RPCs were grown in poly-L-lysine-coated 96-well plates and cultured for 1 day. After the transfection treatment, cells were treated with 30 μM VU0155041 or 10 μM Forskolin, with the control group medium just containing the same volume of solvent. After culturing for 3 days, the concentration of intracellular cAMP was detected using an ELISA kit (R&D Systems, United States). The absorbance was detected at 450 nm using a multi-microplate spectrophotometer (BioTek). Triplicate parallel wells were carried out, and the data were obtained from the average of at least three independent experiments.
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