animal experiment nonhuman 346 controlled study 302 Animals 298 priority journal 274 article 260 animal tissue 206 mouse 206 gene expression 182 Mice 178 protein expression 164 animal cell 150 female 150 male 150 animal model 146 Female 144 Male 132 animal 112 metabolism 108 unclassified drug 102 messenger RNA 98 gene expression regulation 88 RNA, Messenger 86 Article 82 Humans 80 rat 80 Gene Expression Regulation 78 Rats 78 genetics 78 human 70