Glutamate ionotropic receptor kainate type subunit 1 (GRIK1) (GluK1)

The GluK1-containing kainate receptor is a subtype of ionotropic glutamate receptor that functions as a ligand-gated cation channel, primarily permeable to sodium and potassium ions [1, 2]. It is composed of tetrameric assemblies of subunits, where the GluK1 subunit (encoded by the GRIK1 gene) is a key component that can form homomeric or heteromeric complexes with other kainate subunits like GluK2, GluK4, or GluK5 [2, 3]. These receptors are widely distributed in the central nervous system, particularly in the hippocampus, cortex, and amygdala, where they modulate synaptic transmission and plasticity through both ionotropic and non-canonical metabotropic signaling pathways [5, 6]. GluK1-containing receptors are significant therapeutic targets due to their involvement in the pathophysiology of epilepsy, chronic pain, migraine, and alcohol use disorder [4, 5]. Pharmacological modulation of these receptors, particularly through selective antagonists, aims to reduce neuronal hyperexcitability and restore synaptic balance [2, 5]. However, the development of GluK1-targeted therapies must navigate challenges related to subunit selectivity and the potential for cognitive side effects, as seen with non-selective agents like topiramate [4, 5].

Other names

GRIK1GluR5EAA3EEA3GLR5Glutamate receptor ionotropic kainate 1Glutamate ionotropic receptor kainate type subunit 1

Antagonist, Agonist, Partial agonist, Allosteric modulation