Animals Humans nonhuman 220 human 206 priority journal 188 controlled study 150 article 146 Mice 110 animal 110 animal cell 110 protein expression 110 unclassified drug 104 mouse 100 metabolism 96 transcription regulation 94 human cell 78 genetic transcription 72 Transcription, Genetic 70 gene expression 70 signal transduction 70 gene expression regulation 68 messenger RNA 68 animal experiment 64 cell proliferation 62 genetics 62 Transcription Factors 58 Cell Line, Tumor 56 Signal Transduction 56 Gene Expression Regulation 54 animal model 54