Abstract:
:Action potential-dependent release of synaptic vesicles and short-term synaptic plasticity are dynamically regulated by the endogenous Ca(2+) buffers that shape [Ca(2+)] profiles within a presynaptic bouton. Calmodulin is one of the most abundant presynaptic proteins and it binds Ca(2+) faster than any other characterized endogenous neuronal Ca(2+) buffer. Direct effects of calmodulin on fast presynaptic Ca(2+) dynamics and vesicular release however have not been studied in detail. Using experimentally constrained three-dimensional diffusion modeling of Ca(2+) influx-exocytosis coupling at small excitatory synapses we show that, at physiologically relevant concentrations, Ca(2+) buffering by calmodulin plays a dominant role in inhibiting vesicular release and in modulating short-term synaptic plasticity. We also propose a novel and potentially powerful mechanism for short-term facilitation based on Ca(2+)-dependent dynamic dislocation of calmodulin molecules from the plasma membrane within the active zone.
journal_name
Front Cell Neuroscijournal_title
Frontiers in cellular neuroscienceauthors
Timofeeva Y,Volynski KEdoi
10.3389/fncel.2015.00239subject
Has Abstractpub_date
2015-07-01 00:00:00pages
239issn
1662-5102journal_volume
9pub_type
杂志文章abstract::Exposing developing cerebellar Purkinje neurons (PNs) to mutant Ataxin1 (ATXN1) in 82Q spinocerebellar ataxia type 1 (SCA1) mice disrupts motor behavior and cerebellar climbing fiber (CF) architecture from as early as 4 weeks of age. In contrast, if mutant ATXN1 expression is silenced until after cerebellar developmen...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2017.00292
更新日期:2017-09-20 00:00:00
abstract::Recent advances in fast volumetric imaging have enabled rapid generation of large amounts of multi-dimensional functional data. While many computer frameworks exist for data storage and analysis of the multi-gigabyte Ca2+ imaging experiments in neurons, they are less useful for analyzing Ca2+ dynamics in astrocytes, w...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2018.00098
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abstract::Autoreactive T cells that infiltrate into the central nervous system (CNS) are believed to have a significant role in mediating the pathology of neuroinflammatory diseases like multiple sclerosis. Their interaction with microglia and astrocytes in the CNS is crucial for the regulation of neuroinflammatory processes. O...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2018.00352
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abstract::In relapsing-remitting multiple sclerosis (RRMS) subtype, the patient's brain itself is capable of repairing the damage, remyelinating the axon and recovering the neurological function. Cerebrospinal fluid (CSF) is in close proximity with brain parenchyma and contains a host of proteins and other molecules, which infl...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2017.00209
更新日期:2017-07-18 00:00:00
abstract::In recent years, P2X receptors have attracted increasing attention as regulators of exocytosis and cellular secretion. In various cell types, P2X receptors have been found to stimulate vesicle exocytosis directly via Ca(2+) influx and elevation of the intracellular Ca(2+) concentration. Recently, a new role for P2X4 r...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fncel.2013.00171
更新日期:2013-10-08 00:00:00
abstract::From the VGF precursor protein originate several low molecular weight peptides, whose distribution in the brain and blood circulation is not entirely known. Among the VGF peptides, those containing the N-terminus portion were altered in the cerebro-spinal fluid (CSF) and hypothalamus of schizophrenia patients. "Hence,...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2017.00158
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abstract::Epilepsy is a disorder of abnormal brain activity typified by spontaneous and recurrent seizures. MicroRNAs (miRNAs) are short non-coding RNAs, critical for the post-transcriptional regulation of gene expression. MiRNA dysregulation has previously been implicated in the induction of epilepsy. In this study, we examine...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2019.00145
更新日期:2019-04-12 00:00:00
abstract::To find satisfactory treatment strategies for neuropathic pain syndromes, the cellular mechanisms should be illuminated. Central sensitization is a generator of pain hypersensitivity, and is mainly reflected in neuronal hyperexcitability in pain pathway. Neuronal excitability depends on two components, the synaptic in...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2018.00436
更新日期:2018-11-21 00:00:00
abstract::The Golgi cells have been recently shown to beat regularly in vitro (Forti et al., 2006. J. Physiol. 574, 711-729). Four main currents were shown to be involved, namely a persistent sodium current (I(Na-p)), an h current (I(h)), an SK-type calcium-dependent potassium current (I(K-AHP)), and a slow M-like potassium cur...
journal_title:Frontiers in cellular neuroscience
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doi:10.3389/neuro.03.002.2007
更新日期:2007-12-30 00:00:00
abstract::Chronic pain is accompanied with long-term sensory, affective and cognitive disturbances. What are the mechanisms that mediate the long-term consequences of painful experiences and embed them in the genome? We hypothesize that alterations in DNA methylation, an enzymatic covalent modification of cytosine bases in DNA,...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2015.00088
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abstract::Nitric oxide is a unique neurotransmitter, which participates in many physiological and pathological processes in the organism. There are little data about the neuronal nitric oxide synthase immunoreactivity in the spinal cord of amphibians. In this respect, the present study aims to investigate the distribution of ni...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2014.00299
更新日期:2014-09-25 00:00:00
abstract::The differentiated state of spinal cord ependymal cells in regeneration-competent amphibians varies between a constitutively active state in what is essentially a developing organism, the tadpole of the frog Xenopus laevis, and a quiescent, activatable state in a slowly growing adult salamander Ambystoma mexicanum, th...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2018.00045
更新日期:2018-02-27 00:00:00
abstract::A major consequence of traumatic brain and spinal cord injury is the loss of the myelin sheath, a cholesterol-rich layer of insulation that wraps around axons of the nervous system. In the central nervous system (CNS), myelin is produced and maintained by oligodendrocytes. Damage to the CNS may result in oligodendrocy...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fncel.2020.619707
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abstract::Risk of hemorrhagic transformation, incomplete reperfusion, neurotoxicity, and a short treatment time window comprises major challenges for tissue plasminogen activator (tPA) thrombolytic stroke therapy. Improving tPA therapy has become one of the highest priorities in the stroke field. This mini review article focuse...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fncel.2015.00397
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abstract::The Hessian fly, Mayetiola destructor Say (Diptera, Cecidomyiidae), is a pest of wheat and belongs to a group of gall-inducing herbivores. This species has a unique life history and several ecological features that differentiate it from other Diptera such as Drosophila melanogaster and blood-feeding mosquitoes. These ...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2016.00212
更新日期:2016-09-07 00:00:00
abstract::Neural stem cells in the subventricular zone (SVZ) of the lateral ventricle of adult rodent brain generate oligodendrocyte progenitor cells (OPCs) that disperse throughout the corpus callosum and striatum where some of OPCs differentiate into mature oligodendrocytes. Studies in animal models of stroke demonstrate that...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fncel.2013.00201
更新日期:2013-10-29 00:00:00
abstract::The complex and elaborate architecture of a neuron poses a great challenge to the cellular machinery which localizes proteins and organelles, such as mitochondria, to necessary locations. Proper mitochondrial localization in neurons is particularly important as this organelle provides energy and metabolites essential ...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fncel.2019.00373
更新日期:2019-08-09 00:00:00
abstract::GABA transporters belong to a large family of neurotransmitter:sodium symporters. They are widely expressed throughout the brain, with different levels of expression in different brain regions. GABA transporters are present in neurons and in astrocytes and their activity is crucial to regulate the extracellular concen...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fncel.2014.00161
更新日期:2014-06-17 00:00:00
abstract::Microglial activation is a key pathogenic process at the onset of Alzheimer's disease (AD). Identifying regulators of microglial activation bears great potential in elucidating causes and mechanisms of AD and determining candidates for early intervention. Previous studies demonstrate abnormal elevation of glutaminase ...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2019.00264
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journal_title:Frontiers in cellular neuroscience
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journal_title:Frontiers in cellular neuroscience
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journal_title:Frontiers in cellular neuroscience
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doi:10.3389/fncel.2014.00344
更新日期:2014-10-21 00:00:00
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journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2019.00078
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abstract::Amyotrophic Lateral Sclerosis (ALS) is a progressive and fatal neurodegenerative disease affecting both upper and lower motor neurons. The molecular mechanisms underlying disease pathogenesis remain largely unknown. Multiple genetic loci including genes involved in proteostasis and ribostasis have been linked to ALS p...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fncel.2017.00243
更新日期:2017-08-17 00:00:00
abstract::Glia, a non-excitable cell type once considered merely as the connective tissue between neurons, is nowadays acknowledged for its essential contribution to multiple physiological processes including learning, memory formation, excitability, synaptic plasticity, ion homeostasis, and energy metabolism. Moreover, as glia...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2020.00278
更新日期:2020-08-21 00:00:00
abstract::The intact synaptic structure is critical for information processing in neural circuits. During synaptic transmission, rapid vesicle exocytosis increases the size of never terminals and endocytosis counteracts the increase. Accumulating evidence suggests that SV exocytosis and endocytosis are tightly connected in time...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fncel.2018.00066
更新日期:2018-03-14 00:00:00
abstract::Increasing evidence suggest that astrocytes significantly modulate neuronal function at the level of the tripartite synapse both in physiological and pathophysiological conditions. The global control of the astrocytic syncytium over neuronal networks, however, is still less recognized. Here we examined astrocytic sign...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2015.00215
更新日期:2015-06-18 00:00:00
abstract::Stress affects brain areas involved in learning and emotional responses, which may contribute in the development of cognitive deficits associated with major depression. These effects have been linked to glial cell activation, glutamate release and changes in neuronal plasticity and survival including atrophy of hippoc...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2015.00102
更新日期:2015-04-02 00:00:00
abstract::In the last decade, there is an increasing application of induced pluripotent stem cells (iPSCs) for disease modeling. The iPSC technology enables the study of patient-specific neuronal cell lines in vitro to evaluate dysfunction at the cellular level and identify the responsible genetic factors. This approach might b...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2018.00321
更新日期:2018-09-25 00:00:00
abstract::Natural products have attracted interest in the search for new and effective analgesics and coadjuvant approaches to several types of pain. It is in fact well known that many of their active ingredients, such as anthocyanins (ACNs) and polyphenols, can exert potent anti-inflammatory actions. Nevertheless, their potent...
journal_title:Frontiers in cellular neuroscience
pub_type: 杂志文章
doi:10.3389/fncel.2018.00378
更新日期:2018-11-05 00:00:00