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| | Functional Uptake Assay (hSERT) |
| Description: | Inhibition of human serotonin reuptake transporter was assayed using the recombinant human serotonin transporter expressed in HEK-293 cells. HEK-293 cells expressing human serotonin transporter were plated before the assay. Test compound and/or vehicle was preincubated with cells in modified HEPES buffer pH 7.1 or pH 7.4 for 20 minutes at 18 to 25° C. and 65 nM [3H]serotonin was then added for an additional timed incubation period (ten to thirty minutes). Cells with internalized [3H]serotonin were washed and the amount of tritium taken into cells is counted using a liquid scintillation counter to determine [3H]serotonin uptake. Non-specific binding of tritium was measured in a control reaction containing 10 uM fluoxetine, and was subtracted from the counts for assays to correct for non-specific binding of tritium. Reduction of [3H]serotonin uptake by 50 percent or more (50%) relative to an uninhibited control reaction indicates significant inhibitory activity. Compounds were screened at 10, 1, 0.1, 0.01 and 0.001 uM. The reference compound for the assay was fluoxetine, for which the IC50 value of 7.1 nM was obtained in a typical experiment. |
| Affinity data for this assay | |
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