Abstract:
:We review some of the older literature concerning metabolic turnover of cholesterol in the nervous system. The overall picture is that incorporation of radioactive precursors into brain cholesterol is roughly proportional to the rate of myelination and that, once incorporated, radioactive cholesterol is relatively stable metabolically. We outline a strategy for demonstrating the source (local synthesis or uptake from circulation) of cholesterol in brain. The experimental design involves determining the rate of accumulation of cholesterol; this is calculated as the increasing amounts of sterol in brain at successive time intervals during development. The rate of appearance of newly synthesized cholesterol is determined from incorporation of radioactivity from 3H20 (injected i.p. several hours prior to sacrifice) into cholesterol. The radioactivity associated with the sterol fractions and the specific activity of body water determined from the serum can be used to calculate the absolute amount of sterol newly synthesized during the time when 3H20 was present. The results obtained demonstrated that all of the bulk cholesterol accumulating in brain can be accounted for by newly synthesized cholesterol. None of the radioactive cholesterol came from the circulation, since cholesterol feeding suppressed cholesterol biosynthesis in the liver and specific radioactivity of circulating cholesterol was negligible. Thus, almost all cholesterol accumulating in brain during development is locally synthesized.
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Morell P,Jurevics Hdoi
10.1007/BF02527711subject
Has Abstractpub_date
1996-04-01 00:00:00pages
463-70issue
4eissn
0364-3190issn
1573-6903journal_volume
21pub_type
杂志文章,评审abstract::Astrocytes transport the monocarboxylate acetate, but synaptosomes do not. The reason for this is unknown, because both preparations express monocarboxylate transporters (MCT). The transport and metabolism of lactate, another monocarboxylate, was examined in these two preparations, and the results were compared to tho...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/b:nere.0000010450.21586.a6
更新日期:2004-01-01 00:00:00
abstract::Neurovascular injury comprises a wide spectrum of pathophysiology that underlies the progression of brain injury after cerebral ischemia. Recently, it has been shown that activation of the integrin-associated protein CD47 mediates the development of blood-brain barrier injury and edema after cerebral ischemia. However...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-010-0159-6
更新日期:2010-07-01 00:00:00
abstract::Members of the PDGF family have multiple roles during embryogenesis and in a variety of pathological situations in the adult. One of the major sites of PDGF-B expression in adult mammals are postmitotic CNS neurons. Combined with reported neurotrophic and neuroprotective effects of exogenously administered PDGFs, this...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1022421001288
更新日期:2003-02-01 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::Ciliary neurotrophic factor (CNTF) is a promyelinating trophic factor that plays an important role in multiple sclerosis (MS). However, mechanisms by which CNTF expression could be increased in the brain are poorly understood. Recently we have discovered anti-inflammatory and immunomodulatory activities of sodium benz...
journal_title:Neurochemical research
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doi:10.1007/s11064-015-1723-x
更新日期:2015-11-01 00:00:00
abstract::Apoptosis can be defined as the regulated death of a cell and is conducted by conserved pathways. Apoptosis of neurons after injury or disease differs from programed cell death, in the sense that neurons in an adult brain are not "meant" to die and results in a loss of function. Thus apoptosis is an honorable process ...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1023/b:nere.0000014823.74782.b7
更新日期:2004-03-01 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::The volume-regulated anion channel, VRAC, plays an important role in cell volume regulation. This channel is permeable for a wide variety of anions, amino acids, and organic osmolytes, including taurine. However, nothing is known about possible water permeability of this channel. Water permeability of endothelial cell...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/b:nere.0000010430.23137.be
更新日期:2004-01-01 00:00:00
abstract::Epilepsy is a disorder of the brain characterized by an enduring predisposition to generate epileptic seizures. The glycolytic inhibitor 2-deoxy-D-glucose (2-DG) has been reported to exert antiepileptic effects by upregulating KATP subunits (kir6.1 and kir6.2). We evaluated whether 2-DG exhibits anti-seizure effect by...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-019-02734-3
更新日期:2019-04-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-016-1840-1
更新日期:2016-06-01 00:00:00
abstract::Sandhoff disease is an incurable neurodegenerative disorder caused by mutations in the lysosomal hydrolase β-hexosaminidase. Deficiency in this enzyme leads to excessive accumulation of ganglioside GM2 and its asialo derivative, GA2, in brain and visceral tissues. Small molecule inhibitors of ceramide-specific glucosy...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-013-0992-5
更新日期:2013-04-01 00:00:00
abstract::Alzheimer's disease (AD) is the most common form of dementia that progressively disrupts neurocognitive function, which has neither cure nor effective treatment. Hypercholesterolemia might be involved in brain alterations that could evolve into AD. The present study aims to evaluate the potential of omega-3, Co-enzyme...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-020-02996-2
更新日期:2020-05-01 00:00:00
abstract::Antipsychotics represent high affinity for sigma receptors and sigma-like drugs often have the psychotomimetic properties. Besides, the receptors are unevenly distributed in human brain. These findings suggest that sigma receptors might be involved in the pathophysiology of schizophrenia. Sigma receptors in rat and hu...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00966825
更新日期:1992-10-01 00:00:00
abstract::Using the mouse maximal electroshock test, the reference model of tonic-clonic seizures, the aim of the present study was to determine the type of interaction between mexiletine (a class IB antiarrhythmic drug) and classical antiepileptics: valproate, carbamazepine, phenytoin, and phenobarbital. Isobolographic analysi...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-015-1812-x
更新日期:2016-05-01 00:00:00
abstract::The study provides detailed biochemical correlates to the common histopathological diagnoses in epilepsy. A dot immunobinding procedure was used for quantification of NSE, GFA, S-100, NCAM, NF 68 and NF 200. The material consisted of samples from 48 patients either selected for surgical treatment of partial epilepsy o...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00967255
更新日期:1993-04-01 00:00:00
abstract::The decline in neuronal function during aging may result from increases in extracellular glutamate (Glu), Glu-induced neurotoxicity, and altered mitochondrial metabolism. To study metabolic responses to persistently high levels of Glu at synapses during aging, we used transgenic (Tg) mice that over-express the enzyme ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-014-1239-9
更新日期:2014-01-01 00:00:00
abstract::Aliskiren (ALK), a pharmacological renin inhibitor, is an effective antihypertensive drug and has potent anti-apoptotic activity, but it is currently unknown whether ALK is able to attenuate brain damage caused by acute cerebral ischemia independent of its blood pressure-lowering effects. This study aimed to investiga...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-016-1944-7
更新日期:2016-09-01 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::Parkinson's disease (PD) is a common progressive neurodegenerative disorder, for which at present no causal treatment is available. On the understanding that the causes of PD are mainly oxidative stress and mitochondrial dysfunction, antioxidants and other drugs are expected to be used. In the present study, we demons...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-009-0046-1
更新日期:2010-02-01 00:00:00
abstract::The regional distribution of 2-amino-4-phosphonobutyrate (APB)/chloride-insensitive L-[3H]glutamate binding sites in the rat central nervous system was compared with that of APB/chloride-sensitive and with sodium-dependent binding sites. The distribution of APB-sensitive and APB-insensitive sites was not correlated, b...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00963986
更新日期:1984-03-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-007-9343-8
更新日期:2007-10-01 00:00:00
abstract::The acetylcholinesterase from synaptosomal membranes is inhibited by anesthetics: Nembutal, brietal, and thiopental. Nembutal and brietal decrease the Km for acetylthiocholine, without changes in Vmas. A noncompetitive type of inhibition is produced by thiopental. This anesthetic decreases Arrhenius plot discontinuity...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00964714
更新日期:1980-07-01 00:00:00
abstract::Epilepsy is one of the oldest neurological conditions known to humankind. It is known that oxidative stress and generation of reactive oxygen species are a cause and consequence of epileptic seizures. Although recent years have seen tremendous progress in the molecular biology and metabolism of selenium, we still know...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-009-0015-8
更新日期:2009-12-01 00:00:00
abstract::Olfactory ensheathing cells (OECs) and Schwann cells (SCs) are closely-related cell types with regeneration-promoting properties. Comparative gene expression analysis is particularly relevant since it may explain cell type-specific effects and guide the use of each cell type into special clinical applications. In the ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-013-1006-3
更新日期:2013-05-01 00:00:00
abstract::The effect of hydrogen peroxide (H2O2) on cytosolic free calcium concentration ([Ca2+]c) as well as its effect on glutamate secretion in rat hippocampal astrocytes have been the aim of the present research. Our results show that 100 microM H2O2 induces an increase in [Ca2+]c, that remains at an elevated level while th...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-006-9078-y
更新日期:2006-06-01 00:00:00
abstract::Post-ischemic changes in energy metabolites and natural antioxidant compounds have been measured in rat brain in vitro concurrent with two different assays for peroxidized lipids. No exogenous free radical initiators were employed. In vitro oxygenation of minced brain preparations for periods of 10 minutes to 4 hours,...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965496
更新日期:1982-04-01 00:00:00
abstract::The aggravated risk on intracerebral hemorrhage (ICH) with drugs used for stroke patients should be estimated carefully. We therefore established sensitive quantification methods and provided a rat ICH model for detection of ICH deterioration. In ICH intrastriatally induced by 0.014-unit, 0.070-unit, and 0.350-unit co...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1022826220469
更新日期:2003-05-01 00:00:00
abstract::The mechanism of focal demyelination in multiple sclerosis has been a long-standing enigma of this disorder. Cytokines, a diverse family of signalling molecules, are viewed as potential mediators of the process based on clinical observations and studies with animal models and tissue/cell culture systems. Myelin and ol...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1023/a:1022493013904
更新日期:1998-03-01 00:00:00
abstract::Evidence that brain glutamatergic activity is pathologically elevated in bipolar disorder suggests that mood stabilizers are therapeutic in the disease in part by downregulating glutamatergic activity. Such activity can involve the second messenger, arachidonic acid (AA, 20:4n - 6). We tested this hypothesis with rega...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-008-9700-2
更新日期:2008-11-01 00:00:00
abstract::Insulin-like growth factor 1 (IGF-1) stimulates α-secretase processing of amyloid precursor protein (APP) and decreases Aβ production. Little is known about the relationship between IGF-1 and β-site amyloid precursor protein cleaving enzyme 1 (BACE-1), the protease essential for the production of β-amyloid peptides (A...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-010-0260-x
更新日期:2011-01-01 00:00:00