Abstract:
:In an effort to develop an animal model of hyperpipecolatemia, the uptake of pipecolic acid (PA) in the brain and changes of PA levels in serum following administration of D,L-PA were studied in the mouse using a new sensitive HPLC-EC method. Following i.p. injections (250 mg/kg) to adult male mice, the brain concentration peaks at 5-10 min (40 nmol/g). The level remains relatively stable up to 5 hrs and then declines slowly to 24 hrs. In serum, the level of PA increases rapidly to reach the maximum value at 10 min and then decreases rapidly in the first hour and continues to decline more slowly to 24 hrs. The net uptake of PA following administration of various amounts of D,L-PA is saturable at low doses (3.9-15.6 mg/kg), and it increases linearly at higher doses in a dose-dependent manner up to the maximum dose (500 mg/kg) used in the present study. Kinetic analysis suggests the presence of two kinds of transport systems. These findings are in good agreement with the previous results using D,L-[3H]PA in the mouse (7) and L-[14C]PA in the rat (13). There were no significant differences between uptake of D-pipecolic acid and L-pipecolic acid (250 mg/kg, i.p., 10 min), suggesting the absence of stereospecificity for PA uptake in the mouse brain. Developmental changes in net brain uptake of PA following injections of D,L-PA (250 mg/kg, s.c., 10 min) showed an age-dependent decrease which continues until adult levels are reached at four weeks after birth. The results suggest that the blood brain barrier (BBB) for PA is completed during the first month of life. Following administration of D,L-PA (250 mg/kg, s.c.) to pregnant mice during the period 19-21 days of gestation, PA level increases in fetal brain to a maximum value at 2 hrs (420 nmol/g). This level is unchanged during 24 hrs. The maximum level of PA in fetal serum is reached at 30 min to 1 hr. The level gradually decreases after 1 hr over 24 hrs. These results indicate that PA taken up by the placenta and into the brain is transported from the fetal circulation.(ABSTRACT TRUNCATED AT 400 WORDS)
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Kim JS,Giacobini Edoi
10.1007/BF00964981subject
Has Abstractpub_date
1985-10-01 00:00:00pages
1405-15issue
10eissn
0364-3190issn
1573-6903journal_volume
10pub_type
杂志文章abstract::Salsolinol, an endogenous neurotoxin, is known to be involved in the pathogenesis of Parkinson's disease (PD). In the present study, we have investigated the effects of salsolinol on the activation of two different signaling pathways that involve c-Jun N-terminal kinase (JNK), and nuclear factor-kappaB, (NF-kappaB) in...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-006-9246-0
更新日期:2007-03-01 00:00:00
abstract::Intracerebral hemorrhage (ICH) is an important public health problem in neurology, which is not only associated with high mortality but also leading to disability. Yet no satisfactory treatment has been developed. The secondary injury that resulted from a number of self-destructive processes such as neuroinflammation,...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-017-2179-y
更新日期:2017-05-01 00:00:00
abstract::The metabolic effects of ganglioside GM1 were found to be quite different in brain synaptosomes and phagocytic cells. Incubation of rat brain cortex synaptosomes with GM1 was shown to decrease the production of reactive oxygen species induced by Fe2+-H2O2 system and measured by chemiluminometric method in the presence...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1020296605444
更新日期:2002-08-01 00:00:00
abstract::In our previous study vesamicol, an inhibitor of the acetylcholine transporter of the cholinergic vesicles, inhibited veratridine-evoked external Ca(2+)-dependent acetylcholine release from striatal slices but did not influence acetylcholine release observed in Ca(2+)-free medium (4). Here we examined if the effect of...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00968780
更新日期:1992-06-01 00:00:00
abstract::Somatostatin (SS) is an inhibitory regulator of secretory and proliferative responses that activates a group of receptors in the plasma membrane termed SSR1-5. SSR2 is one of the most abundant SSR, which also is expressed in high numbers in many neuroendocrine tumor types. Here, we describe a study of the presence and...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1022848718109
更新日期:2003-04-01 00:00:00
abstract::Effects of methylmercury (MetHg) on the specific [3H]flunitrazepam binding were studied in rat cortical and cerebellar P2-fractions in vitro. MetHg did not affect significantly the specific [3H]flunitrazepam binding in unwashed P2-fraction but increased it marginally (by 16%) at 100 microM in washed P2-fraction, in bo...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF01705532
更新日期:1995-06-01 00:00:00
abstract::Hypoglycemia is the major problem to blood glucose homeostasis in treatment of diabetes and is associated with severe irreversible consequences including seizures, coma and death. GABAergic inhibitory function in the cerebral cortex plays an important role in controlling the excitability and responsiveness of cortical...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-010-0210-7
更新日期:2010-10-01 00:00:00
abstract::The effect of optic nerve transsection on proteolytic degradation of axonally transported proteins in the superior colliculus of the rabbit was studied. Proteolysis of labeled proteins was determined in vitro in small pieces of the superior colliculus. Within 2 hours after sectioning the optic nerve there was a decrea...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00973280
更新日期:1988-07-01 00:00:00
abstract::Müller cells, the predominant glial cells in the retina, are thought to play important roles in the survival of retinal neurons. Previous studies have demonstrated that Müller cells express brain-derived neurotrophic factor (BDNF), which has a pronounced neurotrophic effect on retinal ganglion cells. In this study, we...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-005-7936-7
更新日期:2005-09-01 00:00:00
abstract::The phospholipid requirement for Ca2+-stimulated, Mg2+-dependent ATP hydrolysis (Ca2+/Mg2+-ATPase) and Mg2+-stimulated ATP hydrolysis (Mg2+-ATPase) in rat brain synaptosomal membranes was studied employing partial delipidation of the membranes with phospholipase A2 (Hog pancreas), phospholipase C (Bacillus cereus) and...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00966224
更新日期:1986-10-01 00:00:00
abstract::The aim of this study is to investigate differences in thyroid-stimulating hormone (TSH) level in patients with acute schizophrenia, unipolar depression, bipolar depression and bipolar mania. Serum level of TSH was measured in 1,685 Caucasian patients (1,064 women, 63.1%; mean age 46.4). Mean serum TSH concentration w...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-014-1305-3
更新日期:2014-07-01 00:00:00
abstract::Brofaromine, a selective and reversible inhibitor of monoamine oxidase-A (MAO-A) was given to 19 women while 17 received placebo for 8 weeks. All met DSM III-R criteria for bulimia nervosa, a psychiatric disorder in which uncontrolled overeating episodes are accompanied by purging activities and extreme concerns about...
journal_title:Neurochemical research
pub_type: 临床试验,杂志文章
doi:10.1007/BF00975048
更新日期:1993-12-01 00:00:00
abstract::Calpains, cathepsins and caspases play crucial role in mediating cell death. In the present study we observed a cascade of events involving the three proteases during middle cerebral artery occlusion (MCAo) in Wistar rats. The rats were MCA occluded and reperfused at various time points. We observed a maximal increase...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-007-9567-7
更新日期:2008-11-01 00:00:00
abstract::Mitochondrially bound brain hexokinase is solubilized by anesthetics and this effect has been suggested to contribute to anesthesia. In the present investigation the influence of the metabolic inhibitor 2-deoxy-D-glucose (2-DOG) was studied. An isolated rat brain preparation was used to avoid the contribution of perip...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965526
更新日期:1982-06-01 00:00:00
abstract::The preventive effect of dietary taurine supplementation on glial alterations in retina of streptozotocin-induced diabetic rats was examined in this study. Blood glucose content, content of taurine, glutamate and
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-008-9763-0
更新日期:2009-02-01 00:00:00
abstract::It is known that the NMDA-R NR1 subunit is needed for the receptor activity and that under hypoxia the evolution toward apoptosis or neuronal survival depends on the balance NR2A/NR2B subunits. This paper analyzes the effect of acute hypoxia on the above mentioned subunits mRNAs during development. The mean percentage...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-010-0221-4
更新日期:2010-10-01 00:00:00
abstract::Caspase activation and apoptotic events may take place in terminal regions far removed from the cell body and contribute to synapse loss in neurodegenerative diseases. For examination of events in terminals, we have developed a cell-free assay using quantitative flow cytometric analysis (fluorescence-activated cell so...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1019840417796
更新日期:2002-06-01 00:00:00
abstract::Rat posterior eyecups containing the retina were prepared, loaded with [(3)H]glycine and superfused in order to determine its release originated from glycinergic amacrine cells and/or glial cells. Deprivation of oxygen and glucose from the Krebs-bicarbonate buffer used for superfusion evoked a marked increase of [(3)H...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-015-1713-z
更新日期:2016-02-01 00:00:00
abstract::The concept of exosomes has been progressively changed from the status of cellular trashcans to multitasking organelles involved in many processes, including internalization, transport and transfer of macromolecules such as proteins, lipids and nucleic acids. While underpinning the mechanisms behind neurodegeneration ...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1007/s11064-020-03111-1
更新日期:2020-11-01 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::Previous studies have shown that chronic administration of SR-3 (a 1:4 mixture of alpha-linolenic and linoleic acid) affects spatial learning, thermoregulation, pain threshold and protection from seizures. The mode of action is unknown. One possible explanation is that the preparation induces changes in the fatty acid...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1022430620205
更新日期:1998-05-01 00:00:00
abstract::In this review article, we summarize recently accumulated knowledge regarding the molecular mechanisms, which control retinal development. Retinal neurons are born in two waves of cytogenesis. In the first wave, neurons of cone circuitry are generated, whereas in the second wave, rod circuitry is added. Neurons genera...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1023/a:1007696112956
更新日期:2000-10-01 00:00:00
abstract::Specific [3H]MK801 binding to rat brain NMDA receptors after the administration of the convulsant drug 3-mercaptopropionic acid (MP) and the adenosine analogue cyclopentyladenosine (CPA) was studied by means of a quantitative autoradiographic method. MP administration (150 mg/kg, i.p.) caused significant decreases in ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1020708603495
更新日期:1998-10-01 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::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::Studies on primary astrocytes cultured in vitro have shown that process formation involves changes in cytoskeletal proteins and release of tension on the substratum. Actin filament reorganization has previously been found to be the major cytoskeletal change occurring during process formation. These changes are relativ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1022413718447
更新日期:1998-03-01 00:00:00
abstract::Glutamate dehydrogenase (GDH) is a homohexameric enzyme that catalyzes the reversible oxidative deamination of L-glutamate to 2-oxoglutarate. Only in the animal kingdom is this enzyme heavily allosterically regulated by a wide array of metabolites. The major activators are ADP and leucine and inhibitors include GTP, p...
journal_title:Neurochemical research
pub_type: 杂志文章,评审
doi:10.1007/s11064-013-1173-2
更新日期:2014-01-01 00:00:00
abstract::In this paper we propose a powerful procedure to measure functional activation of the mouse delta-opioid receptor transiently expressed in mammalian cells. Receptor stimulation was assessed using a population of electroporated COS cells, transfected at a 50% efficiency. Under those conditions, agonist-promoted activat...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF02532371
更新日期:1996-11-01 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::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