Presynaptic failure of neuromuscular transmission and synaptic remodeling in EA2.

Abstract:

OBJECTIVE:To further investigate the basis of abnormal neuromuscular transmission in two patients with congenital myasthenic syndrome associated with episodic ataxia type 2 (EA2) using stimulated single fiber EMG (SFEMG) and in vitro microelectrode studies. METHODS:Two patients with genetically characterized EA2 previously shown to have abnormal neuromuscular transmission by voluntary SFEMG were studied with stimulated SFEMG and anconeus muscle biopsy with microelectrode studies and electron microscopy of the neuromuscular junction. RESULTS:In vivo stimulated SFEMG showed signs of presynaptic failure, with jitter and blocking that improved with increased stimulation frequency. Additional evidence of presynaptic failure was provided by the in vitro microelectrode studies, which showed marked reduction of the end plate potential quantal content in both patients. Of note, the end plate potentials showed high sensitivity to N-type blockade with omega-conotoxin not seen in controls. The ultrastructural studies revealed some evidence of small nerve terminals apposed to normal or mildly overdeveloped postsynaptic membranes, suggesting an ongoing degenerative process. CONCLUSIONS:The authors demonstrated presynaptic failure of neurotransmission in patients with heterozygous nonsense mutations in CACNA1A. The contribution of non-P-type calcium channels to the process of neurotransmitter release in these patients likely represents a compensatory mechanism, which is insufficient to restore normal neuromuscular transmission.

journal_name

Neurology

journal_title

Neurology

authors

Maselli RA,Wan J,Dunne V,Graves M,Baloh RW,Wollmann RL,Jen J

doi

10.1212/01.wnl.0000099748.41130.9a

subject

Has Abstract

pub_date

2003-12-23 00:00:00

pages

1743-8

issue

12

eissn

0028-3878

issn

1526-632X

journal_volume

61

pub_type

杂志文章
  • Familial 'sleep apnea plus' syndrome: report of a family.

    abstract::We describe a familial disorder consisting of sleep apnea, anosmia, colorblindness, partial complex seizures, and cognitive dysfunction. The phenotypic expression of the syndrome suggests an autosomal dominant inheritance with incomplete penetrance. ...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.38.2.190

    authors: Manon-Espaillat R,Gothe B,Adams N,Newman C,Ruff R

    更新日期:1988-02-01 00:00:00

  • GFAP and S100B are biomarkers of traumatic brain injury: an observational cohort study.

    abstract:BACKGROUND:Biomarker levels in blood after traumatic brain injury (TBI) may offer diagnostic and prognostic tools in addition to clinical indices. This study aims to validate glial fibrillary acidic protein (GFAP) and S100B concentrations in blood as outcome predictors of TBI using cutoff levels of 1.5 μg/L for GFAP an...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/WNL.0b013e3181fd62d2

    authors: Vos PE,Jacobs B,Andriessen TM,Lamers KJ,Borm GF,Beems T,Edwards M,Rosmalen CF,Vissers JL

    更新日期:2010-11-16 00:00:00

  • Coccidioidal meningitis and brain abscesses: analysis of 71 cases at a referral center.

    abstract:OBJECTIVE:Coccidioides species are the most common etiologic agents of chronic meningitis in regions endemic for coccidioidomycosis. Occasionally, even short-term travel to endemic regions results in the acquisition of meningeal disease, so awareness of this complication of coccidioidomycosis is important even in nonen...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/WNL.0b013e3181c34b69

    authors: Drake KW,Adam RD

    更新日期:2009-11-24 00:00:00

  • Persistence of ictal activity after functional hemispherectomy in Rasmussen syndrome.

    abstract::A 15-year-old girl with a 3-year history of Rasmussen syndrome (RS) underwent left functional hemispherectomy by central disconnection. Clinical seizures then ceased. Five months postoperatively, ictal EEG discharges were associated with focal hyperperfusion on SPECT within the disconnected hypoperfused left hemispher...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.60.1.140

    authors: Thomas P,Zifkin B,Ghetâu G,Delalande O

    更新日期:2003-01-14 00:00:00

  • Effects of botulinum toxin on motor system excitability in patients with writer's cramp.

    abstract:OBJECTIVE:To investigate botulinum toxin (BTX) effects on central and peripheral motor excitability in writer's cramp. METHODS:Using transcranial magnetic stimulation over the motor cortex and brainstem and peripheral electrical stimulation, the authors investigated measures of motor cortical and peripheral motor exci...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/01.wnl.0000095965.36574.0f

    authors: Boroojerdi B,Cohen LG,Hallett M

    更新日期:2003-12-09 00:00:00

  • Human herpesvirus 8 DNA in CNS lymphomas from patients with and without AIDS.

    abstract:BACKGROUND AND OBJECTIVE:Human herpesvirus 8 (HHV-8) has been found in association with Kaposi's sarcomas in human immunodeficiency virus (HIV)-positive and -negative patients, primary effusion lymphomas (PELs), multicentric Castleman's disease, and multiple myeloma. The PELs share several features with acquired immuno...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.50.2.335

    authors: Corboy JR,Garl PJ,Kleinschmidt-DeMasters BK

    更新日期:1998-02-01 00:00:00

  • Rostral lateral pontine infarction: neurological/topographical correlations.

    abstract::The authors correlated neurologic features of rostral lateral pontine infarct (rLPI) with lesion location on MRI. rLPI is a motor-sensory stroke presenting as crural monoparesis or crural dominant hemiparesis and segmental superficial or deep sensory disturbances. The dorsolateral pontine base causes crural paresis wi...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/01.wnl.0000072323.19180.b7

    authors: Kataoka S,Miaki M,Saiki M,Saiki S,Yamaya Y,Hori A,Hirose G

    更新日期:2003-07-08 00:00:00

  • Internuclear ophthalmoplegia as an isolated or predominant symptom of brainstem infarction.

    abstract:OBJECTIVE:To describe the clinical features, MRI findings, and pathogenesis of strokes producing internuclear ophthalmoplegia (INO) as an isolated or predominant clinical manifestation. METHODS:Thirty patients presenting with INO without (n = 12) or with (n = 18) minimal other neurologic signs were studied. MRI and an...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/01.wnl.0000123093.37069.6d

    authors: Kim JS

    更新日期:2004-05-11 00:00:00

  • Why do frontal lobe symptoms predominate in vascular dementia with lacunes?

    abstract::We studied 30 necropsy cases of vascular dementia with a lacunar state. Manifestations included dementia, lack of volition, emotional lability, small-stepped gait, dysarthria, urinary incontinence, grasp reflex, pyramidal signs, paraplegia in flexion, and akinetic mutism. Pathologically, there was diffuse incomplete s...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.36.3.340

    authors: Ishii N,Nishihara Y,Imamura T

    更新日期:1986-03-01 00:00:00

  • Frontal lobe neglect in monkeys.

    abstract::Using a crossed-response task, monkeys with neglect induced by frontal lesions appear to have motor rather than sensory neglect. However, the crossed-response task may not reveal sensory neglect (inattention) if no perceptual discrimination is required. We therefore trained two monkeys in a perceptually complex crosse...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.45.6.1205

    authors: Heilman KM,Valenstein E,Day A,Watson R

    更新日期:1995-06-01 00:00:00

  • Brain white matter volume abnormalities in Lesch-Nyhan disease and its variants.

    abstract:OBJECTIVE:We sought to examine brain white matter abnormalities based on MRI in adults with Lesch-Nyhan disease (LND) or an attenuated variant (LNV) of this rare, X-linked neurodevelopmental disorder of purine metabolism. METHODS:In this observational study, we compared 21 adults with LND, 17 with LNV, and 33 age-, se...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/WNL.0000000000001128

    authors: Schretlen DJ,Varvaris M,Vannorsdall TD,Gordon B,Harris JC,Jinnah HA

    更新日期:2015-01-13 00:00:00

  • Neurocognition, sleep, and PET findings in type 2 vs type 1 narcolepsy.

    abstract:OBJECTIVE:To analyze differences in functional brain images collected in patients with type 2 and type 1 narcolepsy compared to normal controls and the relationship among brain images, objective neuropsychologic tests, and sleep findings. METHODS:Data collection included comprehensive clinical investigation, study of ...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/WNL.0000000000005346

    authors: Huang YS,Hsiao IT,Liu FY,Hwang FM,Lin KL,Huang WC,Guilleminault C

    更新日期:2018-04-24 00:00:00

  • Pharmacologic management of seizures in organ transplant.

    abstract::Seizures in a transplant candidate or recipient raise complicated management issues, but there are no results from controlled drug trials to guide their pharmacologic treatment. Most seizures in the transplant population are isolated events that do not require long-term antiseizure therapy. Short-term therapy, however...

    journal_title:Neurology

    pub_type: 杂志文章,评审

    doi:10.1212/wnl.67.12_suppl_4.s34

    authors: Chabolla DR,Wszolek ZK

    更新日期:2006-12-26 00:00:00

  • Timing of milestone competency acquisition in neurology residency: What by when?

    abstract:OBJECTIVE:To determine the stage of training at which neurology residents should achieve individual elements of the Accreditation Council for Graduate Medical Education neurology Milestones and to examine the relationship between perceived importance of Milestones and the stage by which they should be achieved. METHOD...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/WNL.0000000000006361

    authors: Jones LK Jr,Eggers SDZ,Capobianco DJ,Boes CJ

    更新日期:2018-10-16 00:00:00

  • Restless legs syndrome and PD: a review of the evidence for a possible association.

    abstract::Restless legs syndrome (RLS) is a common neurologic disorder whose prevalence has been estimated at 4 to 10% of the general population. Although its pathophysiology remains unknown, dopaminergic mechanisms are believed to play a central role. Furthermore, dopaminergic drugs have shown therapeutic efficacy in various l...

    journal_title:Neurology

    pub_type: 杂志文章,评审

    doi:10.1212/wnl.61.6_suppl_3.s49

    authors: Garcia-Borreguero D,Odin P,Serrano C

    更新日期:2003-09-23 00:00:00

  • Discrepancy between stimulus response and tolerance of pain in Alzheimer disease.

    abstract:BACKGROUND:Affective-motivational and sensory-discriminative aspects of pain were investigated in patients with mild to moderate Alzheimer disease (AD) and healthy elderly controls using the cold pressor test tolerance and repetitive stimuli of warmth and heat stimuli, evaluating the stimulus-response function. METHOD...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/WNL.0000000000001465

    authors: Jensen-Dahm C,Werner MU,Jensen TS,Ballegaard M,Andersen BB,Høgh P,Waldemar G

    更新日期:2015-04-14 00:00:00

  • Spinal cord infarction: etiology and outcome.

    abstract::We reviewed 44 cases of ischemia and infarction of the spinal cord at two university hospitals. Three patients experienced transient ischemic attacks. Etiologies of completed strokes were diverse and included rupture and surgical repair of aortic aneurysms, aortic dissection, aortic rupture and thrombosis, global isch...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.47.2.321

    authors: Cheshire WP,Santos CC,Massey EW,Howard JF Jr

    更新日期:1996-08-01 00:00:00

  • Cyproheptadine reduces or prevents ischemic central nervous system damage.

    abstract::Several drugs that inhibit the effects of serotonin may reduce or prevent experimental CNS ischemic damage, but these drugs are not approved for human use in the United States. Administration of cyproheptadine (which is available for clinical use) 15 minutes before or 5 minutes after the onset increased the duration o...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.35.4.584

    authors: Zivin JA

    更新日期:1985-04-01 00:00:00

  • Efficacy and tolerability of the new antiepileptic drugs II: treatment of refractory epilepsy: report of the Therapeutics and Technology Assessment Subcommittee and Quality Standards Subcommittee of the American Academy of Neurology and the American Epile

    abstract:OBJECTIVE:To assess the evidence demonstrating efficacy, tolerability, and safety of seven new antiepileptic drugs (AEDs) (gabapentin, lamotrigine, topiramate, tiagabine, oxcarbazepine, levetiracetam, and zonisamide) in the treatment of children and adults with refractory partial and generalized epilepsies. METHODS:A ...

    journal_title:Neurology

    pub_type: 指南,杂志文章,实务指引,评审

    doi:10.1212/01.wnl.0000123695.22623.32

    authors: French JA,Kanner AM,Bautista J,Abou-Khalil B,Browne T,Harden CL,Theodore WH,Bazil C,Stern J,Schachter SC,Bergen D,Hirtz D,Montouris GD,Nespeca M,Gidal B,Marks WJ Jr,Turk WR,Fischer JH,Bourgeois B,Wilner A,Faught R

    更新日期:2004-04-27 00:00:00

  • Vitamin D, cognition, and dementia: a systematic review and meta-analysis.

    abstract:OBJECTIVE:To examine the association between cognitive function and dementia with vitamin D concentration in adults. METHODS:Five databases were searched for English-language studies up to August 2010, and included all study designs with a comparative group. Cognitive function or impairment was defined by tests of glo...

    journal_title:Neurology

    pub_type: 杂志文章,meta分析,评审

    doi:10.1212/WNL.0b013e31826c197f

    authors: Balion C,Griffith LE,Strifler L,Henderson M,Patterson C,Heckman G,Llewellyn DJ,Raina P

    更新日期:2012-09-25 00:00:00

  • Peripheral neuropathy in vanishing white matter disease with a novel EIF2B5 mutation.

    abstract::The authors describe an infant with vanishing white matter disease with demyelinating peripheral neuropathy. Sequence analysis of EIF2B5 gene showed that the patient was a double heterozygote, with novel missense mutation CGA-->CAA in codon 269 of exon 6, resulting in the replacement of an arginine residue with glutam...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/01.wnl.0000225077.40532.a5

    authors: Federico A,Scali O,Stromillo ML,Di Perri C,Bianchi S,Sicurelli F,De Stefano N,Malandrini A,Dotti MT

    更新日期:2006-07-25 00:00:00

  • Correlation between NF1 genotype and imaging phenotype on whole-body MRI: NF1 radiogenomics.

    abstract:OBJECTIVE:To investigate the genotype-phenotype correlation between neurofibromatosis 1 (NF1) germline mutations and imaging features of neurofibromas on whole-body MRI (WBMRI) by using radiomics image analysis techniques. MATERIALS AND METHODS:Twenty-nine patients with NF1 who had known germline mutations determined ...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/WNL.0000000000009490

    authors: Liu Y,Jordan JT,Bredella MA,Erdin S,Walker JA,Vangel M,Harris GJ,Plotkin SR,Cai W

    更新日期:2020-06-16 00:00:00

  • Avoidance of dyskinesia: preclinical evidence for continuous dopaminergic stimulation.

    abstract::Current concepts suggest that avoidance of pulsatile stimulation of dopamine receptors in Parkinson's disease (PD) can prevent the onset of dyskinesia. In MPTP-treated primates, repeated administration of levodopa or other short-acting dopamine agonist drugs leads to the onset of marked involuntary movements. In contr...

    journal_title:Neurology

    pub_type: 杂志文章,评审

    doi:10.1212/wnl.62.1_suppl_1.s47

    authors: Jenner P

    更新日期:2004-01-13 00:00:00

  • Infarcts with a cardiac source of embolism in the NINCDS Stroke Data Bank: historical features.

    abstract::To gain insight into the historical features relevant to the diagnosis of cardiac embolic strokes, we studied the 1,290 patients with cerebral infarcts in the NINCDS Stroke Data Bank. Based solely on the presence of cardiac sources of embolism, we divided the patients into groups of high (n = 250), medium (n = 166), a...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.40.2.281

    authors: Kittner SJ,Sharkness CM,Price TR,Plotnick GD,Dambrosia JM,Wolf PA,Mohr JP,Hier DB,Kase CS,Tuhrim S

    更新日期:1990-02-01 00:00:00

  • Dementia in Down's syndrome: cerebral glucose utilization, neuropsychological assessment, and neuropathology.

    abstract::We measured the cerebral metabolic rate for glucose (CMRglc) with positron emission tomography and [18F]2-fluoro-2-deoxy-D-glucose in a 47-year-old man with trisomy 21 Down's syndrome (DS) and autopsy-confirmed Alzheimer's disease. Dementia was evident from a confirmed history of cognitive decline, memory loss, and pe...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.38.6.938

    authors: Schapiro MB,Ball MJ,Grady CL,Haxby JV,Kaye JA,Rapoport SI

    更新日期:1988-06-01 00:00:00

  • Paraneoplastic opsoclonus-myoclonus associated with anti-Hu antibody.

    abstract::We report a 74-year-old woman with opsoclonus, myoclonus, ataxia, and encephalopathy who had small-cell lung cancer and high titers of anti-Hu antibody in her serum. At autopsy, there were perivascular inflammatory infiltrates in the brainstem, putamen, and meninges overlying the orbital frontal cortex. Immunohistoche...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/wnl.44.9.1754

    authors: Hersh B,Dalmau J,Dangond F,Gultekin S,Geller E,Wen PY

    更新日期:1994-09-01 00:00:00

  • Insulin resistance and risk for stroke.

    abstract:BACKGROUND AND PURPOSE:Resistance to insulin-mediated glucose uptake by peripheral tissues is a cardinal defect in type 2 diabetes mellitus. Insulin resistance is also common among nondiabetic individuals, and may be an important risk factor for stroke in both populations. The authors review the definition, epidemiolog...

    journal_title:Neurology

    pub_type: 杂志文章,评审

    doi:10.1212/wnl.59.6.809

    authors: Kernan WN,Inzucchi SE,Viscoli CM,Brass LM,Bravata DM,Horwitz RI

    更新日期:2002-09-24 00:00:00

  • Gustatory agnosia.

    abstract:OBJECTIVE:To report the assessment of a patient exhibiting gustatory agnosia. METHODS:Preoperative and postoperative neuropsychological, neuroimaging, and chemosensory evaluations were performed in a 39-year-old woman undergoing surgical treatment for intractable epilepsy. RESULTS:Preoperative MRIs showed bilateral (...

    journal_title:Neurology

    pub_type: 杂志文章

    doi:10.1212/01.WNL.0000149515.77718.35

    authors: Small DM,Bernasconi N,Bernasconi A,Sziklas V,Jones-Gotman M

    更新日期:2005-01-25 00:00:00

  • Congenital muscular dystrophies with defective glycosylation of dystroglycan: a population study.

    abstract:BACKGROUND:Congenital muscular dystrophies (CMD) with reduced glycosylation of alpha-dystroglycan (alpha-DG) are a heterogeneous group of conditions associated with mutations in six genes encoding proven or putative glycosyltransferases. OBJECTIVES:The aim of the study was to establish the prevalence of mutations in t...

    journal_title:Neurology

    pub_type: 杂志文章,多中心研究

    doi:10.1212/01.wnl.0000346518.68110.60

    authors: Mercuri E,Messina S,Bruno C,Mora M,Pegoraro E,Comi GP,D'Amico A,Aiello C,Biancheri R,Berardinelli A,Boffi P,Cassandrini D,Laverda A,Moggio M,Morandi L,Moroni I,Pane M,Pezzani R,Pichiecchio A,Pini A,Minetti C,Mon

    更新日期:2009-05-26 00:00:00

  • Controlled study of the antiparkinsonian activity and tolerability of cabergoline.

    abstract::Cabergoline, a new ergoline derivative, is a D2-specific dopaminergic agonist that is more potent and longer-acting than other agonist agents. We conducted a randomized, double-blind study of increasing doses of cabergoline taken once a day. Twenty-five patients with Parkinson's disease taking stable doses of levodopa...

    journal_title:Neurology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1212/wnl.43.3_part_1.613

    authors: Hutton JT,Morris JL,Brewer MA

    更新日期:1993-03-01 00:00:00