| Assay Method Information | |
| | Competition Binding Assay |
| Description: | To determine the affinity of CB2R-specific ligands, we used a simple competition kinetic binding assay. This approach involves the simultaneous addition of both fluorescent ligand and competitor to the CB2R preparation. 62.5 nM 8-SiR, concentration which avoid ligand depletion in this assay volume, were added simultaneously with increasing concentrations of the unlabeled compound to CB2R cell membranes (4 μg per well) in 40 μL of assay buffer in a 384-well plate incubated at room temperature with orbital mixing. The degree of fluorescent ligand bound to the receptor was assessed at equilibrium by HTRF detection. Nonspecific binding was determined as the amount of HTRF signal detected in the presence of SR144528 (1 μM) and was subtracted from total binding, to calculate specific binding for construction of IC50 curves. |
| Affinity data for this assay | |
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