Glutamate and gamma-aminobutyric acid receptors (GluR/GABAR)

Glutamate and gamma-aminobutyric acid (GABA) receptors are the primary mediators of excitatory and inhibitory neurotransmission in the vertebrate central nervous system, respectively. Glutamate receptors are divided into ionotropic receptors (NMDA, AMPA, and kainate), which are ligand-gated ion channels, and metabotropic receptors (mGluRs), which are G protein-coupled receptors (StatPearls, 2023). GABA receptors are similarly divided into the ionotropic GABA-A receptor, which primarily conducts chloride ions to hyperpolarize neurons, and the metabotropic GABA-B receptor (NIH, 2022). The balance between these two systems, often referred to as the E/I balance, is critical for maintaining physiological brain states and supporting cognitive functions like learning and memory. Dysregulation of this balance is a hallmark of numerous neurological and psychiatric conditions, including epilepsy, anxiety disorders, and neurodegenerative diseases (PubMed, 2021). Therapeutic strategies involve modulating these receptors using agonists, antagonists, or allosteric modulators to restore normal signaling, though such interventions must carefully manage risks like sedation or excitotoxicity (PubChem, 2024).

Other names

GluR and GABARExcitatory and inhibitory amino acid receptorsGlutamate and gamma-aminobutyric acid receptor systems

Modulation of excitatory and inhibitory synaptic transmission through agonism, antagonism, or allosteric regulation of ionotropic and metabotropic receptors (StatPearls, 2023; PubChem, 2024).