencing and next-generation sequencing-based ge...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.267
更新日期:2015-12-08 00:00:00
abstract:INTRODUCTION:Multiple sclerosis (MS) is an enigmatic autoimmune-driven inflammatory/demyelinating disease of the human central nervous system (CNS), affecting brain, spinal cord, and optic nerves. The cause of the disease is not known and the number of effective treatments is limited. Despite some clear successes, tran...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章,评审
doi:10.1002/acn3.194
更新日期:2015-05-01 00:00:00
abstract:OBJECTIVE:To compare the values of arterial spin-labeled (ASL) MRI and fluorodeoxyglucose (FDG) PET in the diagnosis of behavioral variant of frontotemporal dementia (bvFTD) and Alzheimer's disease (AD). METHODS:Partial least squares logistic regression was used to identify voxels with diagnostic value in cerebral blo...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.330
更新日期:2016-08-30 00:00:00
abstract:Objectives:The aim of this study was to investigate whether short-term inverse occlusion, combined with moderate physical exercise, could promote the recovery of visual acuity and stereopsis in a group of adult anisometropic amblyopes. Methods:Ten adult anisometropic patients underwent six brief (2 h) training session...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.698
更新日期:2018-12-28 00:00:00
abstract:Objective:Limited attention has been given to ocular injuries associated with traumatic brain injury (TBI). The retina is an extension of the central nervous system and evaluation of ocular damage may offer a less-invasive approach to gauge TBI severity and response to treatment. We aim to characterize acute changes in...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.523
更新日期:2018-02-26 00:00:00
abstract::Rho-associated kinase (ROCK) is an emerging target in acute ischemic stroke. Early pre-hospital treatment with ROCK inhibitors may improve their efficacy, but their antithrombotic effects raise safety concerns in hemorrhagic stroke, precluding use prior to neuroimaging. Therefore, we tested whether ROCK inhibition aff...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.569
更新日期:2018-05-01 00:00:00
abstract:OBJECTIVE:Analysis of the T-cell receptor (TCR) repertoire in the cerebrospinal fluid (CSF) of patients with multiple sclerosis (MS) can reveal antigen-specific immune responses potentially implicated in the disease process. We applied a new unbiased deep-sequencing method for TCR repertoire analysis to accurately meas...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.310
更新日期:2016-04-20 00:00:00
abstract:OBJECT:Ischemic brain injury is the leading cause for death and long-term disability in patients who suffer cardiac arrest and embolic stroke. Excitotoxicity and subsequent Ca(2+)-overload lead to ischemic neuron death. We explore a novel mechanism concerning the role of the excitatory extracellular calcium-sensing rec...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.118
更新日期:2014-11-01 00:00:00
abstract:OBJECTIVE:Multiple sclerosis (MS) is an autoimmune demyelinating disorder, which is characterized by relapses and remissions. Serum neurofilament light chain (sNfL) is an emerging biomarker of disease activity but its clinical use is still limited. In this study, we aim to characterize the temporal association between ...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.51060
更新日期:2020-06-01 00:00:00
abstract::Refractory epilepsy and encephalopathy are frequently encountered in patients with inborn errors of metabolism. We report a case of an 8-year-old girl with history of developmental delay, autism and intractable epilepsy that was found to have a pathogenic variant in CAD. We briefly review the biochemical pathway of CA...
journal_title:Annals of clinical and translational neurology
pub_type:
doi:10.1002/acn3.51257
更新日期:2021-01-01 00:00:00
abstract:OBJECTIVE:To determine the frequency of distinctive EGFr cysteine altering NOTCH3 mutations in the 60,706 exomes of the exome aggregation consortium (ExAC) database. METHODS:ExAC was queried for mutations distinctive for cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASI...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.344
更新日期:2016-09-28 00:00:00
abstract:OBJECTIVE:Brain connectivity at rest is altered in temporal lobe epilepsy (TLE), particularly in "hub" areas such as the posterior default mode network (DMN). Although both functional and anatomical connectivity are disturbed in TLE, the relationships between measures as well as to seizure frequency remain unclear. We ...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.173
更新日期:2015-04-01 00:00:00
abstract::We demonstrate the first use of Optically Pumped Magnetoencephalography (OP-MEG) in an epilepsy patient with unrestricted head movement. Current clinical MEG uses a traditional SQUID system, where sensors are cryogenically cooled and housed in a helmet in which the patient's head is fixed. Here, we use a different typ...
journal_title:Annals of clinical and translational neurology
pub_type:
doi:10.1002/acn3.50995
更新日期:2020-03-01 00:00:00
abstract::Charcot-Marie-Tooth disease type-1A (CMT1A) is one of the most common types of inherited peripheral nerve diseases. It is caused by the trisomy of chromosome 17p12 (c17p12), a large DNA segment of 1.4 Mb containing PMP22 plus eight other genes. The size of c17p12 is formidable for any cloning technique to manipulate, ...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.432
更新日期:2017-06-15 00:00:00
abstract:BACKGROUND:Distal motor neuropathies with a genetic origin have a heterogeneous clinical presentation with overlapping features affecting distal nerves and including spinal muscular atrophies and amyotrophic lateral sclerosis. This indicates that their genetic background is heterogeneous. PATIENT AND METHODS:In this w...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.51050
更新日期:2020-05-01 00:00:00
abstract:Objective:Area postrema (AP) syndrome (defined as: nausea and/or emesis and/or singultus at onset of brainstem dysfunction) comprises complex pathophysiologic mechanisms triggered by different entities. The first objective was to assess the frequency of AP syndrome as a clinical feature in brainstem encephalitis (BE). ...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.666
更新日期:2018-10-31 00:00:00
abstract:OBJECTIVE:We aimed to investigate the association of the serum urate level with cortical thickness and white matter integrity in multiple system atrophy (MSA). METHODS:We recruited 75 MSA patients and 42 controls who underwent brain MRI and measured serum urate level at baseline. Using cortical thickness and tract-bas...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.51073
更新日期:2020-06-01 00:00:00
abstract:Background and Objective:Hispanics with multiple sclerosis (MS) present younger and more often with optic neuritis (ON) as compared to Whites in the western United States. Regional differences related to Hispanic genetic admixture could be responsible. We investigated the association between global genetic ancestry and...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.646
更新日期:2018-09-23 00:00:00
abstract:OBJECTIVE:Multiple sclerosis (MS) is a disease of the central nervous system with marked heterogeneity in several aspects including pathological processes. Based on infiltrating immune cells, deposition of humoral factors and loss of oligodendrocytes and/or myelin proteins, four lesion patterns have been described. Pat...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.218
更新日期:2015-09-01 00:00:00
abstract:OBJECTIVE:Trinucleotide GGC repeat expansion in the 5'UTR of the NOTCH2NLC gene has been recognized as the pathogenesis of neuronal intranuclear inclusion disease (NIID). Previous studies have described that some NIID patients showed clinical and pathological similarities with multiple system atrophy (MSA). This study ...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.51021
更新日期:2020-04-01 00:00:00
abstract:Objective:Determining the sequence in which Huntington's disease biomarkers become abnormal can provide important insights into the disease progression and a quantitative tool for patient stratification. Here, we construct and present a uniquely fine-grained model of temporal progression of Huntington's disease from pr...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.558
更新日期:2018-04-02 00:00:00
abstract:Objective:GDP-mannose pyrophosphorylase B (GMPPB) related phenotype spectrum ranges widely from congenital myasthenic syndrome (CMS), limb-girdle muscular dystrophy type 2T (LGMD 2T) to severe congenital muscle-eye-brain syndrome. Our study investigates the clinicopathologic features of a patient with novel GMPPB mutat...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.787
更新日期:2019-05-08 00:00:00
abstract:OBJECTIVE:The aim of this study was to evaluate if urinary sediment cells offered a robust alternative to muscle biopsy for the diagnosis of single mtDNA deletions. METHODS:Eleven adult patients with progressive external ophthalmoplegia and a known single mtDNA deletion were investigated. Urinary sediment cells were u...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.51119
更新日期:2020-08-01 00:00:00
abstract::We report six adult patients with Tyrosinaemia type 1 (HT-1) who presented with recurrent porphyria-like neurological crises after discontinuation/interruption of 2-(2-nitro-4-trifluoro-methylbenzyol)-1,3 cyclohexanedione (NTBC) treatment. The crises were life-threatening for some of the patients, with respiratory mus...
journal_title:Annals of clinical and translational neurology
pub_type:
doi:10.1002/acn3.51160
更新日期:2020-09-01 00:00:00
abstract:Objective:Previous studies have demonstrated that suppression of Nrf2 in Friedreich ataxia tissues contributes to excess oxidative stress, mitochondrial dysfunction, and reduced ATP production. Omaveloxolone, an Nrf2 activator and NF-kB suppressor, targets dysfunctional inflammatory, metabolic, and bioenergetic pathway...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章,随机对照试验
doi:10.1002/acn3.660
更新日期:2018-11-10 00:00:00
abstract:Objective:The prognostic value of cerebrospinal fluid neurofilament light chain, total tau, phosphorylated tau181, and amyloid beta1-42 was examined in frontotemporal dementia subtypes. Methods:We compared baseline biomarkers between 49 controls, 40 patients with behavioral variant frontotemporal dementia, 24 with sem...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.643
更新日期:2018-09-20 00:00:00
abstract:OBJECTIVE:Examine whether cognitive reserve moderates the association of 1) vascular risk factors and 2) white matter hyperintensity burden with risk of clinical progression and longitudinal cognitive decline. METHODS:BIOCARD Study participants were cognitively normal and primarily middle-aged (M = 57 years) at baseli...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.51120
更新日期:2020-08-01 00:00:00
abstract:Objective:To determine the cognitive profile of adult patients with mitochondrial disease, and the effect of disease severity on cognition. Methods:Using a prospective case-control design, we compared cognition of patients to normative data and to matched controls, assessed three times over 18 months. Forty-nine patie...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.736
更新日期:2019-03-27 00:00:00
abstract::The increasing number of potent treatments for multiple sclerosis warrants screening for infections. To investigate the prevalence of infections in two independent German patient cohorts with multiple sclerosis/neuromyelitis optica spectrum disorders (NMOSD), we performed a retrospective chart review study of multiple...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章
doi:10.1002/acn3.491
更新日期:2017-11-24 00:00:00
abstract::Spinocerebellar ataxia type 2 (SCA2) is among the most common forms of autosomal dominant ataxias, accounting for 15% of the total families. Occurrence is higher in specific populations such as the Cuban and Southern Italian. The disease is caused by a CAG expansion in ATXN2 gene, leading to abnormal accumulation of t...
journal_title:Annals of clinical and translational neurology
pub_type: 杂志文章,评审
doi:10.1002/acn3.437
更新日期:2017-08-10 00:00:00