Abstract:
:The ability of altered environmental conditions to modulate some properties of synaptosomes has been studied. Incubation conditions used included the presence of methyl mercury or an organochlorine insecticide: chlordecone. Other adverse chemical conditions during incubation were the absence of calcium salts from the incubation medium or the addition of agents bringing about enhanced oxidative conditions. Synaptosomal parameters studied were the cytosolic level of free, ionic calcium, [Ca2+]i, the extent of depolarization-induced uptake of radioactive calcium, and the permeability of the limiting membrane. In addition, peroxidative activity was estimated by quantitation of thiobarbituric acid-reactive material. All these facets of synaptosomal function were responsive to the presence of these potentially deleterious changes in the incubation medium. While the response of [Ca2+]i was potentially in either direction, all adverse conditions increased synaptosomal permeability as evaluated by leakage of fura-2 into the extracellular compartment. Pretreatment with ganglioside GM1 in some situations or alpha-tocopherol in others could either wholly or partially prevent the onset of such altered synaptosomal characteristics.
journal_name
J Neurosci Resjournal_title
Journal of neuroscience researchauthors
Bondy SC,McKee Mdoi
10.1002/jnr.490250211subject
Has Abstractpub_date
1990-02-01 00:00:00pages
229-35issue
2eissn
0360-4012issn
1097-4547journal_volume
25pub_type
杂志文章abstract::Pelizaeus-Merzbacher disease (PMD) is an X-linked disorder of the central nervous system (CNS) caused by a wide variety of mutations affecting proteolipid protein 1 (PLP1). We assessed the effects of PLP1 mutations on water diffusion in CNS white matter by using diffusion tensor imaging. Twelve patients with different...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23458
更新日期:2014-12-01 00:00:00
abstract::The present study examined the effects of high-altitude exposure on the pineal gland, the main source of production of melatonin. It was surmised that hypoxia experienced at high altitude, caused by decreased oxygen tension in the ambient air, might lead to some structural alterations in the pineal gland and, hence, a...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.10136
更新日期:2002-02-15 00:00:00
abstract::Maternal stress exerts long-lasting psychiatric and somatic on offspring, which persist into adulthood. However, the effect of maternal stress on the postnatal growth of pups has not been widely reported. In this study, we found that maternal immobilization stress (IS) during lactation resulted in low body weight of m...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.22550
更新日期:2011-03-01 00:00:00
abstract::Previous studies on the NG2 chondroitin sulfate proteoglycan have shown that NG2 is expressed on A2B5-positive O2A progenitor cells, which are known to respond to platelet-derived growth factor (PDGF). In the accompanying paper (Nishiyama et al.; J Neurosci Res 43:299-314, 1996) we show that on O2A progenitors in the ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(19960201)43:3<315::AID-JNR
更新日期:1996-02-01 00:00:00
abstract::The cholinergic system takes part in the immune-neuroendocrine integration. Lymphocytes have been found to express muscarinic and nicotinic cholinergic receptors, as well as acetylcholine-esterase on their surface, and cholinergic agents modulate immune functions in vitro and in vivo. In the present study we provide e...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490350209
更新日期:1993-06-01 00:00:00
abstract::A growing body of evidence suggests that neurotrophins (NTs) play a critical role in synaptic plasticity and other activity dependent processes in the CNS. Release of these growth factors by neurons and neuroendocrine cells was recently shown to occur via the regulated secretory pathway, representing a possible mechan...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(19980215)51:4<463::AID-JNR
更新日期:1998-02-15 00:00:00
abstract::Mg2+ATPase and (Na+ + K+)ATPase activities were measured in clonal line NN hamster astroblasts and in clonal lines M1 and N1E-115 mouse neuroblastoma cells after the cells had been subjected to the acute and chronic actions of 100 mM ethanol. Exposure of the astroblasts to ethanol for periods as long as 68 days produc...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490020205
更新日期:1976-01-01 00:00:00
abstract::Phencyclidine (PCP) is a noncompetitive N-methyl-D-aspartate (NMDA) receptor antagonist. Several studies have demonstrated that chronic NMDA receptor antagonist treatment in humans and animals can cause long-term behavioral changes that are reminiscent of negative and cognitive schizophrenia-like symptoms. The muscari...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.21247
更新日期:2007-05-01 00:00:00
abstract::This essay discusses the directional movements of metazoan tissue cells generally, with special emphasis on neurons, in an attempt to show that the directional movements of all share fundamental similarities. ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.490130102
更新日期:1985-01-01 00:00:00
abstract::Mice heterozygously deficient in the major myelin component P0 are an established model of an inherited neuropathy and show signs of myelin degeneration in motor nerves. Unlike the case in patients, the sensory nerves are only mildly affected in the mouse mutants and do not show features indicative of myelin degenerat...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.10115
更新日期:2002-01-15 00:00:00
abstract::Fast-scan cyclic voltammetry (FSCV) is an established method for measuring dopamine (DA) levels in the brain in real time. However, it is difficult to discriminate DA from other monoamines such as serotonin (5-hydroxytryptamine, 5-HT) and norepinephrine (NE). We report a novel DA-specific biosensor consisting of a car...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.24193
更新日期:2018-05-01 00:00:00
abstract::The neonatal lesion with 6-hydroxydopamine (6-OHDA) in rodents induces juvenile hyperactivity and paradoxical hypolocomotor response to psychostimulants, in striking contrast to what is observed when similar lesions are carried out in adults. The early disruption of central dopaminergic pathways is followed by increas...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.20245
更新日期:2004-10-15 00:00:00
abstract::A series of AMPA [(R,S)-alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid] analogues were evaluated for activity at homomeric, heteromeric, and chimeric rat GluR1(o) and GluR3(o) receptors expressed in Xenopus oocytes, using the two-electrode voltage clamp technique. The formation of heteromeric receptor compl...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(sici)1097-4547(19970715)49:2<176::aid-jnr
更新日期:1997-07-15 00:00:00
abstract::Molecular mechanisms which underlie the heat shock response have commonly been analyzed using tissue culture systems, with less investigation of the intact mammal. In tissue culture, a temperature elevation of 5 degrees C is required to activate mammalian heat shock transcription factor 1 (HSF1) to the DNA-binding for...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(19960401)44:1<52::AID-JNR7
更新日期:1996-04-01 00:00:00
abstract::The recent recognition that the p75 neurotrophin receptor, p75((NTR)), can induce apoptotic signals has contributed to the perception that it acts primarily as a death receptor. Although the molecular mechanisms of p75(NTR) signaling remain to be fully characterized, many of the currently identified pathways activated...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/1097-4547(20000801)61:3<237::AID-JNR1>3.0.
更新日期:2000-08-01 00:00:00
abstract::The interaction of bovine white matter proteolipid apoproteins with sodium dodecyl sulfate (SDS) was studied. Equilibrium dialysis binding measurements show that the apoprotein binds approximately 1.5 gm SDS per gram protein at high ionic strength (gamma/2 = 0.17). At low ionic strength (gamma/2 = 0.01) the protein bi...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490060602
更新日期:1981-01-01 00:00:00
abstract::Neuroadaptations in the nucleus accumbens (NAc) are associated with the development of drug addiction. Plasticity in synaptic strength and intrinsic excitability of NAc medium spiny neurons (MSNs) play critical roles in addiction induced by different classes of abused drugs. However, it is unknown whether morphine exp...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23025
更新日期:2012-06-01 00:00:00
abstract::An angiotensin 2 type 1 receptor blocker, olmesartan, and a calcium channel blocker, azelnidipine, possess not only an antihypertensive effect but also an antioxidative effect and other beneficial effects. In the present study, we examined the efficacy of olmesartan and azelnidipine monotherapy (2 mg/kg or 10 mg/kg ea...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23406
更新日期:2014-10-01 00:00:00
abstract::Neural stem cells (NSCs) have great potential as a therapeutic tool for the repair of a number of CNS disorders. NSCs can either be isolated from embryonic and adult brain tissue or be induced from both mouse and human ES cells. These cells proliferate in vitro through many passages without losing their multipotential...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.10240
更新日期:2002-06-01 00:00:00
abstract::Cyclooxygenase-2 (COX-2), a key enzyme in prostanoid biosynthesis, may represent an important therapeutic target in Alzheimer's disease (AD). In the present study, we explored the regulation of COX-2 in the hippocampal formation in sporadic AD. Using semiquantitative immunocytochemical techniques, we found that in AD ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(19990801)57:3<295::AID-JNR
更新日期:1999-08-01 00:00:00
abstract::The midbrain central gray (periaqueductal gray; PAG) mediates defensive behaviors and is implicated in the rewarding effects of opiate drugs. Projections from the PAG to the ventral tegmental area (VTA) suggest that this region might also regulate behaviors involving motivation and cognition. However, studies have not...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.22265
更新日期:2010-04-01 00:00:00
abstract::The osteoinductive capacity of biological noncellular material has been widely recognized. Studies using bone morphogenetic proteins and acellular bone matrix demonstrate that host mesenchymal cells can be readily transformed into osteoprogenitor cells. The current study sought to determine whether another biological ...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.23505
更新日期:2015-03-01 00:00:00
abstract::Electrical activity shapes development of the nervous system, presumably in part by regulating gene expression. A set of regulatory genes, immediate early genes (IEGs), which are responsive to a number of extrinsic cellular stimuli have been proposed to play a role in coupling such activity to gene expression. Using a...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490350502
更新日期:1993-08-01 00:00:00
abstract::It is known that expression of glial fibrillary acidic protein (GFAP) as an astrocyte-specific marker can be regulated by levels of circulating gonadal steroids during postnatal development. In addition, astrocytes play an important role in the physiology of the hippocampus, a brain region considered sexually dimorphi...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.20372
更新日期:2005-02-15 00:00:00
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.1128
更新日期:2001-07-01 00:00:00
abstract::Ex vivo gene therapy is emerging as a promising approach for the treatment of neurodegenerative diseases and central nervous system (CNS) trauma. We have shown previously that human adult astrocytes can be expanded in vitro and can express various therapeutic transgenes (Ridet et al. [1999] Hum. Gene Ther. 10:271-280;...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.10617
更新日期:2003-06-15 00:00:00
abstract::In the following review, we address difficulties that have arisen when attempting to convert the myelin multilayers into vesicles. The emphasis is on CNS myelin of adult mammals although both central nervous system (CNS) and peripheral nervous system (PNS) myelin are considered. The ability to prepare vesicle of myeli...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
doi:10.1002/jnr.490410202
更新日期:1995-06-01 00:00:00
abstract::Plexiform layer synaptic and photoreceptor cell components were investigated in retinas of Royal College of Surgeons (RCS) dystrophic rats transplanted with normal retinal pigment epithelial (RPE) cells by immunocytochemistry using previously characterized monoclonal antibodies. In retinas of normal adult rats and RPE...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490360408
更新日期:1993-11-01 00:00:00
abstract::We have shown that ethanol exposure during embryogenesis affects a variety of parameters of neuronal growth. In this study we examined the direct effects of ethanol exposure on developing neuroblasts in culture. Neuroblast-enriched cultures derived from 3-day-old whole chick embryos were grown in the presence of ethan...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490300305
更新日期:1991-11-01 00:00:00
abstract::Oligomeric forms of α-synuclein are believed to cause mitochondrial injury, which may contribute to neurotoxicity in Parkinson's disease (PD). Here oligomers of α-synuclein were prepared using the dopamine metabolite, DOPAL (3,4-dihydroxyphenyl-acetaldehyde), in the presence of guanidinium hydrochloride. Electron micr...
journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.24513
更新日期:2019-12-01 00:00:00