controlled study gene expression real time polymerase chain reaction 32 nonhuman 30 article 22 Animals 20 priority journal 18 Male 16 animal cell 16 messenger RNA 16 metabolism 14 protein expression 14 Article 12 Humans 12 Real-Time Polymerase Chain Reaction 12 genetics 12 male 12 nucleotide sequence 12 Western blotting 10 cell proliferation 10 human 10 mouse 10 unclassified drug 10 Cell Proliferation 8 DNA microarray 8 Female 8 Gene Expression Regulation 8 Mice 8 Oligonucleotide Array Sequence Analysis 8 RNA, Messenger 8