| Assay Method Information | |
| | Glucocorticoid Receptor Transactivation Potencies for Cortisol and 17-ester Derivatives |
| Description: | Glucocorticoid receptor (GR) activation potency was assessed using a HeLa cell line containing the MMTV-bla reporter (MMTV-bla HeLa CELLSENSOR , Invitrogen Corp., Carlsbad, Calif.). This cell line was stably transfected with an expression construct containing β-lactamase cDNA under control of the MMTV response element previously identified as a glucocorticoid receptor response element.Results from one experiment performed in duplicate for 9 compounds and the control compound, dexamethasone, are summarized in Table 3. All assays were performed as 10-point dose responses using a half log-fold dilution series starting with a maximum compound concentration of 100 nM. The compounds were incubated for 5 hours. The activation of endogenous GR leads to expression of the reporter β-lactamase which is detected by the conversion of a FRET substrate in a ratiometric assay format. This functional assay allows for measurement of receptor agonism by compounds and can be used to determine compound potency and selectivity. |
| Affinity data for this assay | |
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