Abstract：
:In the present study, we aimed to investigate the effects of pinealectomy and chronic melatonin administration on focal epileptiform activity induced by penicillin in the rat cortex and to determine the relation between melatonin levels and electrocorticogram (ECoG) power spectrum. For this purpose, male Sprague-Dawley rats were divided into six groups: control, sham operated, ethanol, melatonin, pinealectomy and pinealectomy + melatonin group. Melatonin-treated rats was intraperitoneally injected with a daily single dose of 10 mg/kg melatonin for 14 days, but the last dose was given 30 min after local application of penicillin as a convulsant agent. Focal epileptiform activity was produced by intracortical administration of penicillin (200 units/1 μl). While chronic melatonin application did not affect either the onset latency or the spike frequency of epileptiform activity, pinealectomy significantly reduced latency to onset of initial epileptiform discharges and increased cortical epileptiform activity. However, acute melatonin administration decreased the epileptiform activity. The results also indicated that exogenously applied melatonin did not change the spectral analysis of ECoG, but pinealectomy led to a reduction in the power of the fast bands (gamma) power in ECoG. We conclude that endogenous melatonin signaling seem to have a tonic inhibitory action on neuronal excitability and epileptiform activity, and also a certain concentration of melatonin required for normal cortical excitability.
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Yildirim M,Aydin-Abidin S,Abidin I,Akca M,Canpolat S,Cansu Adoi
10.1007/s11064-013-1069-1subject
Has Abstractpub_date
2013-08-01 00:00:00pages
1672-85issue
8eissn
0364-3190issn
1573-6903journal_volume
38pub_type
杂志文章abstract：:It was found that acute ethanol intoxication caused an imbalance of the neurotransmitters in the CNS: accumulation of GABA and serotonin and depletion of catecholamines. Alcohol depression was characterized by suppression of the evoked potentials of the various rat brain structures. Under chronic ethanol intoxication ...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00966062
更新日期：1982-11-01 00:00:00
abstract：:The effect of castration on the levels of brain monoamines and their metabolites has been investigated in rats which became or did not become muricidal following long-term isolation. Fourteen brain areas were explored: olfactory bulbs (OB), olfactory tubercles (OT), septum (Se), striatum (Sr), amygdala (A), thalamus (...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00967251
更新日期：1993-04-01 00:00:00
abstract：:The present study addressed the hypothesis that the DA transporter ligand, [3H]mazindol, labels multiple sites/states associated with the dopamine (DA) transporter in striatal membranes. Incubations with [3H]mazindol proceeded for 18-24 hr at 4 degrees C in 55.2 mM sodium phosphate buffer, pH 7.4, with a protease inhi...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00966817
更新日期：1994-02-01 00:00:00
abstract：:Ecto-nucleotidases play a pivotal role in terminating the signalling via ATP and in producing adenosine, a neuromodulator in the nervous system. We have now investigated the pattern of adenosine formation with different concentrations of extracellular ATP in rat hippocampal nerve terminals. It was found that adenosine...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1023/a:1012392719601
更新日期：2001-09-01 00:00:00
abstract：:The presence and specificity of insulin receptors was investigated in culture cells obtained from 15-16 days old embryonic mouse cerebra. Developmental studies suggested that the maximum insulin binding occurred at about 11 days in vitro (DIV). Scatchard analysis of binding data revealed two types of binding sites. On...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF01268877
更新日期：1988-05-01 00:00:00
abstract：:We have previously reported that angiotensin receptor blockade reduces reperfusion hemorrhage in a suture occlusion model of stroke, despite increasing matrix metalloproteinase (MMP-9) activity. We hypothesized that candesartan will also decrease hemorrhage associated with delayed (6 h) tissue plasminogen activator (t...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-013-1185-y
更新日期：2013-12-01 00:00:00
abstract：:Parecoxib is a recently described novel COX-2 inhibitor whose functional significance and neuroprotective mechanisms remain elusive. Therefore, in this study, we aimed to investigate whether delayed administration of parecoxib inhibited mitochondria-mediated neuronal apoptosis induced by ischemic reperfusion injury vi...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-011-0615-y
更新日期：2012-02-01 00:00:00
abstract：:In this review we examine successively: 1) the major effects of thyroid hormone deficiency seen during brain development with special emphasis on the changes in neuronal morphology and migration occurring postnatally in the cerebellum. 2) The effects of this hormone on microtubule assembly during neurite outgrowth and...
journal_title：Neurochemical research
pub_type： 杂志文章,评审
doi：10.1007/BF00965840
更新日期：1991-09-01 00:00:00
abstract：:Previous studies have shown that early life stress induced by maternal separation or non-handling can lead to behavioural deficits in rats and that these deficits can be alleviated by providing palatable cafeteria high-fat diet (HFD). In these studies we investigated the effects of maternal separation or non-handling ...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-013-0985-4
更新日期：2013-04-01 00:00:00
abstract：:Recent studies have demonstrated a scrutinized association of diabetes mellitus with depressive symptoms and major depression. Glycogen synthase kinase-3 (GSK-3) is a protein kinase enzyme constitutively active in non-stimulated cells and in multiple signalings. Independent lines of research provide a converging evide...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-015-1670-6
更新日期：2015-09-01 00:00:00
abstract：:Recent studies provide solid evidence for the importance to delineate the co-relationship between preconditioning stimuli and therapeutic efficacy of drugs commonly used in clinic. However, very little is known about this important topic. In the present study, we investigated the effects of hyperthermia on the protect...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-010-0327-8
更新日期：2011-02-01 00:00:00
abstract：:The p53 tumor suppressor gene is a sequence-specific transcription factor that activates the expression of genes engaged in promoting growth arrest or cell death in response to multiple forms of cellular stress. p53 expression is elevated in damaged neurons in acute models of injury such as ischemia and epilepsy and i...
journal_title：Neurochemical research
pub_type： 杂志文章,评审
doi：10.1023/a:1021687810103
更新日期：2003-01-01 00:00:00
abstract：:The subcellular distribution of Ca2+/calmodulin-stimulated adenylate cyclase activity was studied in comparison with that of guanine nucleotide-stimulated cyclase activity. The distributions of these activities were similar among the crude fractions but differed among the purified subsynaptosomal fractions. The specif...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00965018
更新日期：1986-03-01 00:00:00
abstract：:The vesicular hypothesis has stimulated fruitful investigations on many secreting systems. In the case of rapid synaptic transmission, however, the hypothesis has been found difficult to reconcile with a number of well established observations. Brief impulses of transmitter molecules (quanta) are emitted from nerve te...
journal_title：Neurochemical research
pub_type： 杂志文章,评审
doi：10.1023/a:1022451224748
更新日期：1998-05-01 00:00:00
abstract：:Previous work from this laboratory and others has shown that neurotransmitters can activate phospholipase D. Unlike the phospholipase C that specifically hydrolyzes inositol-containing phospholipids, phospholipase D in neuronal tissue specifically hydrolyzes phosphatidylcholine. One route for the synthesis of phosphat...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1023/a:1020716304520
更新日期：1998-08-01 00:00:00
abstract：:The antibodies against omega-conotoxin GVIA (omega-CTX GVIA; N-type voltage-dependent calcium channel [VDCC] blocker) and B1Nt (N-terminal segment [residues 1-13] of BI alpha1 subunits of VDCCs) were prepared, and the selectivity for each antigen omega-CTX GVIA and B1Nt was investigated. For the antigen selectivity of...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1023/a:1023208103438
更新日期：2003-06-01 00:00:00
abstract：:The most important therapeutic effect of cholinesterase inhibitors (ChEI) on approximately 50% of Alzheimer's disease (AD) patients is to stabilize cognitive function at a steady level during a 1-year period of treatment as compared to placebo. Recent studies show that in a certain percentage (approximately 20%) of pa...
journal_title：Neurochemical research
pub_type： 杂志文章,评审
doi：10.1023/a:1022869222652
更新日期：2003-04-01 00:00:00
abstract：:Taurine is a semiessential amino acid that is not incorporated into proteins. In mammalian tissues, taurine is ubiquitous and is the most abundant free amino acid in the heart, retina, skeletal muscle, and leukocytes. Taurine reaches up to 50 mM concentration in leukocytes. Taurine has been shown to be tissue-protecti...
journal_title：Neurochemical research
pub_type： 杂志文章,评审
doi：10.1023/b:nere.0000010440.37629.17
更新日期：2004-01-01 00:00:00
abstract：:Turnover rate of individual molecular species of sphingomyelin of adult rat brain myelin and microsomal membranes was determined after an intracerebral injection of 100 microCi of [C3H3]choline. Myelin and microsomal membrane sphingomyelins were isolated from the rest of the lipids. The individual molecular species of...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00964414
更新日期：1981-10-01 00:00:00
abstract：:In this review properties of lipid acetyltransferase enzymes are outlined. The three activities of interest are lyso PAF acetyltransferase (acetyl CoA: 1-alkyl-sn-glycero-3-phosphocholine acetyltransferase), AGP acetyltransferase (acetyl CoA: 1-alkyl sn-glycero-3-phosphate acetyltransferase) and a transacetylase activ...
journal_title：Neurochemical research
pub_type： 杂志文章,评审
doi：10.1023/a:1007567205078
更新日期：2000-05-01 00:00:00
abstract：:Metabolism of triacylglycerol (TAG) in developing brain has been examined. TAG is a relatively minor fraction of brain lipid in both suckling and adult rats and cannot be accounted for as entrapped blood. When glycerol tri[1-14C]oleate and [2-3H]glycerol trioleate were simultaneously injected intracerebrally into suck...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00966679
更新日期：1981-11-01 00:00:00
abstract：:N-methyl-D-aspartate (NMDA) inhibits carbachol-stimulated phosphoinositide breakdown in rat brain cortical slices but not in isolated membranes (1). To gain insight into the mechanisms, we examined the effects of NMDA on carbachol-stimulated [3H]inositol phosphate and intermediates of phosphatidylinositol cycle accumu...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1023/a:1022426204583
更新日期：1997-05-01 00:00:00
abstract：:One pathway by which tryptophan is metabolized in the brain as well as in the periphery is through cleavage of the indole ring to formylkynurenine and then kynurenine. Indoleamine-2,3-dioxygenase, the enzyme that catalyzes this cleavage, and kynurenine are distributed all across the different anatomic regions of brain...
journal_title：Neurochemical research
pub_type： 杂志文章,评审
doi：10.1007/BF00964611
更新日期：1980-03-01 00:00:00
abstract：:The binding of [3H]ethylketocyclazocine ([3H]EKC) under the suppression of mu and delta sites in the brain of EL mice (seizure-susceptible) was examined to determine the relationship between seizures and the dynorphinergic system. The density of kappa-opioid receptors in the cerebrum of adult EL mice during interictal...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1023/a:1022424707543
更新日期：1998-02-01 00:00:00
abstract：:The effects of graded doses of D-pipecolic acid (0.005-5 micrograms/animals s.c.) on tolerance to the hypothermic effect of ethanol (4 g/kg i.p.) were investigated in mice. D-Pipecolic acid itself did not change the core temperature or the acute hypothermic response to a single dose of ethanol. Repeated D-pipecolic ac...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00967746
更新日期：1986-12-01 00:00:00
abstract：:Methylphenidate is commonly used for the treatment of attention deficit/hyperactivity disorder. There are still few works regarding the effects of methylphenidate on brain energy metabolism. Thus, in the present study we evaluated the effect of chronic administration of methylphenidate on the activities of mitochondri...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-010-0229-9
更新日期：2010-11-01 00:00:00
abstract：:The real-time iontophoretic method has measured volume fraction and tortuosity of the interstitial component of extracellular space in many regions and under different conditions. To interpret these data computer models of the interstitial space (ISS) of the brain are constructed by representing cells as Basic Cellula...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-019-02793-6
更新日期：2020-01-01 00:00:00
abstract：:Cathepsin B (EC 3.4.22.1) was purified 746-fold with a 21% recovery from bovine brain by autolysis, fractional precipitation with acetone, carboxy-methyl-Sephadex chromatography, affinity chromatography on a cystamine containing column and gel filtration chromatography. The purified cathepsin B eluted on gel filtratio...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00965209
更新日期：1986-06-01 00:00:00
abstract：:Bovine brain synaptic membranes which were frozen and then extensively washed showed low affinity [3H]muscimol binding. These membranes contained GABA and calmodulin, apparently tightly bound within the membrane fraction. Membranes which were additionally treated with the detergent Triton X-100 showed high affinity [3...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00970756
更新日期：1988-09-01 00:00:00
abstract：:The neurotoxic effects of aluminum are generally associated with reduced antioxidant capacity, increased oxidative stress and apoptosis, which lead to the induction of neurodegenerative processes. Curcumin has a lipophilic polyphenol character and effects of antioxidant and anti-apoptotic. The present study was undert...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-019-02839-9
更新日期：2019-08-01 00:00:00
