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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]
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]
Escitalopram, a selective serotonin reuptake inhibitor (SSRI) used as an antidepressant.. Reuptake inhibitors (RIs) are a type of reuptake modulators.It is a drug that inhibits the plasmalemmal transporter-mediated reuptake of a neurotransmitter from the synapse into the pre-synaptic neuron.
Tiagabine increases the level of γ-aminobutyric acid (GABA), the major inhibitory neurotransmitter in the central nervous system, by blocking the GABA transporter 1 (GAT-1), and hence is classified as a GABA reuptake inhibitor (GRI). [4] [13]
GABA receptor antagonists are drugs that inhibit the action of GABA. 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.
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.
SSRIs (selective serotonin reuptake inhibitors), which debuted in the 1980s, work on serotonin. SNRIs (serotonin and norepinephrine reuptake inhibitors) hit serotonin and norepinephrine.
Gabaculine – neurotoxin; GABA-T inhibitor and GABA reuptake inhibitor Gabapentin – anticonvulsant; inhibitor of α 2 δ subunit-containing VGCCs Gabapentin enacarbil – used for the treatment of restless legs syndrome and postherpetic neuralgia ; same mechanism of action as gabapentin