Animals animal experiment animal tissue male nonhuman 388 controlled study 352 Male 336 article 290 priority journal 288 mouse 186 Mice 184 animal model 168 animal 138 animal cell 138 female 120 rat 112 Rats 104 protein expression 104 Article 100 metabolism 100 Female 94 physiology 78 messenger RNA 72 unclassified drug 68 enzyme activity 64 Rats, Sprague-Dawley 60 drug effects 56 immunohistochemistry 56 drug effect 54 hippocampus 52