After knockdown of the CYP1A1 gene, experimental results showed (Fig. 6E, F) that the metastasis effect of breast cancer cells in the THC group was significantly inhibited compared with the solvent group, whereas the “wound recovery” ability and invasion ability of breast cancer cells in the sh-CYP1A1 group were also weakened. The gene discussed is CYP1A1; the disease is breast cancer.