glutaminase/seizures

The activities of glutaminase, glutamine synthetase (GS), arginase and ornithine amino transferase (orn-T) were studied in three regions of rat brain in heightened neuronal activity by producing convulsions by leptazol. These enzymes were studied in preconvulsive, convulsive and postconvulsive

The activity of glutamate related enzymes and the concentration of glutamine, glutamate and gamma-amino n-butyric acid (GABA) were investigated in the cerebral cortex of rats, in different stages of insulin-induced hypoglycemia. Hypoglycemia was produced by intraperitoneal injection of insulin

The effect of administration of chlorpromazine on the activity of glutamine synthetase and glutaminase and the content of glutamate and gamma-aminobutyric acid (GABA) in different regions of rat brain was studied in an investigation of the possible role of these amino acids in the lowering of the

Patients with mesial temporal lobe epilepsy (MTLE) have increased basal concentrations of extracellular glutamate in the epileptogenic versus the non-epileptogenic hippocampus. Such elevated glutamate levels have been proposed to underlie the initiation and maintenance of recurrent seizures, and a

Activity of glutaminase (both phosphate-dependent and phosphate-independent forms of the enzyme) as well as glutamate decarboxylase activity were studied in hyperoxia (6 ati) and under conditions of protection by means of arginine from the effect of hyperoxia. In hyperoxia activity of

As a promising method for treating intractable epilepsy, the inhibitory effect of low-frequency stimulation (LFS) is well known, although its mechanisms remain unclear. Excessive levels of cerebral glutamate are considered a crucial factor for epilepsy. Therefore, we designed experiments to

There is compelling evidence that initiation and maintenance of epileptic seizures in temporal lobe epilepsy (TLE) is facilitated by excessive accumulation in the extracellular (perisynaptic) space of the excitatory neurotransmitter glutamate (Glu). This review discusses the mechanisms underlying

The mechanism by which pentylenetetrazole provokes convulsions in animals has been investigated by measuring its influence in vitro on the activities of several enzymes of glutamate metabolism in rat brain homogenates. Pentylenetetrazole does not affect the specific activities of glutamine

Using pentylenetetrazol (PTZ) kindling, we collected hippocampal tissue from standard response and kindling resistant animals, measuring hippocampal mRNA with real-time PCR of glutamate transporters GLAST, GLT-1, and EAAC1 and the sodium-coupled neutral amino acid transporter (SNAT) 1, SNAT2, and

The cerebral concentrations of pyridoxal-5'-phosphate and divalent transition metal ions (Cu2+ and Zn2+) are appreciably higher in the seizure-susceptible strain of mouse (DBA/2J) than those in normal strains (CBA/Ca and Parkes ). By injecting metal ions intracranially and pyridoxal-5'-phosphate

Amitraz is a formamidine pesticide that has been reported to be a neurotoxic compound that induces convulsions among other effects. Excitatory and inhibitory neurotransmission is mediated mainly by glutamate and GABA, respectively, so their alteration could be responsible for induction of seizures.

Signaling through bioactive lipids regulates nervous system development and functions. Lysophosphatidic acid (LPA), a membrane-derived lipid mediator particularly enriched in brain, is able to induce many responses in neurons and glial cells by affecting key processes like synaptic plasticity,

As reported previously, in the lithium-pilocarpine model of temporal lobe epilepsy (TLE), carisbamate (CRS) produces strong neuroprotection, leads to milder absence-like seizures, and prevents behavioral impairments in a subpopulation of rats. To understand the metabolic basis of these effects, here