Animals 46 Mice human 46 human cell male Humans 44 nonhuman 44 mouse 42 controlled study 40 animal experiment 36 animal cell 32 article 32 priority journal 32 animal model 31 protein expression 30 Male 29 in vivo study 23 in vitro study 22 Cell Line, Tumor 19 female 19 animal 18 metabolism 16 Female 15 apoptosis 15 Article 14 pathology 14 unclassified drug 14 animal tissue 13 signal transduction 13 Apoptosis 12