Abstract:Aryl hydrocarbon receptor (AHR) signaling pathway is a key pathway mediating cell oxidative stress (OS). AHR is a ligand-activated transcription factor that is highly expressed in multiple organs and tissues. It regulates the biochemical reactions including inflammation, metabolic disorders and cancer. It also participates in a variety of diseases caused by OS. This review focuses the vitiligo and diabetes that caused by OS response, trying to elucidate composition and function of the AHR signaling pathway. Better understanding AHR signaling pathway lays the foundation for the treatment of vitiligo and diabetes.