CHEMBL5734911

Receptor Binding Assay: 5-HT1A: Radioligand binding was performed using membranes from CHO-K1 cells stably transfected with the human 5-HT1A receptor. All assays were carried out in duplicates. 50 μL working solution of the tested compounds, 50 μL [3H]-8-OH-DPAT (final concentration 1 nM, Kd 0.8 nM) and 150 μL diluted membranes (10 μg protein per well) prepared in assay buffer (50 mM Tris-HCl, pH 7.4, 10 mM MgCl2, 0.1 mM EDTA, 0.1% ascorbic acid) were transferred to polypropylene 96-well microplate using 96-wells pipetting station Rainin Liquidator (MettlerToledo). Serotonin (10 μM) was used to define nonspecific binding. Microplate was covered with a sealing tape, mixed and incubated for 60 minutes at 27° C. The reaction was terminated by rapid filtration through GF/C filter mate presoaked with 0.3% polyethyleneimine for 30 minutes. Ten rapid washes with 200 μL 50 mM Tris-HCl buffer (4° C., pH 7.4) were performed using automated harvester system Harvester-96 MACH III FM (Tomtec). The filter mates were dried at 37° C. in forced air fan incubator and then solid scintillator MeltiLex was melted on filter mates at 90° C. for 5 minutes. Radioactivity was counted in MicroBeta2 scintillation counter (PerkinElmer) at approximately 30% efficiency. Data were fitted to a one-site curve-fitting equation with Prism 6 (GraphPad Software) and Ki values were estimated from the Cheng-Prusoff equation.