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A GABA reuptake inhibitor (GRI) is a type of drug which acts as a reuptake inhibitor for the neurotransmitter gamma-Aminobutyric acid (GABA) by blocking the action of the gamma-Aminobutyric acid transporters (GATs). This in turn leads to increased extracellular concentrations of GABA and therefore an increase in GABAergic neurotransmission. [1]
In general these drugs produce stimulant and convulsant effects, and are mainly used for counteracting overdoses of sedative drugs. Examples include bicuculline, securinine and metrazol, and the benzodiazepine GABA A receptor antagonist flumazenil. Other agents which may have GABA A receptor antagonism include the antibiotic ciprofloxacin, [1 ...
A GABA A receptor negative allosteric modulator is a negative allosteric modulator (NAM), or inhibitor, of the GABA A receptor, a ligand-gated ion channel of the major inhibitory neurotransmitter γ-aminobutyric acid (GABA). [1] [2] They are closely related and similar to GABA A receptor antagonists.
A GABAergic or GABAnergic agent is any chemical that modifies the effects of GABA in the body or brain. Some different classes of GABAergic drugs include agonists, antagonists, modulators, reuptake inhibitors and enzymes. [1]
Vigabatrin reduced cholecystokinin tetrapeptide-induced symptoms of panic disorder, in addition to elevated cortisol and ACTH levels, in healthy volunteers. [12]Vigabatrin is also used to treat seizures in succinic semialdehyde dehydrogenase deficiency (SSADHD), which is an inborn GABA metabolism defect that causes intellectual disability, hypotonia, seizures, speech disturbance, and ataxia ...
DABA's main action is being an inhibitor of GABA transaminase, an enzyme that converts GABA back to glutamate. When the enzyme is inhibited, this conversion cannot happen, therefore, GABA levels are elevated. [1] It has also been observed that 2,4-diaminobutyric acid is a GABA reuptake inhibitor. [2] This action further elevates levels of GABA.
The gabapentinoid drugs do not bind significantly to other known drug receptors and so the α 2 δ VGCC subunit has been called the gabapentin receptor. [ 15 ] [ 4 ] Recently, the same α 2 δ-1 protein has been found closely associated not with VGCCs but with other proteins such as presynaptic NMDA-type glutamate receptors , cell adhesion ...
Recent research has produced several ligands which are moderately selective for GABA A receptors containing the α 5 subunit. These have proved to be useful in investigating some of the side effects of benzodiazepine and nonbenzodiazepine drugs, particularly the effects on learning and memory such as anterograde amnesia .