Base Sequence 1 Bewo cell 1 Blotting, Western 1 Cell Line, Tumor 1 Chorionic Gonadotropin 1 Cyclic AMP 1 Cyclic AMP-Dependent Protein Kinases 1 DNA Primers 1 EPAC protein 1 Enzyme Activation 1 Female 1 Guanine Nucleotide Exchange Factors 1 Humans 1 Leptin 1 MAP Kinase Signaling System 1 Placenta 1 Pregnancy 1 Rap1 protein 1 Real-Time Polymerase Chain Reaction 1 article 1 cell line 1 cell strain JEG 3 1 chorionic gonadotropin 1 controlled study 1 cyclic AMP 1 cyclic AMP dependent protein kinase 1 cyclic AMP dependent protein kinase inhibitor 1 cyclic AMP derivative 1 cyclic AMP responsive element 1 cyclic AMP responsive element binding protein 1