The CellSensor™ T-REx™ FOXO3 DBE-bla HeLa cell line was engineered by lentiviral transduction of HeLa cervical cancer cells with a FOXO3 response element driving beta-lactamase expression, along with a tetracycline repressor and tetracycline (or the tetracycline analog doxycycline)-inducible FOXO3 constructs.