Humans human 264 human cell controlled study 218 article 184 priority journal 174 metabolism 146 nonhuman 116 Animals 114 genetics 114 protein expression 102 unclassified drug 100 animal cell 88 Cell Line, Tumor 84 signal transduction 78 Article 74 genetic transfection 72 mouse 70 Cell Line 68 Transcription, Genetic 66 animal 66 Mice 64 cell line 58 gene expression 58 promoter region 58 cell proliferation 56 gene expression regulation 54 messenger RNA 54 Female 52 apoptosis 52