Metabotropic glutamate receptor 1, 7, and 8 (mGluR1/7/8)

Metabotropic glutamate receptors 1, 7, and 8 (mGluR1, mGluR7, mGluR8) are G protein-coupled receptors that modulate excitatory neurotransmission in the central nervous system. mGluR1 belongs to Group I and is primarily postsynaptic, coupled to Gq proteins to increase intracellular calcium and promote neuronal excitability and synaptic plasticity. In contrast, mGluR7 and mGluR8 belong to Group III and are typically located presynaptically, where they couple to Gi/o proteins to inhibit adenylate cyclase and reduce the release of glutamate or other neurotransmitters. These receptors are critical for normal brain function, and their dysregulation is implicated in various neurological and psychiatric conditions, including schizophrenia, anxiety, and neurodegenerative disorders. Therapeutic strategies involve using allosteric modulators to fine-tune receptor activity, though achieving subtype selectivity remains a significant challenge in drug development.

Other names

mGlu1mGlu7mGlu8GRM1GRM7GRM8Metabotropic glutamate receptor 1Metabotropic glutamate receptor 7Metabotropic glutamate receptor 8

Drugs targeting these receptors act as orthosteric agonists/antagonists or positive/negative allosteric modulators (PAMs/NAMs) to either enhance or inhibit glutamatergic signaling and modulate synaptic excitability.