| Assay Method Information | |
| | Activity of Compounds in PSA Luciferase Assay |
| Description: | The biological activity of analogs 5-16, 18, 20, 26, JJ-450, and the resolved enantiomers JJ-450A and J-450B was determined and compared to HTS hit 1 (IC50 7.3 μM) and MDV3100 (IC50 1.1 μM) using the Dual-Glo luciferase system (Promega, WI, USA) in C4-2-PSA-rl cells, which were generated by transfection with PSA6.1-luc and pRL-TK followed by stable selection using G418 and puromycin. C4-2-PSA-rl stable cells were cultured in RPMI 1640 medium with 10% FBS, 1% penicillin-streptomycin, 1% L-glutamine, 10 mg/mL puromycin, and 50 mg/mL G418. C4-2-PSA-rl cells were seeded in 24-well plates such that they reached 75-80% cell monolayer density after 24 h. C4-2-PSA-rl cells were then treated for 24 h with 0, 0.2, 0.8, 3.2, 12.8, or 25 μM of each compound dissolved in DMSO (0.8% DMSO/well) in the presence of 1 nM synthetic androgen R1881, with each experimental condition in triplicate. The cells were also treated in parallel with 12.8 μM compound 1 and 12.8 μM MDV3100 as positive controls. Each compound was tested in at least two independent experiments. Luciferase activity was assayed using the Dual-Luciferase Reporter Assay System (Promega) using LMax II Microplate Reader (Molecular Devices). The luciferase assay results were acquired using SoftMax Pro5.45 software (Molecular Devices) and analyzed using GraphPad Prism. PSA6.1-luc activity was normalized to the Renilla luciferase activity. Relative luciferase activity was calculated as the quotient of androgen-induced PSA-firefly/Renilla luciferase activity. Since PSA promoter activity correlates to AR transcriptional activity, inhibition of AR will result in decreased PSA-luciferase activity. IC50 values were calculated using GraphPad Prism and data represent the mean and SD of 2-6 independent experiments. |
| Affinity data for this assay | |
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