Animals 85 animal 85 animal tissue controlled study genetics metabolism nonhuman 85 priority journal 60 animal experiment 56 mouse 54 Article 52 Mice 44 messenger RNA 43 female 42 male 41 Female 36 Male 35 animal cell 35 animal model 33 gene expression 33 unclassified drug 32 article 31 RNA, Messenger 30 protein expression 30 immunohistochemistry 27 physiology 27 gene expression regulation 26 Humans 24 drug effects 24 human 24