Glycine reuptake inhibitor

Glycine reuptake inhibitor (GRI) is a type of pharmaceutical drug that functions by inhibiting the glycine transporter. This action increases the concentration of glycine in the synaptic cleft, which can have various effects on neurological and psychiatric conditions.

Mechanism of Action

The primary function of a glycine reuptake inhibitor is to inhibit the action of the glycine transporter. This transporter is responsible for the reuptake of glycine from the synaptic cleft back into the neuron. By inhibiting this process, GRIs increase the concentration of glycine in the synaptic cleft.

Glycine is an important neurotransmitter in the central nervous system, where it serves as an inhibitory neurotransmitter in the spinal cord and brainstem, and a co-agonist along with glutamate at the NMDA receptor. By increasing the availability of glycine, GRIs can enhance NMDA receptor function.

Clinical Uses

Glycine reuptake inhibitors have potential therapeutic applications in a variety of neurological and psychiatric conditions. These include schizophrenia, obsessive-compulsive disorder (OCD), and certain types of neuropathic pain.

In schizophrenia, GRIs may help to alleviate negative symptoms and cognitive deficits, which are not effectively treated by current antipsychotic medications. In OCD, GRIs may reduce symptoms by enhancing NMDA receptor function. In neuropathic pain, GRIs may work by reducing hyperexcitability in the spinal cord.

Side Effects

As with any medication, glycine reuptake inhibitors can have side effects. These may include nausea, vomiting, diarrhea, and dizziness. More serious side effects can include seizures and hallucinations. It is important for patients to discuss potential side effects with their healthcare provider before starting treatment with a GRI.

See Also

• Glycine transporter
• Neurotransmitter
• NMDA receptor
• Schizophrenia
• Obsessive-compulsive disorder
• Neuropathic pain