Reverse Transcriptase Polymerase Chain Reaction 42 article gene expression Animals 38 controlled study 38 nonhuman 38 priority journal 34 animal cell 30 Mice 24 Male 22 RNA, Messenger 22 Humans 20 animal experiment 20 mouse 20 protein expression 20 reverse transcription polymerase chain reaction 20 Blotting, Western 18 Immunohistochemistry 18 RNA 18 animal tissue 16 cell proliferation 16 female 16 human 16 male 16 messenger RNA 16 nucleotide sequence 16 Genes 14 human cell 14 Apoptosis 12 Cell Proliferation 12