human cell human 916 controlled study 752 Humans 686 article 684 priority journal 644 nonhuman 380 protein expression 372 Animals 336 unclassified drug 322 animal cell 272 metabolism 254 signal transduction 234 mouse 206 Article 196 Female 194 Mice 192 Cell Line 184 cell proliferation 182 female 182 Cell Line, Tumor 176 male 168 protein function 154 apoptosis 150 in vitro study 150 Male 140 Western blotting 134 animal experiment 130 enzyme activity 126 animal 124