CYP19A1 and neoplasm: reduction of aromatase activity in MCF-7 cells with overexpression of aromatasereduction of cytochrome p450 aromatase (CYP19) mRNA and decrease in protein expression (especially the CYP19 I.3 and PII promoter)reduction of 17β-estradiol levels in MCF-7 AROM cellsreducing the size of the tumorreduction of CYP19 mRNA expression in the tumor