Biochem/physiol Actions
Loreclezole (R72063) is a sedative and anticonvulsant that exerts subtype-selective positive allosteric modulator (PAM) potency toward beta2 (β2)- or β3-containing GABAA gamma-aminobutyric acid (GABA) receptors (% potentiation by 1 μM Loreclezole of GABA EC20-stimulated current/human α1βγ2 = 100/α1β2γ2, 120/α1β3γ2, 13/α1β1γ2; α1β2γ2 EC50 = 1 μM) with >300-fold lower β1 affinity, while acting as a negative allosteric modulator (NAM) against the homomeric rho1 (ρ1) GABAA-rho receptor (rat GABAC IC50 = 0.5 μM against GABA EC10-induced current).
Sedative & anticonvulsant with beta2-/beta3- (β2-/β3-) selective GABAA receptor PAM and GABAC (GABAA-rho receptor) NAM activity.