cell structure controlled study 126 nonhuman 114 article 104 priority journal 102 Animals 74 animal cell 74 human 58 animal experiment 48 human cell 48 Article 42 male 40 Humans 38 unclassified drug 38 protein expression 36 animal tissue 34 apoptosis 32 female 30 mouse 30 signal transduction 30 Apoptosis 26 Female 26 Mice 26 animal 26 enzyme activity 24 rat 22 Western blotting 20 cell death 20 cell proliferation 20 cellular distribution 20