Task: Named Entity Recognition
Input (English):  The induction by dexamethasone of rat liver CYP3A1 differs from classical glucocorticoid gene regulation in part because both glucocorticoids and antiglucocorticoids such as pregnenolone 16 alpha - carbonitrile ( PCN ) induce CYP3A1 through transcriptional gene activation .
Output (English): rat liver CYP3A1