Abstract：
:The three essential amino acids, valine, leucine and isoleucine, constitute the group of branched-chain amino acids (BCAAs). BCAAs are rapidly taken up into the brain parenchyma, where they serve several distinct functions including that as fuel material in brain energy metabolism. As one function of astrocytes is considered the production of fuel molecules that support the energy metabolism of adjacent neural cells in brain. Astroglia-rich primary cultures (APC) were shown to rapidly dispose of the BCAAs, including valine, contained in the culture medium. While the metabolisms of leucine and isoleucine by APC have already been studied in detail, some aspects of valine metabolism remained to be determined. Therefore, in the present study an NMR analysis was performed to identify the (13)C-labelled metabolites that are generated by APC during catabolism of [U-(13)C]valine and that are subsequently released into the incubation medium. The results presented show that APC (1) are potently disposing of the valine contained in the incubation medium; (2) are capable of degrading valine to the tricarboxylic acid (TCA) cycle member succinyl-CoA; and (3) release into the extracellular milieu valine catabolites and compounds generated from them such as [U-(13)C]2-oxoisovalerate, [U-(13)C]3-hydroxyisobutyrate, [U-(13)C]2-methylmalonate, [U-(13)C]isobutyrate, and [U-(13)C]propionate as well as several TCA cycle-dependent metabolites including lactate.
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Murín R,Mohammadi G,Leibfritz D,Hamprecht Bdoi
10.1007/s11064-008-9895-2subject
Has Abstractpub_date
2009-07-01 00:00:00pages
1195-203issue
7eissn
0364-3190issn
1573-6903journal_volume
34pub_type
杂志文章abstract：:Chlorpyrifos (CPF), an organophosphorus insecticide is known to cause ill health in non-target animals by inducing oxidative stress. In this study influence of cold stress (15°C and 20°C) and age as modulating factors on CPF induced oxidative stress was addressed to assess age-related differences and vulnerability in ...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-010-0311-3
更新日期：2011-02-01 00:00:00
abstract：:Mouse isolated vas deferens preincubated with [3-H]noradrenaline was superfused and the effect of alpha 1-adrenoceptor agonists was studied on the release of total radioactivity ([3H]noradrenaline + 3H-metabolites) and [3H]noradrenaline. Reverse phase high pressure liquid chromatography (HPLC) combined with scintillat...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00965167
更新日期：1986-01-01 00:00:00
abstract：:Cognitive impairment in diabetes (CID) is a severe chronic complication of diabetes mellitus (DM). It has been hypothesized that diabetes can lead to cognitive dysfunction due to expression changes of excitatory neurotransmission mediated by N-methyl-D-aspartate receptors (NMDAR) and α-amino-3-hydroxy-5-methyl-4-isoxa...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-019-02733-4
更新日期：2019-04-01 00:00:00
abstract：:Synaptosomes isolated from mouse brain were incubated with [14C]glutamate and [3H]gamma-amino-butyric acid ([3H]GABA), and then [14C]GABA (newly synthesized GABA) and [3H]GABA (newly captured GABA) in the synaptosomes were analysed. (1) the [3H]GABA was rapidly degraded in the synaptosomes, (2) when the synaptosomes w...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00968675
更新日期：1990-03-01 00:00:00
abstract：:Metabolic modeling of dynamic (13)C labeling curves during infusion of (13)C-labeled substrates allows quantitative measurements of metabolic rates in vivo. However metabolic modeling studies performed in the brain to date have only modeled time courses of total isotopic enrichment at individual carbon positions (posi...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-012-0782-5
更新日期：2012-11-01 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：: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：:We examined the role of hippocampal metabotropic glutamate receptor 5 (mGlu5) in spatial learning and memory. Although it has been shown that mGlu5 signalling is required for certain forms of learning and memory, its role in spatial learning is unclear since studies using pharmacological or knockout mice models provid...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-015-1595-0
更新日期：2015-06-01 00:00:00
abstract：:A number of axonal proteins display changes in phosphorylation during goldfish optic nerve regeneration (Larrivee and Grafstein, 1989). (1) To determine whether the phosphorylation of these proteins was closely linked to their synthesis in the retinal ganglion cell body, cycloheximide was injected intraocularly into g...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00965906
更新日期：1990-09-01 00:00:00
abstract：:Recently we have demonstrated that extracellular ATP acts as an excitatory neurotransmitter and enhances cell death in the presence of ferrous ions. By using a newly developed cis-parinaric acid fluorescence technique, we demonstrated that ATP, in a dose dependent manner, enhanced the increased membrane lipid peroxida...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF02527668
更新日期：1996-01-01 00:00:00
abstract：:Ursolic acid (UA) is a plant derived compound which is also a component of the standard human diet. It possesses a wide range of pharmacological properties, i.e., antioxidant, anti-inflammatory, antimicrobial and antitumor, which have been used in folk medicine for centuries. Moreover, influence of UA on central nervo...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-018-2505-z
更新日期：2018-05-01 00:00:00
abstract：:A phosphoinositide-linked peptide response in cultured rat astrocytes was studied by measuring the accumulation of [3H]inositol phosphates in the presence of lithium. Cultures derived from cortex, cerebellum and spinal cord each showed a unique pattern or degree of stimulation to a panel of neuropeptides. Cortical and...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00972490
更新日期：1988-04-01 00:00:00
abstract：:Poly(A)-RNA prepared from the brains of 30-day-old male rats has been shown to direct the synthesis of neuron-specific enolase (NSE) in a cell-free system derived from rabbit reticulocytes. The newly synthesized polypeptides were immunoprecipitated and analyzed on SDS-polyacrylamide slab gels. Autoradiography indicate...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00964225
更新日期：1980-04-01 00:00:00
abstract：:Serotonin uptake and metabolism was studied in ependymal primary cultures. Serotonin uptake was facilitated by two different systems, one of which was the neuronal serotonin transporter SERT, exhibiting a Vmax value of 3.8+/-0.1 pmol x min(-1) x (mg protein)(-1) and an apparent Michaelis-Menten constant of 0.41+/-0.03...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1023/b:nere.0000035810.08543.97
更新日期：2004-09-01 00:00:00
abstract：:We have adopted the PC12 cell line as in vitro cell model for studying Dp71 function in neuronal cells. These cells express a cytoplasmic (Dp71f) and a nuclear (Dp71d) isoform of Dp71 as well as various dystrophin-associated proteins (DAPs). In this study, we revealed by confocal microscopy analysis and Western blotti...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-009-0064-z
更新日期：2010-03-01 00:00:00
abstract：:The central control of growth hormone (GH) secretion from the pituitary gland is ultimately achieved by the interaction between two hypothalamic neurohormones, somatostatin which inhibits and growth hormone-releasing hormone (GHRH) which stimulates GH release. The regulation of the somatostatin and GHRH release from t...
journal_title：Neurochemical research
pub_type： 杂志文章,评审
doi：10.1007/s11064-005-9017-3
更新日期：2006-02-01 00:00:00
abstract：:Repeated electroconvulsive shock is an effective treatment for affective disorders. Striatum, hippocampus and brainstem are involved in affective disorders. Sodium-potassium/ATPase is of paramount importance for the proper functioning of the brain and its involvement in the affective disorders has been claimed for a l...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-006-9046-6
更新日期：2006-04-01 00:00:00
abstract：:Hippocampal cells dissociated from 5-day-old rat pups were grown in a suitable chemically defined basal medium, supplemented or not with 3,3',5-triiodo-L-thyronine (T3), [Arg8]-vasopressin (AVP), or both, at different concentrations. Four days after plating, neuron-like cells began to degenerate drastically in the bas...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00965924
更新日期：1989-10-01 00:00:00
abstract：:With the aid of histochemical and electrophoretic techniques activities for esterase and esterprotease were investigated in the digastric and masseter muscles from normal and dystrophic mice. The substrates used were alpha-naphthyl acetate and N-acetyl-L-alanine alpha-naphthyl ester. According to the microscopic obser...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00971312
更新日期：1989-03-01 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 Wistar-Kyoto (WKY) rat strain has been described as an animal model of depressive behavior that consumes significantly greater amounts of alcohol compared to the Wistar (WIS) rat strain. Since the mesolimbic dopamine (DA) type-2 (D2) receptors mediate reward-related behaviors, the present study measured the bindin...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-010-0233-0
更新日期：2010-11-01 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：:Altered proteostasis induced by amyloid peptide aggregation and hyperphosphorylation of tau protein, is a prominent feature of Alzheimer's disease, which highlights the occurrence of endoplasmic reticulum stress and triggers the activation of the unfolded protein response (UPR), a signaling pathway that enforces adapt...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-018-2469-z
更新日期：2018-03-01 00:00:00
abstract：:Nitric oxide (NO) regulates numerous physiological process and is the main source of reactive nitrogen species (RNS). NO promotes cell survival, but it also induces apoptotic death having been involved in the pathogenesis of several neurodegenerative diseases. NO and superoxide anion react to form peroxynitrite, which...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-015-1805-9
更新日期：2016-02-01 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：:Systemic inflammation is present in obesity and emerging evidence, primarily from studies using male rodents fed high-fat diets, suggests neuroimmune signaling also is involved. We investigated early changes in neuroimmune signaling during the weight gain that follows ovariectomy in rats. Ovariectomized (OVX) rats wer...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-018-2596-6
更新日期：2018-09-01 00:00:00
abstract：:In membranes of rat striatum, phorbol 12-myristate 13-acetate (PMA), a potent activator of Ca2+/phospholipid-dependent protein kinase, enhanced adenylate cyclase activity by counteracting the inhibition elicited by GTP. Exposure to pertussis toxin caused a similar alteration of the GTP-regulation of the enzyme activit...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF01101712
更新日期：1990-11-01 00:00:00
abstract：:The human formyl peptide receptor like 1 (FPRL-1) is a variant of the Gi-coupled formyl-peptide receptor. Functional FPRL-1 is endogenously expressed in the U87 astrocytoma cell line and there is accumulating evidence to suggest that FPRL-1 may be involved in neuroinflammation associated with the pathogenesis of Alzhe...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-007-9425-7
更新日期：2008-01-01 00:00:00
abstract：:Exposure to Hg2+ below 10 micrometer destroys synaptosomal membrane-associated sialidase of bovine brain in situ. Inhibition by Cu2+ occurs only at relatively higher concentrations, and is demonstrable after the synaptosomal membrane preparation has been presaturated with Cu2+ . Pb2+ does not inhibit enzymatic activit...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/BF00964363
更新日期：1978-02-01 00:00:00
abstract：:Chronic administration to rats of mood-stabilizers that are effective against mania in bipolar disorder, is reported to downregulate markers of the brain arachidonic acid cascade. We hypothesized that chronic administration of lamotrigine, which is used to treat depression and rapid cycling in bipolar disorder, might ...
journal_title：Neurochemical research
pub_type： 杂志文章
doi：10.1007/s11064-007-9526-3
更新日期：2008-05-01 00:00:00
