Abstract：
:Myelinated axons efficiently transmit information over long distances. The apposed myelin sheath confers favorable electrical properties, but restricts access of the axon to its extracellular milieu. Therefore, axonal metabolic support may require specific axo-myelinic communication. Here we explored activity-dependent glutamate-mediated signaling from axon to myelin. 2-Photon microscopy was used to image Ca(2+) changes in myelin in response to electrical stimulation of optic nerve axons ex vivo. We show that optic nerve myelin responds to axonal action potentials by a rise in Ca(2+) levels mediated by GluN2D and GluN3A-containing NMDA receptors. Glutamate is released from axons in a vesicular manner that is tetanus toxin-sensitive. The Ca(2+) source for vesicular fusion is provided by ryanodine receptors on axonal Ca(2+) stores, controlled by L-type Ca(2+) channels that sense depolarization of the internodal axolemma. Genetic ablation of GluN2D and GluN3A subunits results in greater lability of the compact myelin. Our results support the existence of a novel synapse between the axon and its myelin, suggesting a means by which traversing action potentials can signal the overlying myelin sheath. This may be an important physiological mechanism by which an axon can signal companion glia for metabolic support or adjust properties of its myelin in a dynamic manner. The axo-myelinic synapse may contribute to learning, while its disturbances may play a role in the pathophysiology of central nervous system disorders such as schizophrenia, where subtle abnormalities of myelinated white matter tracts have been shown in the human, or to frank demyelinating disorders such as multiple sclerosis.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Micu I,Plemel JR,Lachance C,Proft J,Jansen AJ,Cummins K,van Minnen J,Stys PKdoi
10.1016/j.expneurol.2015.10.006subject
Has Abstractpub_date
2016-02-01 00:00:00pages
41-50eissn
0014-4886issn
1090-2430pii
S0014-4886(15)30107-2journal_volume
276pub_type
杂志文章abstract：:Effects of accumulation of phosphocreatine (P-creatine) on utilization and restoration of high-energy phosphates during anoxia and recovery were studied using thin hippocampal slices from the guinea pig. Incubation of slices with creatine (5 to 30 mM) increased the content of tissue P-creatine, in a linear fashion, an...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(83)90256-x
更新日期：1983-10-01 00:00:00
abstract：:Cannabis abuse may precipitate the onset of schizophrenia and a dysfunction of the endocannabinoid system may be involved in the pathology of schizophrenia. Nevertheless, only few studies have addressed the neurobiological consequences of cannabis abuse for the development and course of schizophrenia. We measured the ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2007.02.004
更新日期：2007-05-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(85)90027-5
更新日期：1985-11-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2013.11.005
更新日期：2014-01-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2008.03.022
更新日期：2008-07-01 00:00:00
abstract：:Activity-dependent alteration in synaptic efficacy is referred to as synaptic plasticity and is the believed hallmark of any learning process. Here we employed a recently validated complex maze for spatial training and investigated the impact of repeated and extensive training on basal synaptic transmission of the hip...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2006.08.025
更新日期：2007-02-01 00:00:00
abstract：:The tendency of a rat to approach the wall of an open-field and to travel along the perimeter of the field (termed as "peritaxis" or "wall-facing") is affected by unilateral removal of the vibrissae. Peritaxis is lateralized by hemivibrissotomy. The finding that the dopamine agonist apomorphine reversed the direction ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(88)90172-0
更新日期：1988-03-01 00:00:00
abstract：:Propentofylline is a xanthine derivative that has been known to protec t neurons against ischemia-induced damage. To assess its neuroprotective mechanisms, we examined the effect of propentofylline on microglial proliferation that is thought to play an important role in neuronal damage. We determined the proliferation...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1996.0035
更新日期：1996-02-01 00:00:00
abstract：:Neuronal migration was investigated in rodent cerebellum in vitro and in vivo. Time-lapse video recording showed that cultured neurons migrated on laminin by first extending neurites that formed contacts with other neurons. This was followed by movement of the cell nucleus inside the preformed process. No guidance cue...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(92)90119-b
更新日期：1992-08-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1994.1058
更新日期：1994-04-01 00:00:00
abstract：:Given the profound negative public health effects of major depressive disorder (MDD), and data suggesting only modest effectiveness of existing psychological and pharmacological treatments for this condition, there has been increasing interest in exploring the antidepressant potential of non-pharmacological, brain-bas...
journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1016/j.expneurol.2009.04.028
更新日期：2009-09-01 00:00:00
abstract：:It is clear that there are events which occur in response to neuromuscular activity that are essential to maintain normal muscle properties. Two factors though to influence muscle contractile properties are tension and electrical activity. To study these variables the hind limbs of 10 postpubertal female Sprague-Dawle...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(87)90226-3
更新日期：1987-06-01 00:00:00
abstract：:An increasing body of research suggests that a number of immune mechanisms play a role in degenerative pathways in Parkinson's disease (PD). In the current work we investigated a posited humoral immune response in this disorder. Sera from PD patients exhibited a significantly enhanced absorbance response on a novel EL...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2009.03.002
更新日期：2009-06-01 00:00:00
abstract：:Hyperbaric oxygenation is known to affect energy metabolism and endothelial cell structure and function, but its effects on peripheral nerve have not been reported. We investigated whether it would (i) reverse established streptozotocin-induced diabetic neuropathy, a condition in which endoneurial hypoxia exists; (ii)...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(88)90139-2
更新日期：1988-01-01 00:00:00
abstract：:Amyotrophic lateral sclerosis (ALS) is an adult-onset, fatal neurodegenerative syndrome characterized by the systemic loss of motor neurons with prominent astrocytosis and microgliosis in the spinal cord and brain. Astrocytes play an essential role in maintaining extracellular microenvironments that surround motor neu...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2018.06.009
更新日期：2018-09-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(89)90091-5
更新日期：1989-11-01 00:00:00
abstract：:In the present study, we investigated whether cultured astrocytes derived from adult neural precursor cells (NPCs) obtained from the subventricular zone (SVZ) of wobbler mice display metabolic traits of the wobbler astrocytes in situ and in primary culture. We also utilized NPC-derived astrocytes as a tool to investig...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2010.06.008
更新日期：2010-09-01 00:00:00
abstract：:The review outlines data consistent with the hypothesis that inspiratory drive transmission that generates fetal breathing movements (FBMs) is essential for the developmental plasticity of phrenic motoneurons (PMNs) and diaphragm musculature prior to birth. A systematic examination during the perinatal period demonstr...
journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1016/j.expneurol.2016.05.017
更新日期：2017-01-01 00:00:00
abstract：:The extent and kinetic profiles of lipid peroxidation induced with Fe2+-ascorbic acid in a homogenate of spinal cord from greyhound dogs were ascertained by measurement of the formation of malondialdehyde (MDA) and chemiluminescence in the presence of four drugs. Changes in MDA and chemiluminescence were correlated as...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(83)90338-2
更新日期：1983-09-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章,评审
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更新日期：2019-11-01 00:00:00
abstract：:Twenty-one-day-old Wistar rats were fed a diet containing 0.6% cuprizone for 2 weeks. Studies carried out after withdrawal of cuprizone showed histological evidences of marked demyelination in the corpus callosum. Biochemical studies of isolated myelin showed a marked decrease in myelin proteins, phospholipids, and ga...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2005.12.027
更新日期：2006-04-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2006.08.028
更新日期：2007-02-01 00:00:00
abstract：:The respiratory central pattern generator must respond to chemosensory cues to maintain oxygen (O2) and carbon dioxide (CO2) homeostasis in the blood and tissues. To do this, sensorial cells located in the periphery and central nervous system monitor the arterial partial pressure of O2 and CO2 and initiate respiratory...
journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1016/j.expneurol.2016.05.036
更新日期：2017-01-01 00:00:00
abstract：:Neuropathological studies of human traumatic brain injury (TBI) cases have described amyloid plaques acutely after a single severe TBI, and tau pathology after repeat mild TBI (mTBI). This has helped drive the hypothesis that a single moderate to severe TBI increases the risk of developing late-onset Alzheimer's disea...
journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1016/j.expneurol.2015.06.015
更新日期：2016-01-01 00:00:00
abstract：BACKGROUND:Intracerebral hemorrhage (ICH) is the common brain diseases in middle-aged and elderly people, with high disability and/or mortality rate, and is a serious public health concern. Both WNK3 kinase and the WNK3/SPAK/NKCC1 signaling pathway play an integral role in maintaining normal cell homeostasis. However, ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2020.113386
更新日期：2020-10-01 00:00:00
abstract：:Diffuse axonal injury is thought to be the basis of the functional impairments stemming from mild traumatic brain injury. To examine how axons are damaged by traumatic events, such as motor vehicle accidents, falls, sports activities, or explosive blasts, we have taken advantage of the spinal cord with its extensive w...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2015.04.023
更新日期：2015-09-01 00:00:00
abstract：:The precise mechanisms underlying the efficacy of intravenous immunoglobulin (IVIg) in autoimmune neurological disorders including Guillain-Barré syndrome (GBS) are not known. Anti-ganglioside antibodies have been reported to be pathogenic in some variants of GBS, and we have developed passive transfer animal models t...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2016.05.020
更新日期：2016-08-01 00:00:00
abstract：:Dentate gyrus is usually assumed to be resistant to ischemia. However, the mechanisms underlying this functional plasticity are not fully understood. Herein, we aimed at identifying a neuroprotective mechanism in the dentate gyrus of the adult rat after global ischemia. Cyclic AMP response element (CRE)-binding protei...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2006.06.016
更新日期：2006-12-01 00:00:00
abstract：:Human recombinant activated factor-VII (rFVIIa) has been used successfully in the treatment of spontaneous intracerebral hemorrhage. In addition, there is increasing interest in its use to treat uncontrolled bleeding of other origins, including trauma. The aim of this study was to evaluate the safety and potential eff...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2007.12.019
更新日期：2008-04-01 00:00:00
abstract：:Injections of horseradish peroxidase were made into surgically exposed superior cervical ganglia of Sprague-Dawley rats weighing 250 to 320 g. Anterogradely labeled postganglionic fibers were observed in the nervus conarii, pineal gland, pineal stalk, and the choroid plexus. Terminal fields were identified in lamina i...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(87)90101-4
更新日期：1987-08-01 00:00:00
