Animals 180 animal controlled study genetics priority journal nonhuman 178 metabolism 147 mouse 106 animal cell 102 Mice 98 Article 96 animal experiment 89 article 80 female 75 animal tissue 72 male 70 Female 67 human 66 Humans 62 Male 62 protein expression 62 unclassified drug 60 animal model 58 gene expression regulation 55 physiology 54 gene expression 52 messenger RNA 50 drug effects 46 drug effect 45 signal transduction 43