Partial agonist activity at human 5-HT2C receptor expressed in HEK293 cells preincubated for 1 hr at 37 degC followed by incubated for 15 mins at room temperature by IP-One assay
Partial agonist activity at human 5-HT2C receptor expressed in HEK293 cells preincubated for 1 hr at 37 degC followed by incubated for 15 mins at room temperature by IP-One assay relative to 5-HT
Antagonist activity at human 5HT2C receptor expressed in HEK293 cells assessed as inhibition of serotonin-induced inositol monophosphate accumulation after 1 hr by FRET assay
Binding Assay: For serotonin 5-HT2A binding, an aliquot of human recombinant serotonin 5-HT2A receptor (PerkinElmer Life and Analytical Sciences, USA) expressed in CHO-K1 cells (5 ug/well) and 1 nM [3H]Ketanserin (PerkinElmer) were used in the presence of mianserin (20 uM) as a nonspecific. The reaction mixture was incubated for 60 min at 27° C. using 50 mM Tris-HCl (pH 7.4) buffer containing 4 mM CaCl2 and 0.1% ascorbic acid, and harvested through filtermate A glass fiber filter (Wallac, Finland) presoaked in 0.5% polyethyleneimine (PEI) by microbeta filtermate-96 harvester (PerkinElmer) to terminate the reaction, and then washed with ice cold 50 mM Tris-HCl buffer solution (pH 7.4). The filter was then covered with MeltiLex, sealed in a sample bag, dried in an oven. The radioactivity retained in the filter was finally counted using MicroBeta Plus (Wallac). For serotonin 5-HT2C binding, frozen membranes from stable CHO-K1 cell line expressing the human recombinant 5-HT2C receptor.