Abstract:
:Ascorbate is an antioxidant vitamin that is found in high concentrations in the brain which seems to have neuroprotective properties in some experimental models of excitotoxic neurological disorders, including convulsive behavior and reactive species-related damage. In this study we tested whether ascorbate (30, 100 or 300 mg/kg, i.p.) protects against the convulsions, protein carbonylation and inhibition of Na(+),K(+)-ATPase activity induced by pentylenetetrazol (PTZ; 1.8 micromol/striatum), a classical convulsant agent that has been fairly used for the study of epilepsy and screening of new compounds with antiepileptic activity. The intrastriatal injection of PTZ caused convulsive behavior in a dose-dependent manner and an increase in the total protein carbonyl content of the injected striatum. However, duration of PTZ-induced convulsive episodes did not correlate with protein carbonyl content of the injected striatum. Ascorbate, at high doses (300 mg/kg), protected against PTZ-induced convulsions, protein carbonylation and inhibition of Na(+),K(+)-ATPase activity in the rat striatum, further suggesting a anticonvulsant and neuroprotective role for this vitamin. Conversely, intermediate doses of ascorbate (100 mg/kg) potentiated the duration of the convulsive episodes, but had no additive effects on protein carbonylation or Na(+),K(+)-ATPase activity inhibition induced by PTZ. Low doses of ascorbate (30 mg/kg) prevented PTZ-induced increase of total striatal carbonyl protein content, but did not alter PTZ-induced convulsions and Na(+),K(+)-ATPase activity inhibition. Collectively, these data indicate that the anticonvulsant activity of ascorbate is not related to its antioxidant action and support a dual role for this compound as a neuroprotective agent, since while it protects against PTZ-induced cellular oxidative damage, it has a biphasic effect on PTZ-induced convulsions.
journal_name
Neurosciencejournal_title
Neuroscienceauthors
Schneider Oliveira M,Flávia Furian A,Freire Royes LF,Rechia Fighera M,de Carvalho Myskiw J,Gindri Fiorenza N,Mello CFdoi
10.1016/j.neuroscience.2004.07.012keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
721-8issue
4eissn
0306-4522issn
1873-7544pii
S0306-4522(04)00607-4journal_volume
128pub_type
杂志文章相关文献
NEUROSCIENCE文献大全abstract::Imaging genetics has emerged as a powerful and sensitive approach to the study of functional genetic variations and brain responses in psychiatric and neurologic disorders. Ethics issues in contemporary neuroscience as they apply separately to genetics and neuroimaging have been a growing focus for research but, to da...
journal_title:Neuroscience
pub_type: 杂志文章,评审
doi:10.1016/j.neuroscience.2009.01.052
更新日期:2009-11-24 00:00:00
abstract::Neural proliferation in the dentate gyrus (DG) is closely linked with learning and memory, but the transcriptional programming that drives adult proliferation remains incompletely understood. Our lab previously elucidated the critical role of the transcription factor ΔFosB in the dorsal hippocampus (dHPC) in learning ...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2019.03.022
更新日期:2019-05-15 00:00:00
abstract::Tumor necrosis factor is a potent activator of myeloid cells, which acts via two cell-surface receptors, the p55 and p75 tumor necrosis factor receptors. The present study describes the cellular distribution of both receptor messenger RNAs across the rat brain under basal conditions and in response to systemic injecti...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/s0306-4522(99)00225-0
更新日期:1999-01-01 00:00:00
abstract::Throughout rat embryogenesis we analysed the expression patterns of the three mature transcripts generated from the two calcitonin gene-related peptide genes: calcitonin, alpha-calcitonin gene-related peptide, and beta-calcitonin gene-related peptide messenger RNAs. In addition, we examined in parallel the distributio...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/s0306-4522(98)00730-1
更新日期:1999-01-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to investigate whether an objective measure of freezing of gait (FOG) using a validated alternating stepping in place (SIP) task, is related to executive and/or visuospatial cognitive impairment in Parkinson's disease (PD). METHODS:We studied prospectively 30 PD subjects with the U...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2012.07.007
更新日期:2012-09-27 00:00:00
abstract::Fifteen percent to 35% of the United States population experiences tinnitus, a subjective "ringing in the ears". Up to 10% of those afflicted report severe and disabling symptoms. Tinnitus was induced in rats using unilateral, 1 h, 17 kHz-centered octave-band noise (116 dB SPL) and assessed using a gap-startle method....
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2009.08.026
更新日期:2009-12-01 00:00:00
abstract::Cerebellar granule cells in culture develop survival requirements which can be met either by chronic membrane depolarization (25 mM K+) or by stimulation of ionotropic excitatory amino acid receptors. We observed previously that this trophic effect is mediated via Ca2+ influx, either through dihydropyridine-sensitive,...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(93)90108-r
更新日期:1993-11-01 00:00:00
abstract::Previous studies have shown oxidative damage resulting from amyloid Abeta exposure to cultured cells and in murine models. A target of oxidation is 14-3-3 which comprises a group of proteins involved in kinase activation and chaperone activity. The present study shows glycoxidative damage, as revealed with mono and bi...
journal_title:Neuroscience
pub_type: 杂志文章,收录出版
doi:10.1016/j.neuroscience.2007.03.013
更新日期:2007-06-08 00:00:00
abstract::Co-localization of neurotensin and cholecystokinin in tyrosine hydroxylase-containing neurons in the nucleus tractus solitarius of the rat was demonstrated by immunocytochemistry with fluorescent double-staining combined with the peroxidase-antiperoxidase method. Co-localization of neurotensin/tyrosine hydroxylase or ...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(88)90326-0
更新日期:1988-01-01 00:00:00
abstract::TREK-1 is a member of the two-pore-domain potassium channel family which is expressed predominantly in the CNS. Using an anti-peptide polyclonal antiserum, we have determined the distribution of TREK-1 in the brain and spinal cord of adult rats. Specificity of the antiserum was tested using a TREK-1-transfected cell l...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/s0306-4522(01)00030-6
更新日期:2001-01-01 00:00:00
abstract::Dephosphorylation by the Ca2+/calmodulin-dependent phosphatase calcineurin has been suggested as an important mechanism of Ca2+-dependent inactivation of voltage-gated Ca2+ channels. We have tested whether calcineurin plays a role in the inactivation process of two types of high-voltage-activated Ca2+ channels (L and ...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/s0306-4522(99)00434-0
更新日期:2000-01-01 00:00:00
abstract::Detailed analysis of a novel transgenic model of basal ganglia disease has been undertaken. In this model the expression of an attenuated form of the diphtheria toxin gene was tightly controlled by D1 dopamine receptor regulatory domains. The behavioral and both direct toxin-mediated and transneuronal effects observed...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/s0306-4522(99)00498-4
更新日期:2000-01-01 00:00:00
abstract::Mutations in γ-aminobutyric acid A receptor (GABAA) subunits and sodium channel genes, especially GABRG2 and SCN1A, have been reported to be associated with febrile seizures (FS) and genetic epilepsy with febrile seizures plus (GEFS+). GEFS+ is a well-known family of epileptic syndrome with autosomal dominant inherita...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2020.04.049
更新日期:2020-07-01 00:00:00
abstract::The mirror neuron system (MNS) is currently one of the most prominent areas of research in neuroscience. Some of the work has focused on the identification of factors that modulate its activity, but until now, no one has tried to identify the effect of motor ability on the MNS regions. The aim of the present work is t...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2014.06.010
更新日期:2014-09-05 00:00:00
abstract::Substance P is an important neuropeptide neurotransmitter in the central, autonomic and enteric nervous systems. In sympathetic ganglia, substance P is thought to play a role in modulating synaptic transmission. Release of substance P by neuronal stimulation or direct application of substance P to ganglionic neurons i...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/s0306-4522(97)00027-4
更新日期:1997-08-01 00:00:00
abstract::Acute intermittent hypoxia (AIH) induces phrenic long-term facilitation (pLTF) by a mechanism that requires spinal serotonin (5-HT) receptor activation and NADPH oxidase (NOX) activity. Here, we investigated whether: (1) spinal nitric oxide synthase (NOS) activity is necessary for AIH-induced pLTF; (2) episodic exogen...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2014.03.014
更新日期:2014-06-06 00:00:00
abstract::The hemispheric content of dopamine and its metabolites in the frontal cortex, caudatus putamen and nucleus accumbens septi was evaluated in relation to behavioral lateralization assessed by paw preference. Three groups of C3H/He mice were selected on the basis of their performance in the paw preference test (left-han...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(94)00401-p
更新日期:1995-01-01 00:00:00
abstract::Developmental or degenerative damage of the neuronal architecture in the entorhinal cortex may disintegrate a functional part of hippocampal input since the entorhinal cortex provides a major source of neocortical and subcortical input to the hippocampus. These alterations, such as seen in Alzheimer's disease, schizop...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(93)90034-d
更新日期:1993-12-01 00:00:00
abstract::Conduction time is typically ignored in computational models of neural network function. Here we consider the effects of conduction delays on the synchrony of neuronal activity and neural oscillators, and evaluate the consequences of allowing conduction velocity (CV) to be regulated adaptively. We propose that CV vari...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2013.11.007
更新日期:2014-09-12 00:00:00
abstract::The bladder and distal colon are innervated by lumbar splanchnic (LSN) and pelvic nerves (PN) whose axons arise from dorsal root ganglia (DRG) neurons at thoracolumbar (TL) and lumbosacral (LS) spinal levels, respectively. In an attempt to understand the molecular basis of differences between LSN and PN mechanosensiti...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2011.04.049
更新日期:2011-07-14 00:00:00
abstract::GABA(B) receptors are G-protein-coupled receptors mediating the slow onset and prolonged synaptic actions of GABA in the CNS. The recent cloning of two genes, GABA(B1) and GABA(B2), has revealed a novel requirement for GABA(B) receptor signalling. Studies have demonstrated that the two receptor subunits associate as a...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/s0306-4522(01)00296-2
更新日期:2001-01-01 00:00:00
abstract::Metabolic activity was mapped in the cerebellar cortex and its major inputs and projection targets in monkeys performing visually guided reaching with the left forelimb. Normal monkeys and monkeys deprived of visual input to the right cerebral hemisphere by right optic tract section, combined in some cases with forebr...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(96)00258-8
更新日期:1996-11-01 00:00:00
abstract::Treatment of P19 embryonal carcinoma cells with retinoic acid induces their differentiation into a population of cells consisting of neurons and other cell types normally derived from neuroectoderm. We used immunohistological and histochemical techniques to identify some of the neurotransmitters in the P19-derived neu...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(94)90451-0
更新日期:1994-02-01 00:00:00
abstract::Insulin peptide, acting through tyrosine kinase receptor pathways, contributes to nerve development or repair. In this work, we examined the direction, impact and repertoire of insulin signaling in vivo during peripheral nerve regeneration in rats. First, we demonstrated that insulin receptor is expressed on lumbar do...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2005.11.065
更新日期:2006-05-12 00:00:00
abstract::Neuropathic pain resulting from spinal cord injury is often accompanied by maladaptive plasticity of the central nervous system, including the opioid receptor-rich periaqueductal gray (PAG). Evidence suggests that sensory signaling via the PAG is robustly modulated by dopamine D1- and D2-like receptors, but the effect...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2016.11.040
更新日期:2017-02-20 00:00:00
abstract::Nerve cells have been found in hydra, which react with antisera to oxytocin, vasopressin and mesotocin. These nerve cells have a high density in the ectoderm of basal disk and tentacles and lower density in the ectoderm of peduncle, gastric region and hypostome. A very small number of nerve cells occur also in the end...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(82)90241-x
更新日期:1982-01-01 00:00:00
abstract::Whole-cell recordings were made from neurons of the rat locus coeruleus in a tissue slice removed from rat brain. Substance P caused an inward current in cells voltage-clamped at -60 mV. The effect of substance P was concentration-dependent (30 nM-3 microM) and was mimicked by similar concentrations of substance K and...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(92)90428-5
更新日期:1992-09-01 00:00:00
abstract::Neurons in the hypothalamic arcuate nucleus (arcuate neurons) were traced on Golgi-impregnated sections. Dendrites of arcuate neurons showed characteristic orientation patterns. Dendrites along the lateral side follow the convex border of the nucleus by running parallel to the tanycyte processes. Neurons located in th...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/0306-4522(85)90005-3
更新日期:1985-10-01 00:00:00
abstract::In vivo voltammetry was used to study the effects of basolateral amygdala dopamine depletion on stress-induced dopamine release in the nucleus accumbens and medial prefrontal cortex. Male Long-Evans rats received bilateral microinjections of 6-hydroxydopamine or vehicle into the basolateral amygdala. Changes in dopami...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/s0306-4522(02)00553-5
更新日期:2003-01-01 00:00:00
abstract::The chemoanatomical organization of the visual sector of the cat's thalamic reticular nucleus (TRN)-that is at the dorsal lateral geniculate nucleus (dLGN) and at the pulvinar nucleus (Pul)-was investigated with two novel cytoarchitectonic markers. The Wisteria floribunda agglutinin (WFA) binding reaction visualized t...
journal_title:Neuroscience
pub_type: 杂志文章
doi:10.1016/j.neuroscience.2009.11.010
更新日期:2010-02-03 00:00:00