male protein expression controlled study 289 nonhuman 274 priority journal 232 Male 222 article 215 animal experiment 209 Animals 208 animal tissue 156 animal cell 147 mouse 136 female 127 animal model 113 human 111 Mice 108 Female 91 Humans 91 Article 86 animal 84 metabolism 82 human cell 81 messenger RNA 78 rat 76 unclassified drug 76 adult 62 immunohistochemistry 60 cell proliferation 59 Rats 54 in vivo study 52