Abstract
Peroxisome proliferator-activated receptors are a family of nuclear hormone receptors that control the expression of genes involved in a variety of physiologic processes, through heterodimerization with retinoid X receptor and complex formation with various cofactors. The specific cofactors recruited to PPAR-RXR complexes in response to different ligands lead to major differences in the transactivation of target genes. We developed a cofactor recruitment assay that is based on an europium-labeled anti-GST antibody and streptavidin-APC leading to a fluorescence resonance energy transfer signal. This assay allows for the determination of unique agonistic profiles in terms of potency and co-activator motif. Hence, it is a valuable drug discovery tool to support hit finding and lead optimization campaigns, enabling the characterization of next generation PPAR agonists.
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