Glutamate (L-Glutamic acid) (Glu)

Glutamate is the primary excitatory neurotransmitter in the mammalian central nervous system, playing a fundamental role in synaptic plasticity, learning, and memory (StatPearls, 2023). It functions by binding to and activating ionotropic receptors, such as NMDA, AMPA, and kainate receptors, as well as metabotropic G protein-coupled receptors (mGluRs) (NCBI, 2014). Under normal physiological conditions, glutamate levels are tightly regulated by excitatory amino acid transporters (EAATs) to prevent excessive signaling. However, pathological elevations in glutamate levels can lead to excitotoxicity, a process where overactivation of receptors causes an influx of calcium, leading to neuronal damage and death (PubMed, 2020). This mechanism is a key driver in acute neurological insults like stroke and chronic neurodegenerative diseases such as Amyotrophic Lateral Sclerosis (ALS) and Alzheimer's disease. Conversely, dysregulation or hypofunction of the glutamatergic system is associated with psychiatric disorders, including schizophrenia and depression (NIH, 2021). Therapeutic interventions often target the receptors or transporters to modulate glutamatergic activity, with drugs like memantine acting as an NMDA receptor antagonist and riluzole inhibiting glutamate release (PubChem, 2024).

Other names

L-GlutamateL-Glutamic acid2-Aminopentanedioic acidGlutaminic acid

Modulation of glutamate release, antagonism of ionotropic glutamate receptors (NMDA, AMPA), and regulation of glutamate uptake via transporters.