Gamma-aminobutyric acid neurotransmission (GABA neurotransmission)

Gamma-aminobutyric acid (GABA) is the principal inhibitory neurotransmitter in the mature mammalian central nervous system, mediating the primary mechanism for neuronal inhibition by activating GABA receptors on postsynaptic and presynaptic membranes[1][7]. GABA neurotransmission refers to the entire process of GABA synthesis, packaging, release into the synaptic cleft, binding to GABA receptors (primarily GABA-A and GABA-B types), and clearance from the synaptic space via uptake and metabolism[1][3][8]. GABAergic signaling is essential for maintaining the balance between neuronal excitation and inhibition, shaping cortical oscillations, regulating sleep, reducing anxiety, supporting cognitive function, and controlling motor activity[1][2][3][5][6]. Dysregulation of GABA neurotransmission is implicated in a variety of neurologic and psychiatric diseases, including epilepsy, anxiety and mood disorders, sleep disorders, and neurodegenerative diseases such as Alzheimer's and Parkinson's[2][3]. Many drugs exploit the GABA neurotransmission pathway—by enhancing GABAergic signaling (e.g., benzodiazepines, barbiturates, gabapentin) or inhibiting GABA breakdown or reuptake (e.g., vigabatrin, tiagabine)—to treat these conditions[5][7]. From a molecular perspective, GABA neurotransmission acts through ligand-gated ion channel GABA-A receptors (ionotropic), G protein-coupled metabotropic GABA-B receptors, as well as GABA-C (now often considered a subtype of GABA-A)[1][5][7]. GABAergic neurons and their associated circuits not only mediate inhibition, but are also critical in brain development, neuroplasticity, and overall homeostatic balance in neural networks[3][8]. **Note—Is the target correct?** "GABA neurotransmission" describes a process, not a single molecular target such as a receptor, enzyme, ion channel, or transporter. Thus, it is not a canonical target in the strict pharmacologic sense, although individual molecular components of GABA neurotransmission (such as the "GABA-A receptor" or "GABA-B receptor") are valid targets[1][5][7].

Other names

GABA signalingGABAergic neurotransmission

Positive allosteric modulation of GABA-A receptor, Agonism of GABA-B receptor, Inhibition of GABA reuptake, Inhibition of GABA transaminase, GABA receptor antagonism or inverse agonism