The expression patterns of cytochrome P450 1A1 (CYP1A1) andglutathione S-transferase, which are genes involved in phase I (drug oxidation) andphase II (drug conjugation) of drug metabolism, hepcidin, a key regulator of ironhomeostasis, and cathepsin L, a gene involved in tumour invasion and metastasis, weredifferent in each treatment group. The gene discussed is CYP1A1; the disease is neoplasm.