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| | Binding Assay |
| Description: | Receptor binding was performed using membrane fractions prepared from the HEK-293 cell line recombinantly expressing rat 5-HT7 receptors (NCBI accession NM_022938). Compound affinity for the rat 5-HT7 receptor subtype was evaluated by competitive radioligand binding assays using 5-carboxamido[3H]tryptamine ([3H]5-CT) (Amersham Biosciences, cat. 90000403) detection. HitHunter cAMP assays are in-vitro based competitive immunoassays. The assay was performed on the HEK-293 cell line stably transfected with r5-HT7 receptor. Cells were pre-incubated with test compounds for 10 minutes. For antagonist testing, the cells were then challenged with 100 nM 5-CT for 20 minutes. Cells were then lysed and cAMP measured according to manufacturers protocol (Amersham, cat. NET791250UC) or [3H]mesulergine (Amersham, cat. TRK1041). The assay was performed on membranes prepared from HEK-293 cells stably transfected with h5-HT6. Following centrifugation, membranes were resuspended and incubated for 60 min at room temperature with 1.7 nM [3H]LSD in the presence of increasing concentration of test compounds. Nonspecific binding was defined in the presence of 10 μM clozapine (Tocris, cat. TRK1068). Homogenized HEK-293 membranes expressing the human SERT were incubated in 50 mM Tris-HCl (pH 7.5), 120 mM NaCl, 5 mM KCl with [3H]-citalopram (3 nM) with or without test compounds. Nonspecific binding was determined in the presence of 10 μM fluoxetine. Radioactivity readouts and Ki values were performed as previously described for r5-HT7. |
| Affinity data for this assay | |
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