ARE-Luc/EF1α-mCherry Reporter Cell Line - TE-1

ARE-Luc/EF1α-mCherry Reporter Cell Line - TE-1 is a stable dual-reporter line built on the human TE-1 esophageal squamous cell carcinoma background. It carries a firefly luciferase gene under the control of the antioxidant response element (ARE), a cis-acting enhancer sequence recognized by the Nrf2 transcription factor when cells face oxidative or electrophilic stress. The human elongation factor 1 alpha (EF1α) promoter drives constitutive mCherry expression in the same cells. Because EF1α activity stays relatively constant under most experimental conditions, the red fluorescence serves as an internal reference for cell number and viability, letting researchers normalize luciferase readings without extra transfection or control constructs.

Its primary job is to track Nrf2/ARE signaling in live cells. Treatments that raise reactive oxygen species, deplete glutathione, or modify the Keap1 sensor stabilize Nrf2, which then moves into the nucleus and drives luciferase output from the ARE cassette. That makes the line handy for ranking antioxidants and chemopreventive agents, profiling Nrf2 activators, and working out how cellular defense pathways respond to oxidative challenge. It also adapts well to high-throughput screening: on a 96- or 384-well plate the readout is simply substrate addition followed by luminescence measurement, and the mCherry signal can correct for well-to-well differences in cell density. Beyond drug discovery, the cells are useful for studying oxidative stress in esophageal biology, for evaluating environmental toxicants and electrophilic compounds, and for testing genetic or CRISPR manipulations that touch the Nrf2 pathway, including time-course experiments on cytoprotective gene induction.