animal cell human 272 human cell nonhuman 268 controlled study 236 Animals 218 Humans 214 priority journal 196 article 194 mouse 150 Mice 134 protein expression 134 unclassified drug 126 animal experiment 88 animal 78 metabolism 78 signal transduction 74 animal model 68 female 68 Cell Line 60 Article 58 Female 58 male 58 protein function 54 Cell Line, Tumor 52 cell proliferation 52 Signal Transduction 46 rat 46 in vitro study 44 Male 42