Aryl hydrocarbon receptor has come into the focus of schizophrenia research because of some indices that dysregulation of AHR signaling could have potentially disruptive effects on GABA interneurons with expected effects on inhibitory brain signaling [61], as well as involvement in oxidative stress and neuroinflammation in astrocytes, a crucial brain compartment of kynurenic acid production [64]. This evidence concerns the gene AHR and schizophrenia.