human human cell metabolism Humans 261 controlled study 245 Article 148 priority journal 147 animal 125 article 125 Animals 123 unclassified drug 110 nonhuman 107 protein expression 105 genetics 104 female 93 signal transduction 91 mouse 85 animal cell 81 cell line 79 Female 76 Cell Line 74 drug effects 74 Mice 73 tumor cell line 73 in vitro study 72 Cell Line, Tumor 71 physiology 70 chemistry 67 cell proliferation 64 pathology 61