cyclic AMP responsive element binding protein 44 priority journal 42 human 40 article 36 controlled study 34 Humans 32 human cell 32 cyclic AMP 30 signal transduction 30 promoter region 26 Animals 24 nonhuman 24 enzyme activation 20 protein phosphorylation 20 unclassified drug 20 Cyclic AMP Response Element-Binding Protein 18 cyclic AMP dependent protein kinase 18 cyclic AMP responsive element binding protein binding protein 18 transcription factor 18 cyclic AMP responsive element 16 gene expression regulation 16 plasmid 16 protein expression 16 transcription regulation 16 Cell Line 14 Cyclic AMP 14 Mice 14 Signal Transduction 14 animal cell 14 messenger RNA 14