Abstract:
:The effect of maternal hypoxia on the modification of the fetal brain cell membrane N-methyl-D-aspartate (NMDA) receptor and its modulatory sites was investigated. Experiments were conducted in pregnant guinea pigs of 60 days of gestation. Guinea pig fetuses were exposed to maternal hypoxia (FiO2 = 7%) for 60 minutes. Tissue hypoxia in the fetal brain was documented biochemically by decreased levels of ATP and phosphocreatine (91.3% and 88.6% lower than normoxia, respectively). MK-801 binding characteristics (Bmax = number of receptors, Kd = affinity of receptor) were used as an index of NMDA receptor modification. P2 membrane fraction was prepared from the cortex of normoxic and hypoxic fetal brain and washed thoroughly before carrying out the binding assay. In hypoxic brains, Bmax decreased from the normoxic control level 0.79 +/- 0.03 pmol/mg protein to 0.58 +/- 0.03 pmol/mg protein (P < 0.005) and Kd value decreased (increased affinity) from 8.54 +/- 0.27 nM to 4.01 +/- 0.23 nM (P < 0.005) respectively. The MK-801 binding in the absence of added glutamate and glycine in hypoxic brain was 100% higher as compared to controls, indicating an increased sensitivity of the NMDA receptor to activation. The spermine dependent maximum activation of the NMDA receptor increased to 44% in the hypoxic animals as compared to 25% in controls. The Mg2+ response of the NMDA receptor was not affected by hypoxia.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Mishra OP,Delivoria-Papadopoulos Mdoi
10.1007/BF00968402keywords:
subject
Has Abstractpub_date
1992-12-01 00:00:00pages
1211-6issue
12eissn
0364-3190issn
1573-6903journal_volume
17pub_type
杂志文章abstract::Berberine and palmatine exhibit a mild and competitive inhibition on bovine adrenal tyrosine hydroxylase (EC 1.14.16.2; TH). In this study, the inhibitory effects of protoberberine alkaloids (such as berberine, palmatine and coptisine) on dopamine biosynthesis in PC12 cells were investigated. Treatment with berberine ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1007541020736
更新日期:2000-03-01 00:00:00
abstract::Chemokines are small secreted proteins that are essential for the recruitment and activation of specific leukocyte subsets at sites of inflammation and for the development and homeostasis of lymphoid and nonlymphoid tissues. During the past decade, chemokines and their receptors have also emerged as key signaling mole...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1023/b:nere.0000021246.96864.89
更新日期:2004-05-01 00:00:00
abstract::Docosahexaenoic acid (DHA) is verified to have neuroprotective effects on traumatic brain injury (TBI) rats by activating Nrf2 signaling pathway, but the role of NOX2 in this effect has not been illuminated. So this study explored the role of NOX2 in TBI models treated with DHA, aiming to complete the mechanism of DHA...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-020-03078-z
更新日期:2020-08-01 00:00:00
abstract::Due to the biological importance of sodium and its relative scarcity within many natural environments, 'salt appetite' has evolved whereby dietary salt is highly sought after and palatable when tasted. In addition to peripheral responses, salt depletion is detected within the brain via circumventricular organs and 11β...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1007/s11064-017-2336-3
更新日期:2018-01-01 00:00:00
abstract::3-Nitropropionic acid (3-NP)-induced neurotoxicity can be used as a model for the genetic neurodegenerative disorder Huntington's disease (HD). A metabolic profiling strategy was adopted to explore the biochemical consequences of 3-NP administered to rats in specific brain regions. (1)H NMR spectroscopy was used to ch...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-008-9904-5
更新日期:2009-07-01 00:00:00
abstract::The features of neuronal damage induced by the mitochondrial toxin NaN(3) were investigated in rat primary cortical neuron cultures. Cell viability (MTT colorimetric determination) and transmembrane mitochondrial potential (J-C1 fluorescence) were concentration-dependently reduced 24 h after NaN(3); neither nuclear fr...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-008-9852-0
更新日期:2009-05-01 00:00:00
abstract::Fecal incontinence and constipation still remain the major complications after procedures for anorectal malformations (ARMs). Previous studies have demonstrated a decrease of neural cell in lumbosacral spinal cord of ARMs patients and rat models. However, the underlying mechanism remains elusive. In this study, the ne...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-017-2354-1
更新日期:2017-11-01 00:00:00
abstract::The Editors have retracted this article [1] following an investigation conducted by the journal. After publication concerns were raised regarding interpretation of the data presented in Fig. 4. The Editors requested additional data and clarification to confirm interpretation of data results. After further review, the ...
journal_title:Neurochemical research
pub_type: 杂志文章,撤回出版物
doi:10.1007/s11064-020-03077-0
更新日期:2020-09-01 00:00:00
abstract::To assess the therapeutic effects of microRNA-21 (miR-21) knockdown (KD) for acute thoracic spinal cord contusion using a mouse model. Forty C57/BL6 mice were randomly divided into four groups: mice in the sham-operated (Sham) group received surgical procedure without spinal cord contusion; the spinal cord injury (SCI...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-018-2580-1
更新日期:2018-08-01 00:00:00
abstract::Disturbance in cholesterol homeostasis appears to be an important factor in the pathogenesis of neurodegenerative disorders. The aim of the present study was to investigate sterol regulatory element binding protein (SREBP) levels in the nuclear extracts of human neuroblastoma cells and the possible interaction of beta...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-008-9832-4
更新日期:2009-05-01 00:00:00
abstract::Cortical spreading depression (CSD) enhances ischemic tolerance to temporary focal ischemia. Although this effect most likely requires the expression or activation of neuroprotective factors, their identity remains relatively unknown. One important factor involved in neuroprotection is adenosine monophosphate-dependen...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-014-1447-3
更新日期:2014-12-01 00:00:00
abstract::The labeling of RNA in young and adult rat brain has been studied by measuring in vitro (tissue slices incubation) the incorporation of labeled uridine into RNA of total tissue and of the various subcellular fractions purified from cerebral hemispheres of 1- and 10-month-old rats. Gel electrophoretic analysis of the n...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965100
更新日期:1983-04-01 00:00:00
abstract::Exposure chronically to n-hexane produces peripheral-central axonopathy mediated by 2,5-hexanedione (HD). Previous studies have demonstrated decreases in neurofilament (NF) contents of peripheral and central nervous regions from rats intoxicated with HD, and recent analysis has demonstrated that axonal atrophy, instea...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-004-2439-5
更新日期:2005-02-01 00:00:00
abstract::The wobbler mouse suffers an autosomal recessive mutation producing severe neurodegeneration and astrogliosis in spinal cord. It has been considered a model for amyotrophic lateral sclerosis. We have studied in these animals the expression of two proteins, the growth-associated protein (GAP-43) and the NADPH-diaphoras...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1020918310281
更新日期:1999-01-01 00:00:00
abstract::Biotinylated derivatives of tetanus toxin were prepared and isolated by chromatofocusing and ganglioside-affinity chromatography. Biotinylation was monitored by the appearance of a 210,00 dalton complex upon SDS-polyacrylamide gel electrophoresis in the presence of avidin, and by selective binding to an avidin-Sepharo...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00969922
更新日期:1990-04-01 00:00:00
abstract::Focal epileptic seizures can in some patients be managed by inhibiting γ-aminobutyric acid (GABA) uptake via the GABA transporter 1 (GAT1) using tiagabine (Gabitril®). Synergistic anti-seizure effects achieved by inhibition of both GAT1 and the betaine/GABA transporter (BGT1) by tiagabine and EF1502, compared to tiaga...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-020-03017-y
更新日期:2020-07-01 00:00:00
abstract::There is ample evidence stating Polychlorinated biphenyls (PCBs) as neurotoxins. In the current study, we have analyzed the behavioural impact of PCBs exposure in adult rats and assessed the simultaneous effect of antioxidant melatonin against the PCBs action. The rats were grouped into four and treated intraperitonea...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-016-2087-6
更新日期:2017-02-01 00:00:00
abstract::We have previously shown that 5-methyltetrahydrofolate influences neuro-secretion. The present study more precisely characterises the processes involved and considers one probable site of action. Focusing on the tyrosine-noradrenalin axis in cerebellum we showed 5-methyltetrahydrofolate causes a significant reduction ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF01705542
更新日期:1995-06-01 00:00:00
abstract::The endogenous opioid peptide dynorphin A elicits non-opioid receptor-mediated neurotoxic effects. These effects are blocked by pretreatment with N-methyl-D-aspartate (NMDA) receptor antagonists. Herein, the mechanism for the non-opioid effects of dynorphin and related peptides was studied by matrix-assisted laser des...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1010903215566
更新日期:2001-04-01 00:00:00
abstract::Using the immunoblot technique, we found that an incubation of purified human myelin in 10 mM Tris-HCl buffer at pH 7.5 resulted in the conversion of the myelin-associated glycoprotein (MAG) to a smaller derivative (dMAG). Exogenously added 5 mM CaCl2 accelerated the conversion of MAG. In buffer containing more than 1...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00964509
更新日期:1984-05-01 00:00:00
abstract::Amphiphile dependency, solubility in aqueous solutions, and sensitivity to proteolysis of acetylcholinesterase (AChE) and nonspecific cholinesterase (nsChE) in the rat superior cervical ganglion were studied and compared to properties of soluble plasma cholinesterases. Ganglion AChE shows strong amphiphile dependency:...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00964537
更新日期:1985-06-01 00:00:00
abstract::A Zn(2+)-glycerophosphocholine cholinephosphodiesterase was purified with a specific activity of 4.6 mumole/min.mg protein from bovine brain membranes by procedures involving PI-PLC solubilization, concanavalin A affinity chromatography, CM-sephadex chromatography and Sephadex G-150 chromatography. Based on molecular ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF02532395
更新日期:1996-10-01 00:00:00
abstract::The influence of hypothyroidism (HO) induced by treatment with propylthiouracil on lipid composition, receptor responsiveness of M1-muscarinic receptors (M1AChRs) and metabotropic glutamate receptors (mGluRs) as well as on protein kinase C (PKC) activity was investigated in the cerebral cortex of Lewis rats. HO did no...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF02527750
更新日期:1996-05-01 00:00:00
abstract::Kainic acid-induced seizures produced early (2 hr) generalized edema and later (24 and 48 hr) necrotic edema in temporal cortex and hippocampus as measured by specific gravity changes. Mannitol given during the seizure partially protected against the early edema and prevented the necrotic edema indicating early edema ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF01000241
更新日期:1987-06-01 00:00:00
abstract::The effect of the calcium channel blocker (KB-2796) on metabolic and functional recovery in rabbit spinal cord after 20, 30, and 40 min ischemia and 4 days of recovery was investigated. The drug was given intraperitoneally in three different doses, 10, 20, or 50 mg/kg pre- or post-ischemia of 20, 30, or 40 min duratio...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00968997
更新日期:1994-12-01 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::Comparative structure-function studies have been carried out for alpha-conotoxin GI acting on nicotinic acetylcholine receptors (AChR) from mammalian muscles and from the electric organ of the Torpedo californica ray and for alpha-conotoxin ImI, which targets the neuronal alpha7 AChR. A series of analogs has been prep...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1022889827195
更新日期:2003-04-01 00:00:00
abstract::Ellagic acid (EA, 2,3,7,8-tetrahydroxy-chromeno; C14H6O8) is a polyphenol derived from fruits (pomegranates, berries) and nuts. EA exhibits antioxidant capacity and induces anti-inflammatory actions in several mammalian tissues. EA has been characterized as a possible neuroprotective agent, but the number of reports i...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1007/s11064-016-1853-9
更新日期:2016-06-01 00:00:00
abstract::The oxidation of pyruvate is mediated by the pyruvate dehydrogenase complex (PDHC; EC 1.2.4.1, EC 2.3.1.12 and EC 1.6.4.3) whose catalytic activity is influenced by phosphorylation and by product inhibition. 2-Oxoglutarate and 3-hydroxybutyrate are readily utilized by brain mitochondria and inhibit pyruvate oxidation....
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00970527
更新日期:1987-08-01 00:00:00
abstract::Diurnal changes in Chordc1 mRNA were recently described in mouse hypothalamus. This report shows that Chordc1 mRNA changes rhythmically throughout the entire adult brain with highest expression levels occurring around the dark-light transition. The rhythmic cycling pattern of Chordc1 was retained under various light-d...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-006-9271-z
更新日期:2007-02-01 00:00:00