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A glycine reuptake inhibitor (GRI) is a type of
drug A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drugs are typically distinguished from food and substances that provide nutritional support. Consumption of drugs can be via insuffla ...
which inhibits the
reuptake Reuptake is the reabsorption of a neurotransmitter by a neurotransmitter transporter located along the plasma membrane of an axon terminal (i.e., the pre-synaptic neuron at a synapse) or glial cell after it has performed its function of transm ...
of the
neurotransmitter A neurotransmitter is a signaling molecule secreted by a neuron to affect another cell across a synapse. The cell receiving the signal, any main body part or target cell, may be another neuron, but could also be a gland or muscle cell. Neuro ...
glycine Glycine (symbol Gly or G; ) is an amino acid that has a single hydrogen atom as its side chain. It is the simplest stable amino acid (carbamic acid is unstable), with the chemical formula NH2‐ CH2‐ COOH. Glycine is one of the proteinogeni ...
by blocking one or more of the
glycine transporter Glycine transporters (GlyTs) are plasmalemmal neurotransmitter transporters. They serve to terminate the signaling of glycine by mediating its reuptake from the synaptic cleft back into the presynaptic neurons. There are two glycine transporters ...
s (GlyTs). Examples of GRIs include
bitopertin Bitopertin (developmental code names RG1678; RO-4917838) is a glycine reuptake inhibitor which was under development by Roche as an adjunct to antipsychotics for the treatment of persistent negative symptoms or suboptimally controlled positive ...
(RG1678), Org 24598,
Org 25935 ORG-25935, also known as SCH-900435 is a synthetic drug developed by Organon International, which acts as a selective inhibitor of the glycine transporter GlyT-1. In animal tests it reduces alcohol consumption and has analgesic and anticonvulsan ...
, ALX-5407, and
sarcosine Sarcosine, also known as ''N''-methylglycine, or monomethylglycine, is a monopeptide with the formula CH3N(H)CH2CO2H. It exists at neutral pH as the zwitterion CH3N+(H)2CH2CO2−, which can be obtained as a white, water-soluble powder. Like some ...
, which are selective
GlyT1 Sodium- and chloride-dependent glycine transporter 1, also known as glycine transporter 1, is a protein that in humans is encoded by the ''SLC6A9'' gene. Selective inhibitors Elevation of extracellular synaptic glycine concentration by blockade of ...
blockers, and
Org 25543 The Open Rights Group (ORG) is a UK-based organisation that works to preserve digital rights and freedoms by campaigning on digital rights issues and by fostering a community of grassroots activists. It campaigns on numerous issues including ma ...
and
N-arachidonylglycine ''N''-Arachidonylglycine (NAGly) is a carboxylic metabolite of the endocannabinoid anandamide (AEA). Since it was first synthesized in 1996, NAGly has been a primary focus of the relatively contemporary field of lipidomics due to its wide range ...
, which are selective GlyT2 blockers. Some weak and/or non-selective GlyT blockers include
amoxapine Amoxapine, sold under the brand name Asendin among others, is a tricyclic antidepressant (TCAs). It is the N-demethylated metabolite of loxapine. Amoxapine first received marketing approval in the United States in 1992 (approximately 30 to 40 ...
and
ethanol Ethanol (abbr. EtOH; also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound. It is an Alcohol (chemistry), alcohol with the chemical formula . Its formula can be also written as or (an ethyl ...
(
alcohol Alcohol most commonly refers to: * Alcohol (chemistry), an organic compound in which a hydroxyl group is bound to a carbon atom * Alcohol (drug), an intoxicant found in alcoholic drinks Alcohol may also refer to: Chemicals * Ethanol, one of sev ...
).


See also

*
Reuptake inhibitor Reuptake is the reabsorption of a neurotransmitter by a neurotransmitter transporter located along the plasma membrane of an axon terminal (i.e., the pre-synaptic neuron at a synapse) or glial cell after it has performed its function of transmit ...
*
Glycinergic A glycinergic agent (or drug) is a chemical which functions to directly modulate the glycine system in the body or brain. Examples include glycine receptor agonists, glycine receptor antagonists, and glycine reuptake inhibitors. See also * Adeno ...
*
GABA reuptake inhibitor 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 increa ...
*
Excitatory amino acid reuptake inhibitor An excitatory amino acid reuptake inhibitor (EAARI) is a type of drug which inhibits the reuptake of the excitatory neurotransmitters glutamate and aspartate by blocking one or more of the excitatory amino acid transporters (EAATs). Examples of ...


References

Glycine reuptake inhibitors {{nervous-system-drug-stub