Animals nonhuman 60 article 50 controlled study 50 priority journal 50 animal tissue 44 Nitric Oxide Synthase 40 animal experiment 40 nitric oxide synthase 40 nitric oxide 38 enzyme activity 36 Mice 30 mouse 30 Female 28 animal model 26 protein expression 26 signal transduction 26 female 24 male 24 Male 22 Nitric Oxide 22 animal cell 20 rat 20 Signal Transduction 18 Mice, Inbred BALB C 16 Rats 16 inducible nitric oxide synthase 14 unclassified drug 14 Enzyme Inhibitors 12 Mice, Inbred NOD 12