γ-Aminobutyric acid

γ-Aminobutyric acid (4-Aminobutyric acid) is a major inhibitory neurotransmitter in the adult mammalian brain, binding to the ionotropic GABA receptors (GABA_A receptors) and metabotropic receptors (GABA_B receptors. γ-Aminobutyric acid shows calming effect by blocking specific signals of central nervous system^[1][2]. IC50 & Target:GABA Receptor^[1][2] In Vitro:γ-Aminobutyric acid (30 μM) depolarizes cortical progenitor cells (E16 cells), results an inward current in ventricular zone (VZ) cells, and induces DNA synthesis inhibition, with half-maximal response concentration of 5 μM^[3].
Cortical plate (cp) neurons expresses glutamic acid decarboxylase (GAD), γ-Aminobutyric acid (1-5 μM; 18 h) stimulates the motility and arrests the migration of cp cells, while the chemotropic signal is involved G-protein activation^[4].
γ-Aminobutyric acid activates GABA _A receptors, causing cell cycle arrest in S phase and limiting growth^[5].
In Vivo:γ-Aminobutyric acid (33.95, 102.25, 306.75 mg/kg; p.o.; single dose) can enhance the sleep of mice^[6].
γ-Aminobutyric acid (1, 2, 4 mg/kg/d; p.o.; 30 d) alleviates anxiety and restored food utilization rate in rats, with impairment induced by Di(2-ethylhexyl) phthalate (DEHP) exposure^[7].