Humans 22 MCF-7 Cells human 22 controlled study 18 metabolism 18 Cell Line, Tumor 16 Female 16 female 16 tumor cell line 16 Animals 14 Article 14 animal 14 mouse 14 Breast Neoplasms 12 MCF 7 cell line 12 Mice 12 human cell 12 nonhuman 12 MCF-7 cell line 10 animal experiment 10 animal model 10 breast cancer 10 breast tumor 10 cell proliferation 10 drug effects 10 pathology 10 unclassified drug 10 Breast cancer 8 Cell Proliferation 8 Drug Screening Assays, Antitumor 8