Abstract:
:To further analyze the action of copper on brain synaptic mechanisms, the brain dipeptide carnosine (beta-alanyl-L-histidine) was tested in Xenopus laevis oocytes expressing the rat P2X4 or P2X7 receptors. Ten micromolar copper halved the currents evoked by ATP in both receptors; co-application of carnosine plus copper prevented the metal induced-inhibition with a median effective concentration of 12.1 +/- 3.9 and 12.0 +/- 5.5 microm for P2X4 and P2X7, respectively. Zinc potentiated only the P2X4 ATP-evoked currents; carnosine had no effect over this metal. The relative potency and selectivity of classical metal chelators to prevent the copper inhibition was compared between carnosine and penicillamine (PA), bathophenanthroline (BPh) or L-histidine (His). Their rank order of potency in P2X4 and P2X7 receptors was carnosine = PA = His > BPh > Glycine (Gly) and carnosine = BPh = His > PA > Gly, respectively. The potency to prevent the zinc-induced potentiation in the P2X4 receptor was BPh > PA > His; carnosine, Gly and beta-alanine were inactive. Whereas 1-100 microm carnosine or His alone did not modify the ATP-evoked currents, 10-100 microm PA augmented and 100 microm BPh decreased the ATP-evoked currents. Carnosine was able to revert the copper-induced inhibition restoring the maximal ATP gated current in a concentration-dependent manner. Electronic spectroscopy confirm the formation of carnosine-Cu(II) complexes, mechanism that can account for the prevention and reversal of the copper inhibition, revealing its potential in copper intoxication treatment.
journal_name
J Neurochemjournal_title
Journal of neurochemistryauthors
Coddou C,Villalobos C,González J,Acuña-Castillo C,Loeb B,Huidobro-Toro JPdoi
10.1046/j.0022-3042.2001.00732.xkeywords:
subject
Has Abstractpub_date
2002-02-01 00:00:00pages
626-33issue
4eissn
0022-3042issn
1471-4159pii
732journal_volume
80pub_type
杂志文章abstract::G-protein coupled receptors may mediate their effects on neuronal growth and differentiation through activation of extracellular signal-regulated kinases 1/2 (ERK1/2), often elicited by transactivation of growth factor receptor tyrosine kinases. This elaborate signaling process includes inducible formation and traffic...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2010.07030.x
更新日期:2011-03-01 00:00:00
abstract::The hydrolysis of phosphoinositides (PI) elicited in cerebellar granule cell cultures by agonists of metabolotropic glutamate receptors, glutmate and quisqualate, was enhanced when the cells were pretreated with concanavalin A (Con-A). A similar effect was produced by wheat germ agglutinin, but not by several other le...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1991.tb03474.x
更新日期:1991-06-01 00:00:00
abstract::PRMT1, a major arginine methyltransferase, plays critical roles in transcription, DNA damage response, and cell proliferation. Although we have previously discovered the crucial roles of PRMT1 for oligodendrocyte lineage progression in the central nervous system of neural stem cell-specific PRMT1 conditional knockout ...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/jnc.15149
更新日期:2020-08-16 00:00:00
abstract::Phosphoinositide hydrolysis was studied in neurohybrid NCB-20 cells prelabeled with myo-[3H]inositol. Among nearly 20 neurotransmitters and neuromodulators examined, only bradykinin, carbachol, and histamine significantly increased the accumulation of [3H]inositol monophosphate (IP1) in the presence of lithium. The EC...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1988.tb01067.x
更新日期:1988-08-01 00:00:00
abstract::Schwann cells provide a favorable microenvironment for successful regeneration of the injured peripheral nerve. Even though the roles of extracellular matrix proteins in the Schwann cell physiology have long been studied, the precise function of nidogen, a ubiquitous component of the basal lamina, in Schwann cells is ...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2007.04580.x
更新日期:2007-08-01 00:00:00
abstract::Calsenilin/DREAM/KChIP3 was identified as a calcium-binding protein that interacts with presenilins, serves as a transcription repressor, and binds to the A-type potassium channel. In this study, we hypothesized that calsenilin might be involved in the neurodegeneration of Alzheimer's disease and examined calsenilin e...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2004.02159.x
更新日期:2004-02-01 00:00:00
abstract::Binding of tetanus toxin to rat brain membranes was of lower affinity and capacity when binding was determined in 150 mM NaCl, 50 mM Tris-HCl (pH 7.4) than in 25 mM Tris-acetate (pH 6.0). Binding under both conditions was reduced by treating the membranes with neuraminidase. Pronase treatment, however, reduced toxin b...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1986.tb02852.x
更新日期:1986-07-01 00:00:00
abstract::Agmatine (decarboxylated arginine) was originally identified in the CNS as an imidazoline receptor ligand. Further studies demonstrated that agmatine antagonizes NMDA receptors and inhibits nitric oxide synthase. Intrathecally administered agmatine inhibits opioid tolerance and hyperalgesia evoked by inflammation, ner...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2007.04647.x
更新日期:2007-09-01 00:00:00
abstract::The human brain endothelial capillary cell line hCMEC/D3 has been developed recently as a model for the human blood-brain barrier. In this study a further characterization of this model was performed with special emphasis on permeability properties and active drug transport. Para- or transcellular permeabilities (P(e)...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2008.05730.x
更新日期:2008-12-01 00:00:00
abstract::The neurosteroid allopregnanolone, a reduced metabolite of progesterone, induces anxiolytic effects by enhancing GABA(A) receptor function. Neuropeptide Y (NPY) and GABA are thought to interact functionally in the amygdala, and this interaction may be important in the regulation of anxiety. By using Y(1)R/LacZ transge...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.2001.00559.x
更新日期:2001-10-01 00:00:00
abstract::The time course of changes in extracellular glutamic acid levels and their Ca2+ dependency were studied in the rat striatum during focal cerebral ischaemia, using microdialysis. Ischaemia-induced changes were compared with those produced by high K(+)-evoked local depolarization. To optimize time resolution, glutamate ...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1994.63031003.x
更新日期:1994-09-01 00:00:00
abstract::Tissue plasminogen activator (tPA) administration beyond 4.5 h of stroke symptoms is beneficial for patients but has an increased risk of cerebral hemorrhage. Thus, increasing the therapeutic window of tPA is important for stroke recovery. We previously showed that prothymosin alpha (ProTα) or its mimetic hexapeptide ...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/jnc.14858
更新日期:2020-06-01 00:00:00
abstract::The contents of cystathionine and taurine, as well as cystathionine beta-synthase activity in various regions of the brains of normal and DL-propargylglycine-treated rats, were measured. The content of cystathionine in each region of brain increased gradually from 0.5 mg to 20 mg/200 g body weight in relation to the d...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1985.tb08744.x
更新日期:1985-04-01 00:00:00
abstract::Neuromodulation is a fundamental process in the brain that regulates synaptic transmission, neuronal network activity and behavior. Emerging evidence demonstrates that astrocytes, a major population of glial cells in the brain, play previously unrecognized functions in neuronal modulation. Astrocytes can detect the le...
journal_title:Journal of neurochemistry
pub_type: 杂志文章,评审
doi:10.1111/j.1471-4159.2008.05830.x
更新日期:2009-02-01 00:00:00
abstract::Sex differences were investigated in cholinergic neurons of the septal-diagonal band region of adult rats subjected to neonatal treatment with 3,3',5-triiodo-L-thyronine (T3). Neonatal hyperthyroidism resulted in a 44% increase in specific activity of choline acetyltransferase (ChAT; EC 2.3.1.6) in adult male rat sept...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1991.tb02570.x
更新日期:1991-01-01 00:00:00
abstract::Excessive N-methyl-D-aspartate (NMDA) signaling is thought to contribute to bipolar disorder symptoms. Lithium and carbamazepine, effective against bipolar mania, are reported in rats to reduce brain transcription of an arachidonic acid selective calcium-dependent cytosolic phospholipase A(2) (cPLA(2)), as well as exp...
journal_title:Journal of neurochemistry
pub_type: 杂志文章,收录出版
doi:10.1111/j.1471-4159.2007.04648.x
更新日期:2007-09-01 00:00:00
abstract::Japanese encephalitis virus (JEV), a single-stranded RNA (ssRNA) virus, is the leading cause of encephalitis in Asia. Microglial activation is one of the key events in JEV-induced neuroinflammation. Although the various microRNAs (miRNAs) has been shown to regulate microglia activation during pathological conditions i...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/jnc.12609
更新日期:2014-04-01 00:00:00
abstract::The nuclear factor 1 (NF-1) motifs, NF-1 II/III, In the two 98-bp repeats of the transcription-regulatory region of JC virus (JCV), have a critical role in brain-specific transcription from the JCV early promoter-enhancer. In this study, the role of these motifs in transactivation of the JCV late promoter-enhancer (JC...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1996.67020473.x
更新日期:1996-08-01 00:00:00
abstract::The expression of inducible nitric oxide synthase (NOS2) in glial cells is inhibited by neurotransmitters such as norepinephrine (NE) which elevate cAMP levels. We examined the molecular basis for this effect using a 2.2-kb fragment of the rat NOS2 promoter transfected into rat C6 glioma cells. Promoter activation (up...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.2001.00375.x
更新日期:2001-07-01 00:00:00
abstract::Noradrenaline (NA) release and its modulation via presynaptic opioid receptors were studied in rabbit hippocampal slices, which were preincubated with [3H]NA, continuously superfused in the presence of 30 microM cocaine and stimulated electrically. The evoked release of [3H]NA was strongly reduced by the preferential ...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.1986.tb08499.x
更新日期:1986-06-01 00:00:00
abstract::The subunit compositions of the NR1 C2 exon-containing N-methyl-D-aspartate (NMDA) receptors of adult mammalian forebrain were determined by using a combination of immunoaffinity chromatography and immunoprecipitation studies with NMDA receptor subunit-specific antibodies. NMDA receptors were solubilised by sodium deo...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1997.69052138.x
更新日期:1997-11-01 00:00:00
abstract::Aquaporin-4, a predominant water channel in the brain, is specifically expressed in astrocyte endfeet and plays a central role in water homeostasis, neuronal activity, and cell migration in the brain. It has two dominant isoforms called M1 and M23, whose mRNA is driven by distinct promoters located upstream of exons 0...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2012.07652.x
更新日期:2012-03-01 00:00:00
abstract::Acetyl-L-carnitine (ALCAR) is an endogenous metabolic intermediate that facilitates the influx and efflux of acetyl groups across the mitochondrial inner membrane. Exogenously administered ALCAR has been used as a nutritional supplement and also as an experimental drug with reported neuroprotective properties and effe...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2010.06807.x
更新日期:2010-08-01 00:00:00
abstract::Glial cell line-derived neurotrophic factor (GDNF) provides neuroprotection, but its neuroprotective mechanism has not been resolved. We investigated the neuroprotective mechanism of GDNF using primary culture of the rat mesencephalon. Bleomycin sulfate (BLM) and L-buthionine-[S,R]-sulfoximine (BSO) caused apoptosis i...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.2000.741175.x
更新日期:2000-03-01 00:00:00
abstract::Brain-derived neurotrophic factor (BDNF) promotes the survival of various neuronal populations and thus shows potential in the treatment of neurodegenerative disease. However, BDNF is not pharmacokinetically optimal for use as a therapeutic agent. As a step toward the development of low-molecular-weight BDNF-like drug...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1998.70041712.x
更新日期:1998-04-01 00:00:00
abstract::Fascin-1 is a putative bundling factor of actin filaments in the filopodia of neuronal growth cones. Here, we examined the structure of the actin bundle formed by human fascin-1 (actin/fascin bundle), and its mode of interaction with myosin in vitro. The distance between cross-linked filaments in the actin/bundle was ...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.2003.02058.x
更新日期:2003-11-01 00:00:00
abstract::We have characterised the induction of the mitogen-inducible form of cyclooxygenase, COX-2, in the rat cerebral cortex in response to excitotoxin injection into the nucleus basalis. This model is associated with intense stimulation of the ascending pathway to the cerebral cortex, seizure activity, and subsequent ipsil...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.1996.66010006.x
更新日期:1996-01-01 00:00:00
abstract::Cyclooxygenases (COX)-1 and -2 are key enzymes required for the conversion of arachidonic acid to eicosanoids, potent mediators of inflammation. In patients with multiple sclerosis, COX-2 derived prostaglandins (PGs) are elevated in the CSF and COX-2 is up-regulated in demyelinating plaques. However, it is not known w...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2011.07363.x
更新日期:2012-05-01 00:00:00
abstract::We have investigated the molecular mechanisms of neurotrophin-mediated cell survival in HT22 cells, a murine cell line of hippocampal origin, expressing the brain-derived neurotrophic factor (BDNF) receptor TrkB as well as the TrkB.T1 splice variant. Stimulation with BDNF protected HT22-TrkB cells, but not HT22-TrkB.T...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1046/j.1471-4159.2003.02255.x
更新日期:2004-03-01 00:00:00
abstract::Members of the interleukin-1 (IL-1) family of cytokines are key mediators in the regulation of host defence responses and the development of inflammation in response to acute and chronic injury to the brain. Two major agonists, IL-1alpha and IL-1beta, bind to a membrane receptor complex composed of the type-1 IL-1 rec...
journal_title:Journal of neurochemistry
pub_type: 杂志文章
doi:10.1111/j.1471-4159.2005.03364.x
更新日期:2005-10-01 00:00:00