Phosphodiesterase InhibitorsAdenosine1-Methyl-3-isobutylxanthine3',5'-Cyclic-AMP PhosphodiesterasesRolipramPhosphoric Diester HydrolasesCyclic AMPPurinones4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneTheophylline3',5'-Cyclic-GMP PhosphodiesterasesCyclic Nucleotide Phosphodiesterases, Type 4Receptor, Adenosine A2AReceptor, Adenosine A1Phosphodiesterase 3 InhibitorsCyclic GMPXanthinesPhosphodiesterase 4 InhibitorsMilrinoneCyclic Nucleotide Phosphodiesterases, Type 3Purinergic P1 Receptor AntagonistsPhosphodiesterase 5 InhibitorsPapaverineAdenosine A2 Receptor AntagonistsPyrrolidinonesAdenosine DeaminaseAdenosine A1 Receptor AntagonistsInterleukin 1 Receptor Antagonist ProteinCyclic Nucleotide Phosphodiesterases, Type 5Receptor, Adenosine A3Dose-Response Relationship, DrugColforsinReceptors, Purinergic P1Phosphodiesterase ICyclic Nucleotide Phosphodiesterases, Type 12',3'-Cyclic-Nucleotide PhosphodiesterasesBucladesineReceptor, Adenosine A2BPentoxifyllineNeurokinin-1 Receptor AntagonistsAdenylate CyclasePyridazinesPurinesReceptors, Adenosine A2Adenosine KinaseSulfones8-Bromo Cyclic Adenosine MonophosphateRats, Sprague-DawleyAdenosine A2 Receptor AgonistsNucleotides, CyclicIsoproterenolRats, WistarGuinea PigsAdenosine A1 Receptor AgonistsAdenosine-5'-(N-ethylcarboxamide)CalciumPhenylisopropyladenosinePiperazinesKineticsCells, CulturedPurinergic P1 Receptor AgonistsAminophyllinePiperidinesTetrazolesHistamine H2 AntagonistsSerotonin 5-HT3 Receptor AntagonistsExcitatory Amino Acid AntagonistsEnoximoneCyclic AMP-Dependent Protein KinasesAdenosine A3 Receptor AntagonistsDipyridamoleDopamine AntagonistsVinca AlkaloidsAdenosine MonophosphateAngiotensin Receptor AntagonistsTriazinesSerotonin 5-HT2 Receptor AntagonistsHormone AntagonistsPyridinesVasodilator AgentsPurinergic P2 Receptor AntagonistsTime FactorsImidazolesAmrinoneThionucleotidesRats, Inbred StrainsNitric OxideIsoquinolinesBufo bufoEnzyme ActivationCyclic Nucleotide Phosphodiesterases, Type 2Stimulation, ChemicalDibutyryl Cyclic GMPAlprostadilEnzyme InhibitorsSignal TransductionPhotoreceptor CellsNarcotic AntagonistsReceptors, PurinergicCyclic Nucleotide Phosphodiesterases, Type 6