Abstract:
:Long-term potentiation (LTP), a model of activity-dependent synaptic plasticity and of certain forms of memory, comprises the persistent enhancement of excitatory neurotransmission that results from high-frequency activation. A presynaptic component of LTP is thought to be modulated by a retrograde messenger generated by the postsynaptic neuron. Arachidonic acid, nitric oxide, carbon monoxide and PAF have each been proposed as retrograde messengers in LTP, but arachidonic acid, unlike PAF, requires NMDA receptor activation. A PAF antagonist (BN 52021) that provides neuroprotection in ischemia-reperfusion displaces [3H] PAF bound to presynaptic membranes, blocks PAF-induced glutamate exocytosis and inhibits LTP. An antagonist selective for the intracellular PAF binding site (BN 50730) did not affect LTP, nor did BN 52021 modify NMDA currents. LTP was induced with weak synaptic stimulation coupled with postsynaptically administered enzyme resistant mcPAF. Theta-burst stimulation (10 min) after bath applications of mcPAF (1 microM) induced APV-independent LTP that was blocked by 5 microM BN 52021. When this antagonist was infused into the hippocampus before or immediately after training, it impaired memory of inhibitory avoidance training in the rat. Memory was not altered if the antagonist is infused 30 or 60 min after training. Moreover, mcPAF enhances memory on retention test performance of step-down inhibitory avoidance habituation and learning in rats. Also, memory was studied using a caudate nucleus-dependent cued water maze task. Rats received an 8 trial (30 s intertrial interval) training session in which a visible cued escape platform was located in a different quadrant of the maze of each trial. Following trial 8, the rats received a unilateral post-training intra-caudate injection of mcPAF (1 microgram/0.5 microliter), BN 52021 (0.5 microgram/0.5 microliter) or vehicle. On a retention test session 24 h later, latency to mount the escape platform was used as a measure of memory. The retention test escape latencies of rats given mcPAF were significantly lower than those of the vehicle-injected controls, indicating a memory enhancing effect of mcPAF. Injection of mcPAF did not affect retention when administered 2 h post-training, indicating a time-dependent effect of mcPAF on memory. The latencies for animals injected with BN 52021 were significantly higher than those of the controls, indicating that antagonism of endogenous PAF impairs memory. The findings show that PAF plays a role in memory formation in a caudate-mediated cued discrimination task. Administration of BN 52021 2 h post-training had no affect on retention, indicating a time-dependent effect of endogenous PAF on memory formation. PAF, the most potent bioactive lipid known, modulates excitatory synaptic transmission, neuronal plasticity and memory. When PAF production is overstimulated as in seizures or ischemia, it becomes neurotoxic.
journal_name
Neurochem Intjournal_title
Neurochemistry internationalauthors
Bazan NG,Packard MG,Teather L,Allan Gdoi
10.1016/s0197-0186(96)00020-4subject
Has Abstractpub_date
1997-02-01 00:00:00pages
225-31issue
2eissn
0197-0186issn
1872-9754pii
S0197018696000204journal_volume
30pub_type
杂志文章,评审abstract::Apart from acetyl-choline (Ach), adenosine-5'-trisphosphate (ATP) is thought to play a role in neuromuscular function, however little information is available on its cellular physiology. As such, effects of ATP and adenosine on contractility of mice diaphragmatic and skeletal muscles (m. extensor digitorum longa-MEDL)...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2006.06.007
更新日期:2006-12-01 00:00:00
abstract::A possible modulatory role of kinases on voltage sensitive Na+ channels of presynaptic brain nerve endings was investigated by testing the effect of several kinase activators and inhibitors on the elevation of [Nai] induced by veratridine in mouse brain synaptosomes loaded with a selective Na+ indicator dye. Veratridi...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/s0197-0186(97)00065-x
更新日期:1998-02-01 00:00:00
abstract::Protein kinase C (PKC) is involved in several cell events including proliferation, survival and differentiation. The aim of this work was to investigate the role of PKC activation on retinal cells proliferation. We demonstrated that PKC activation by phorbol 12-myristate 13-acetate (PMA), a tumor promoter phorbol este...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/s0197-0186(02)00059-1
更新日期:2003-01-01 00:00:00
abstract::High-affinity binding sites for tritiated hemicholinium-3, a potent and selective inhibitor of the sodium-dependent high-affinity choline transport, have been found in synaptosomal membranes from insect ganglia. The binding of hemicholinium to ganglionic membrane preparations was saturable and specific with an apparen...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(89)90124-1
更新日期:1989-01-01 00:00:00
abstract::Unveiling the roles of distinct cell types in brain response to insults is a partially unsolved challenge and a key issue for new neuroreparative approaches. In vivo models are not able to dissect the contribution of residential microglia and infiltrating blood-borne monocytes/macrophages, which are fundamentally undi...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2014.01.008
更新日期:2014-01-01 00:00:00
abstract::On the basis of abnormal neuropsychological behavior in the open-field test after 2-week zinc deprivation, neurochemical response was examined in young mice fed a zinc-deficient diet for 2 weeks. Serum corticosterone concentration was markedly higher in zinc-deficient mice than in the control mice. Basal signals of in...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2007.06.021
更新日期:2008-01-01 00:00:00
abstract::The results of the present study showed the presence of a high-affinity and saturable binding of [3H]-ketanserin to frontal and parietal brain membranes obtained postmortem from bipolar, depressed, schizophrenic patients and normal controls. The human brain samples (60 frontal cortex and 51 parietal cortex), were dona...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/s0197-0186(02)00093-1
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abstract::There has been limited success with blood-based biomarkers of neurodegeneration. One perceived reason is that blood has no direct contact to the brain. Recently developed blood-based biomarkers of tau-degradation have shown promise as potential tools for peripheral assessment of neurodegeneration; however, factors con...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2017.05.002
更新日期:2017-09-01 00:00:00
abstract::Diabetic mice exhibit increased mortality and morbidity following stroke. Recent studies from our laboratory have indicated that increased morbidity in diabetic db/db mice relative to their non-diabetic db/+ littermates is associated with increased levels of MMP-9 protease activity, increased blood-brain barrier (BBB)...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2020.104790
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abstract::1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), an inducer of parkinsonism, causes degeneration of nigro-striatal dopaminergic neurons by producing its neurotoxic metabolite, 1-methyl-4-phenylpiridium ion (MPP+), by monoamine oxidase B in glial cells. We used PC12 (rat pheochromocytoma cell line) as a model cell ...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(94)90017-5
更新日期:1994-11-01 00:00:00
abstract::Evidences have indicated a high degree of comorbidity of alcoholism and depression. N-acetylcysteine (NAC) has shown its clinical efficiency in the treatment of several psychiatric disorders and is identified as a multi-target acting drug. The ability of NAC to prevent alcohol abstinence-induced depression-like effect...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2018.04.011
更新日期:2018-09-01 00:00:00
abstract::Cortical cells from embryonic mice (E17) showed a rapid cell-death under the serum-free condition. The addition of nefiracetam at 0.1-10 microM increased the survival activity, while aniracetam at the same concentrations did not. The cell death was characterized to be apoptotic, since dead cells showed nuclear condens...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/s0197-0186(01)00080-8
更新日期:2002-02-01 00:00:00
abstract::Rapid eye movement sleep deprivation is associated with an increase in Na-K ATPase activity. In order to understand the possible biochemical mechanism of this increase, the kinetics of Na-K ATPase was studied. Although the enzyme activity increased after the deprivation, the catalytic efficiency of the enzyme remained...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/s0197-0186(99)00121-7
更新日期:2000-03-01 00:00:00
abstract::Ethanol (15% v/v) was administered in the drinking water to male Wistar rats over period of 3 months. Binding properties of muscarinic receptors were studied in synaptosomes from selected brain areas using [(3)H]quinuclidinyl benzilate and its displacement by the selective antagonist, pirenzepine and the agonist, carb...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(88)90027-7
更新日期:1988-01-01 00:00:00
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journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(94)90045-0
更新日期:1994-07-01 00:00:00
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journal_title:Neurochemistry international
pub_type: 杂志文章,评审
doi:10.1016/j.neuint.2012.12.006
更新日期:2013-04-01 00:00:00
abstract::In recent years there has been a great deal of research within the stem cell field which has led to the definition and classification of a range of stem cells from a plethora of tissues and organs. Stem cells, by classification, are considered to be pluri- or multipotent and have both self-renewal and multi-differenti...
journal_title:Neurochemistry international
pub_type: 杂志文章,评审
doi:10.1016/j.neuint.2016.08.001
更新日期:2017-06-01 00:00:00
abstract::Stroke is the third leading cause of death and the leading cause of adult disability in the industrialized nations. One of the consequences of stroke is blood-brain barrier (BBB) leakage and subsequent edema, which is one of the causes of mortality in this pathology. Aquaporin-4 (AQP4) is the most abundant water chann...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2007.10.004
更新日期:2008-03-01 00:00:00
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journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(80)90065-0
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journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2014.07.004
更新日期:2014-10-01 00:00:00
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journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(89)90097-1
更新日期:1989-01-01 00:00:00
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journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(84)90082-2
更新日期:1984-01-01 00:00:00
abstract::Long-term (12 h) incubation of NCB-20 neuroblastoma x Chinese hamster brain cell hybrid cells with phorbol dibutylate caused a decrease in the enzyme activity of protein kinase C (PKC). Under these conditions, the formation of inositol 1,4,5-trisphosphate [Ins(1,4,5)P(3)] and the mobilization of intracellular Ca(2+) t...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(91)90175-d
更新日期:1991-01-01 00:00:00
abstract::The sensitivity of [(3)H]GABA and [(3)H]muscimol high-affinity binding sites to physiological (Krebs-Ringer's bicarbonate) and non-physiological (Tris-citrate) buffers was examined using synaptosomal membranes from bovine retinas. The maximum number of sites (B(max)) for [(3)H]GABA was present when the tissue was assa...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(86)90167-1
更新日期:1986-01-01 00:00:00
abstract::The influx of extracellular Zn(2+) into dentate granule cells is nonessential for dentate gyrus long-term potentiation (LTP) and the physiological significance of extracellular Zn(2+) dynamics is unknown in the dentate gyrus. Excess increase in extracellular Zn(2+) in the hippocampal CA1, which is induced with excitat...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/j.neuint.2015.05.006
更新日期:2015-08-01 00:00:00
abstract::Traumatic brain injury (TBI) is one of the major cause of morbidity and mortality and it affects more than 1.7 million Americans each year. Depending on its location and severity, TBI leads to structural and functional damage in several parts of the brain such as cranial nerves, optic nerve tract or other circuitry in...
journal_title:Neurochemistry international
pub_type: 杂志文章,评审
doi:10.1016/j.neuint.2017.01.019
更新日期:2017-12-01 00:00:00
abstract::The onset of attention-deficit-hyperactivity-disorder (ADHD) in childhood is characterized by developmentally inappropriate levels of hyperactivity, impulsivity and inattention. A chronic deficit of serotonin (5-HT) at the synapse may trigger symptoms of ADHD. This review focuses on neuro-anatomical, experimental and ...
journal_title:Neurochemistry international
pub_type: 杂志文章,评审
doi:10.1016/j.neuint.2015.02.001
更新日期:2015-03-01 00:00:00
abstract::The present studies were performed in order to examine the possible role of cyclic GMP-stimulated phosphodiesterase (cGMP-PDE) activity in the inhibitory action of the inflammatory peptide bradykinin on cyclic AMP (cAMP) accumulation in D384 cells. Bradykinin decreased the forskolin-stimulated cAMP accumulation in the...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(92)90149-l
更新日期:1992-09-01 00:00:00
abstract::Using specific antibodies to met-enkephalin, met-enkephalin-Arg(6)-Phe(7) and met-enkephalin-Arg(6)-Gly(7)-Leu(8), we have studied the distribution of these opioid peptides in the frog adrenal gland by means of the indirect immunofluorescence technique. Bright staining of all chromaffin cells was observed by applicati...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(86)90004-5
更新日期:1986-01-01 00:00:00
abstract::Recent in vitro studies have revealed that benzodiazepines, opiates, barbiturates and ethanol might influence GABA binding to CNS membrane sites. Further studies of such interactions might be helpful for explaining both the mechanisms of action of these psychoactive agents and the tolerance/dependence that might resul...
journal_title:Neurochemistry international
pub_type: 杂志文章
doi:10.1016/0197-0186(83)90062-1
更新日期:1983-01-01 00:00:00