human 67 human cell in vitro study protein expression controlled study 65 Humans 51 priority journal 48 nonhuman 42 female 39 article 35 Article 34 Female 33 Animals 32 animal experiment 32 in vivo study 32 animal model 30 animal cell 28 metabolism 28 mouse 28 unclassified drug 28 cell proliferation 24 male 23 Mice 22 Cell Proliferation 20 apoptosis 19 animal tissue 16 Apoptosis 15 Male 15 upregulation 15 Trophoblasts 14