nonhuman 144 article 124 4 aminobutyric acid 118 priority journal 118 controlled study 104 Animals 88 gamma-Aminobutyric Acid 82 animal experiment 66 Male 60 rat 54 unclassified drug 54 male 50 animal cell 48 metabolism 44 GABA 42 4 aminobutyric acid A receptor 40 Rats 40 animal 40 animal tissue 40 Receptors, GABA-A 38 Saccharomyces cerevisiae 36 Saccharomyces cerevisiae Proteins 32 drug effect 32 human 32 GABA Plasma Membrane Transport Proteins 30 mouse 30 aminolevulinic acid 28 drug receptor binding 28 4 aminobutyric acid receptor 26 Article 26