Azo CompoundsNitric OxideNitric Oxide Donorspara-AminobenzoatesNitrogen OxidesNitric Oxide SynthaseProdrugsNitric Oxide Synthase Type IINitric Oxide Synthase Type IIINitric Oxide Synthase Type ING-Nitroarginine Methyl EsterArginineNitritesomega-N-MethylarginineEnzyme InhibitorsNitratesAmino Acid OxidoreductasesS-Nitroso-N-AcetylpenicillamineCyclic GMPOxidesNitroprussidePenicillamineEndothelium, VascularVasodilationMolsidomineGuanylate CyclaseNitroarginineRats, Sprague-DawleyS-NitrosoglutathioneVasodilator AgentsS-NitrosothiolsRats, WistarCells, CulturedDose-Response Relationship, DrugZinc OxideLipopolysaccharidesNADPH DehydrogenaseEnzyme InductionPeroxynitrous AcidIndazolesOxadiazolesSuperoxidesExhalationAcetylcholineBreath TestsGuanidinesMacrophagesFree Radical ScavengersBlood PressureRNA, MessengerAdministration, InhalationMice, Inbred C57BLVasoconstrictionTriazenesSignal TransductionAortaOxidative StressArginaseMuscle RelaxationMuscle, Smooth, VascularRegional Blood FlowTime FactorsHydrazinesMice, KnockoutOxygenNitrosationGene Expression Regulation, Enzymologic