To assess ATF2 and c-JUN transcriptional activity, we implemented a dual secreted luciferase assay as previously described (20 (link)). At 48 hours after transfection, the cells were treated with specified drugs, and at the indicated times, media samples containing secreted lucifase were harvested and measured for luciferase activity using the Pierce Gaussia Luciferase Glow Assay Kit per manufacturer’s instructions (ThermoFisher).