Analysis of the Transcriptional Activity of Retinoic Acid-Related Orphan Receptors (RORs) and Inhibition by Inverse Agonists

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Abstract
Here, we describe several assays to analyze the transcriptional activity of retinoic acid-related orphan receptors (RORs) and the effect of inverse agonists on their activity. One assay measures the effect of an inverse agonist on the transcriptional activation of a luciferase reporter by RORs in a Tet-On cell system. A mammalian two-hybrid assay analyzes the interaction of the ROR ligand binding domain with a coactivator peptide. Two additional assays examine the effect of an inverse agonist on the activation of a luciferase reporter under control of the promoter of the ROR target gene, IL17, and on ROR-mediated activation using a mammalian monohybrid assay.

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