animal cell controlled study nonhuman 42 real time polymerase chain reaction 40 Animals 34 priority journal 30 Article 24 animal tissue 22 messenger RNA 22 animal experiment 20 mouse 20 protein expression 20 unclassified drug 20 Mice 18 animal 18 animal model 18 article 18 Male 16 Western blotting 16 gene expression 16 human 16 metabolism 16 Humans 14 male 14 Real-Time Polymerase Chain Reaction 12 female 12 human cell 12 protein function 12 signal transduction 12 Blotting, Western 10