article human cell human 950 controlled study 742 Humans 686 priority journal 650 nonhuman 354 unclassified drug 320 Animals 318 protein expression 278 animal cell 238 Female 202 female 192 Mice 184 signal transduction 178 Cell Line, Tumor 174 mouse 172 male 170 Cell Line 168 cell proliferation 168 apoptosis 148 Male 146 metabolism 146 in vitro study 136 enzyme activity 124 protein function 124 Western blotting 110 Apoptosis 108 Cells, Cultured 104 adult 100