N-methyl-D-aspartate receptor and alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (NMDA/AMPA receptor)

The N-methyl-D-aspartate (NMDA) and alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors are the primary ionotropic glutamate receptors mediating fast excitatory neurotransmission in the central nervous system (StatPearls, 2023). AMPA receptors are responsible for the majority of fast excitatory signaling, while NMDA receptors act as molecular coincidence detectors, requiring both glutamate binding and membrane depolarization to remove a magnesium block and allow calcium influx (NCBI, 2022). This calcium entry is a critical trigger for synaptic plasticity, including long-term potentiation (LTP), which underlies learning and memory. Dysfunction in these receptor systems is linked to various pathologies; for instance, overactivation leads to excitotoxicity in stroke and neurodegeneration, while hypofunction is associated with schizophrenia (PubMed, 2021). Therapeutic strategies include NMDA antagonists like memantine for Alzheimer's disease and AMPA antagonists like perampanel for epilepsy (FDA, 2023).

Other names

Ionotropic glutamate receptorsiGluRsGlutamate-gated ion channelsGlutamate receptors, ionotropic

Antagonism of ionotropic glutamate receptors to modulate excitatory signaling and prevent calcium-mediated excitotoxicity (StatPearls, 2023; PubMed, 2022).