Abstract:
:A previously described inhibitor of the UDP-N-acetylgalactosamine: GM3, N-acetylgalactosaminyltransferase (GalNAc-T) (Quiroga et al., 1, 2), was purified from chicken blood serum by a new procedure. When subjected to SDS-PAGE, two major polypeptides of 27 and 70 kDa were observed. When tested in vitro, only the 27 kDa polypeptide inhibited the GalNAc-T. When added to chick cerebral embryonic neurons in culture, both polypeptides inhibited neuritogenesis. Both the 27 kDa and the 70 kDa fractions were present in the cells at 3 h following their addition to the cultures; both polypeptides had aneuritogenic activity and both inhibited the incorporation of [3H]-galactose into the cell gangliosides modifying their labeling pattern to a similar extent. Sequencing of the amino terminal end of the polypeptides showed that 18 and 9 amino acids from, respectively, the 27 and the 70 kDa polypeptides, were 100% homologues with the corresponding region of chick apolipoprotein Al (apo Al). After addition to cells in culture, no interconversion between the two polypeptides was detected after up to 20 h in culture. A monoclonal antibody that recognizes only the 70 kDa polypeptide, blocks its aneuritogenic effect without modifying that of the 27 kDa fraction. It is concluded that the endogenous inhibitor of GalNAc-T is apo Al.
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Conde CB,Grabois VR,Deza SN,Caputto BLdoi
10.1023/a:1027320113151subject
Has Abstractpub_date
1997-04-01 00:00:00pages
483-90issue
4eissn
0364-3190issn
1573-6903journal_volume
22pub_type
杂志文章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
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abstract::The calcium-activated phosphodiesteratic hydrolysis of 32P-labeled phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 4-phosphate in prelabeled nerve ending membranes is inhibited by the aminoglycosides neomycin and gentamicin, and to a lesser extent, by streptomycin. The inhibition is overcome by increasi...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965878
更新日期:1985-08-01 00:00:00
abstract::Using a model of middle cerebral artery occlusion (MCAO), we have previously demonstrated that treadmill exercise promotes angiogenesis in the ischemic penumbra through caveolin-1/VEGF signaling pathways. However, the function of caveolin-1/VEGF signaling in neurogenesis after MCAO has not been determined. In this stu...
journal_title:Neurochemical research
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doi:10.1007/s11064-016-2081-z
更新日期:2017-02-01 00:00:00
abstract::Pyridostigmine bromide (PB), an inhibitor of acetylcholinesterase, has been used as a prophylactic for nerve gas poisoning. N,N'-diethyl-m-toluamide (DEET) is the active ingredient in most insect repellents and is thought to interact synergistically with PB. Since PB can inhibit the binding of organophosphates to tubu...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1007527129743
更新日期:2000-01-01 00:00:00
abstract::The spontaneously hypertensive rat (SHR) has been proposed as an animal model for attention-deficit hyperactivity disorder (ADHD). The behavioural problems have been suggested to be secondary to altered reinforcement mechanisms in which nucleus accumbens dopaminergic activity plays an important role. Interaction betwe...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00973098
更新日期:1995-04-01 00:00:00
abstract::The maintaining of homeostasis in the organism in response to a variable environment is provided by the highly hierarchic neuroendocrine-immune system. The crucial component of this system is the hypothalamus providing the endocrine regulation of key peripheral organs, and the adenohypophysis. In this case, neuron-der...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-010-0127-1
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journal_title:Neurochemical research
pub_type: 杂志文章
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更新日期:2004-02-01 00:00:00
abstract::Remyelination promoting human IgMs effectively increase the number of myelinated axons in animal models of multiple sclerosis. Hence, they ultimately stimulate myelin production by oligodendrocytes (OLs); however, their exact mechanism of action remains to be elucidated, and in particular, it remains unclear whether t...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-018-2701-x
更新日期:2019-06-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965016
更新日期:1986-03-01 00:00:00
abstract::Neurons, purified by bulk-isolation procedures from 10 day-old rat brain, are 80-90% homogeneous. Contaminants are primarily blood vessels and occasional oligodendroglia. All sizes and shapes of neurons are obtained, as they are isolated from all areas of the brain, except the cerebellum. Neurotransmitter enzyme activ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00971368
更新日期:1987-01-01 00:00:00
abstract::Zinc (Zn2+) was shown to invariably inhibit muscimol-stimulated 36Cl- uptake by synaptoneurosomes in the cerebral cortex, hippocampus and cerebellum. The Zn2+ sensitivity of the GABAA receptor-gated 36Cl- uptake in the cerebral cortex was comparable to that in the hippocampus, whereas the uptake in the cerebellum was ...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF02532346
更新日期:1996-08-01 00:00:00
abstract::The effect of phenobarbital (100 mg/kg i.p.) and 6-aminonicotinamide (6AN) (35 mg/kg i.p.) on enzyme activities related to energy transduction was investigated on the homogenate "in toto", non-synaptic mitochondrial fraction and synaptosomal fraction isolated from different rat brain areas (cerebral cortex, hippocampu...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00971361
更新日期:1987-01-01 00:00:00
abstract::Chicken neurons in culture display measurable activities of mono- and diacylglycerol lipases. Treatment of chicken neuronal cultures with gangliosides (10(-8)M to 10(-5)M) resulted in a time and dose dependent increase in monoacylglycerol lipase activity. The diacylglycerol lipase showed significant increase in specif...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00966702
更新日期:1991-11-01 00:00:00
abstract::A previous study conducted in this laboratory revealed a decrease in total cholinesterase (total ChE) in the cerebral cortex, hippocampus and striatum in aged rats (24 months) of various strains, as compared with young animals (3 months). The purpose of the present experiments was to extend the study to other brain ar...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00969013
更新日期:1992-08-01 00:00:00
abstract::The concentration of vitamin E (alpha-tocopherol) was measured in samples of cortex from patients with Alzheimer's disease (AD), fetuses with Down's syndrome (DS), and also in a group of centenarians. The mean tocopherol concentrations in the two patient groups did not differ significantly from appropriate controls. W...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00965511
更新日期:1989-12-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00971006
更新日期:1987-07-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00966781
更新日期:1993-06-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/a:1010939530412
更新日期:2001-03-01 00:00:00
abstract::The tyrosine phosphatase inhibitor BpV(phen) stimulated a concentration-dependent increase of phospholipase C (PLC) activity in bovine adrenal medullary chromaffin cells. This response was accompanied by an increase in PLCgamma1 tyrosine phosphorylation and its cytosketetal translocation. Insulin, at high concentratio...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1023/b:nere.0000042211.76499.c6
更新日期:2004-10-01 00:00:00
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更新日期:1995-08-01 00:00:00
abstract::Neonatal hypoxia/ischemia (HI) is the most common cause of developmental neurological, cognitive and behavioral deficits in children, with hyperoxia (HHI) treatment being a clinical therapy for newborn resuscitation. Although cerebral edema is a common outcome after HI, the mechanisms leading to excessive fluid accumu...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-010-0308-y
更新日期:2010-12-01 00:00:00
abstract::We analyzed two disease model groups with rats infected by Japanese encephalitis virus (JEV), a 90-day group and a 180-day group after JEV infection. The time measured by the modified pole test showed that motor activities in these two groups were slower than those of age-matched control groups. Striatal dopamine (DA)...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-006-9197-5
更新日期:2006-12-01 00:00:00
abstract::Tumor Necrosis Factor Receptor Super Family 6 gene (TNFRSF6), also known as FAS, encodes the Fas antigen, a cell surface receptor mediating cell apoptosis, situated on chromosome 10q located near the region of linkage to sporadic Alzheimer's disease (sAD). FAS levels have been reported elevated in the brain of AD pati...
journal_title:Neurochemical research
pub_type: 杂志文章
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更新日期:2007-09-01 00:00:00
abstract::In the unrestrained rat, the hyperphagic-like ingestion of food evoked by the sustained elevation of neuropeptide-Y (NPY) in the hypothalamus was correlated with the release and turnover of monoaminergic transmitters in this structure. A single guide tube was implanted stereotaxically in the perifornical region of the...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00967290
更新日期:1992-11-01 00:00:00
abstract::The extracellular amino acid content was measured in the parietal cortex in portacaval and sham operated rats, using the brain dialysis technique. The amino acid content of the perfusate was determined for 10 min before and during stimulation with potassium chloride. Basal levels of aspartate, glutamine, glycine, meth...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/BF00972136
更新日期:1987-03-01 00:00:00
abstract::Tau is a protein involved in regulation of microtubule stability, axonal differentiation and transport. Alteration of retrograde transport may lead to motor neuron degeneration. Thus alternative mRNA splicing and expression of tau isoforms were studied in a transgenic mouse model harboring the human SOD1 G93A mutation...
journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-006-9057-3
更新日期:2006-05-01 00:00:00
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pub_type: 杂志文章
doi:10.1007/s11064-016-1965-2
更新日期:2016-10-01 00:00:00
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journal_title:Neurochemical research
pub_type: 杂志文章
doi:10.1007/s11064-009-9915-x
更新日期:2009-08-01 00:00:00
abstract::It has been established that oligodendrocytes, the myelin forming cells, participate in iron homeostasis through the synthesis and secretion of transferrin. Here we investigated whether a correlation exists between myelination, the commonly studied function of oligodendrocytes, and that of transferrin synthesis and se...
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pub_type: 杂志文章
doi:10.1007/s11064-004-1826-2
更新日期:1999-02-01 00:00:00