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| | In Vitro Receptor Binding Activity Screening Assay |
| Description: | Reagents:HEK-blue hTLR7 cell and HEK-blue hTLR8 cell (available from InvivoGen)DMEM mediumheat inactivated fetal bovine serumAnti Mycoplasma reagent Normocin bleomycinblasticidinScheme:1. Preparation of 96-well compound plate:The compounds were gradient diluted with DMSO in 3-fold using liquid work station POD starting at a concentration of 10 mmol/L and 10 points were diluted (2nd column to 11th column, and each point was duplicated). At 12th column, 1 μL of 5 mg/mL positive compound R848 was added as positive control; and at 1st column, 1 μL of DMSO was added as negative control. Each well contained 1 μL of DMSO.2. The cells in culture flask were collected and the cell density was diluted to 250,000 cells/mL.3. 200 μL (50,000 cells/well) of cell suspension was added into prepared compound plate and the final concentration of DMSO in each well was 0.5%.4. The culture plates containing cells and the compounds were incubated in CO2 incubator for 24 h at 37° C., 5% CO2.5. After 24 h incubation, 20 μL of supernatant was removed from each well to a 96-well transparent assay plate. To each well of the assay plate was added 180 μL of Quanti-Blue reagent and the plate was incubated in an incubator at 37° C., 5% CO2 for 1 h.6. After 1 h, the content of alkaline phosphatase in 20 μL of supernatant was determined using Microplate Reader OD650.7. EC50 of each compound was obtained with Prism software. |
| Affinity data for this assay | |
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