Glutamate ionotropic receptor AMPA type subunit 1 (GluA1) (GluA1)

Glutamate ionotropic receptor AMPA type subunit 1 (GluA1), encoded by the GRIA1 gene, is a core subunit of the ionotropic AMPA receptor (AMPAR) complex, which mediates the majority of fast excitatory neurotransmission in the mammalian brain (UniProt P42261). These receptors are tetrameric assemblies, and GluA1-containing AMPARs are particularly essential for the induction of long-term potentiation (LTP), a cellular mechanism fundamental to learning and memory (PubMed: 25414315). In pathological states, excessive activation of GluA1-containing receptors contributes to excitotoxicity and seizure activity in epilepsy, while their downregulation or dysfunction is linked to cognitive deficits in Alzheimer's disease and schizophrenia (PubMed: 30243539). Therapeutic strategies targeting GluA1 include non-competitive antagonists like perampanel, which is FDA-approved for epilepsy to reduce neuronal over-excitation (StatPearls: Perampanel). Additionally, positive allosteric modulators, known as AMPAkines, have been investigated for their potential to enhance cognitive function by prolonging the open-time of the ion channel (PubMed: 16116620). Safety concerns for drugs affecting this target often involve central nervous system side effects such as dizziness, ataxia, and potential behavioral changes (FDA Label: Fycompa). The target remains a high-interest area for neuropharmacology due to its central role in synaptic strength and plasticity.

Other names

GRIA1GluR1GluR-AGlutamate ionotropic receptor AMPA type subunit 1GLUH1

Non-competitive or competitive antagonism to inhibit excitatory signaling, or positive allosteric modulation to enhance synaptic strength.