The Ahr helps in the inhibitory effects of 2-(4-hydroxy-3-methoxyphenyl)-benzothiazole (YL-109) on development and invasion of MDA-MB-231 (breast adenocarcinoma cell line) by upregulation of Hsp70-interacting protein (CHIP). It regulates invasiveness and metastasis of breast cancer cells. It mediates various biological responses to extensive environmental pollutants.