Animals 64 Male Rats nonhuman 64 protein expression controlled study 62 article 60 rat 60 male 52 priority journal 52 animal experiment 47 animal tissue 43 Rats, Sprague-Dawley 34 messenger RNA 32 animal cell 28 animal model 24 RNA, Messenger 23 Rats, Wistar 17 Humans 15 immunohistochemistry 15 unclassified drug 15 Female 13 cell proliferation 13 enzyme activity 13 human 13 protein function 13 Gene Expression Regulation 12 Mice 12 Rattus 12 Reverse Transcriptase Polymerase Chain Reaction 12