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Gamma-aminobutyric acid (GABA), the major inhibitory neurotransmitter in the brain, mediates neuronal inhibition by binding to GABA receptors. The type A GABA receptors are pentameric chloride channels assembled from among many genetic variants of GABA(A) subunits. This gene encodes the gamma 2 subunit of GABA(A) receptor.
Most neurons secrete with glutamate or GABA. Glutamate is excitatory, meaning that the release of glutamate by one cell usually causes adjacent cells to fire an action potential. (Note: Glutamate is chemically identical to the MSG commonly used to flavor food.) GABA is an example of an inhibitory neurotransmitter. Monoamine neurotransmitters:
In molecular biology and physiology, something is GABAergic or GABAnergic if it pertains to or affects the neurotransmitter gamma-aminobutyric acid (GABA). For example, a synapse is GABAergic if it uses GABA as its neurotransmitter, and a GABAergic neuron produces GABA.
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 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]
Gamma-aminobutyric acid, a GABA-B receptor agonist. A GABA receptor agonist is a drug that is an agonist for one or more of the GABA receptors, producing typically sedative effects, and may also cause other effects such as anxiolytic, anticonvulsant, and muscle relaxant effects. [1] There are three receptors of the gamma-aminobutyric acid. The ...
[36] [37] [38] Although the term "GABA С receptor" is frequently used, GABA С may be viewed as a variant within the GABA A receptor family. [7] Others have argued that the differences between GABA С and GABA A receptors are large enough to justify maintaining the distinction between these two subclasses of GABA receptors.
The mechanism behind this action is unclear however, [11] with some researchers suggesting that FQs may act as low-affinity GABA-A antagonists, [12] and others positing that its interactions with N-methyl-D-aspartate (NMDA) receptors, which have been associated with fear, anxiety, and depression, may be responsible for the anxiogenic effects.