title: Peripheral participation of the phosphodiesterase 3 on formalin-evoked nociception.
abstract: The local peripheral (subcutaneous) injection of phosphodiesterase 3 inhibitor trequinsin dose-dependently enhanced formalin-evoked flinching during late second phase of this test. Treatment with the nitric oxide synthase inhibitor N-L-nitro-arginine methyl ester or guanylyl cyclase inhibitor 1-H-[1,2,4,]oxadiazolo[4,3-a]quinoxalin-1-one significantly reversed trequinsin-induced pronociceptive effect. Results suggest that the peripheral phosphodiesterase 3 may play an important physiologic role on inflammatory pain by controlling cyclic AMP levels and therefore the nociceptor threshold.
authors.affiliation: Laboratorio Mecanismos del Dolor, Centro de Investigación y Posgrado, División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, México. jorge.torres@dacs.ujat.mx
authors.forename: Jorge E
authors.initials: JE
authors.lastname: Torres-López
authors.forename: Vinicio
authors.initials: V
authors.lastname: Granados-Soto
mesh_terms: D015105:3',5'-Cyclic-AMP Phosphodiesterases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D000818:Animals; D054684:Cyclic Nucleotide Phosphodiesterases, Type 3; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005260:Female; D005557:Formaldehyde; D006162:Guanylate Cyclase / Q000037:antagonists & inhibitors; D007279:Injections, Subcutaneous; D019331:NG-Nitroarginine Methyl Ester / Q000494:pharmacology; D019001:Nitric Oxide Synthase / Q000037:antagonists & inhibitors; D010069:Oxadiazoles / Q000494:pharmacology; D010146:Pain / Q000139:chemically induced / Q000201:enzymology* / Q000503:physiopathology; D010147:Pain Measurement / Q000379:methods; D011810:Quinoxalines / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D044005:Tetrahydroisoquinolines / Q000494:pharmacology; D013997:Time Factors
chemical_list: C095284:1H-(1,2,4)oxadiazolo(4,3-a)quinoxalin-1-one; D004791:Enzyme Inhibitors; D010069:Oxadiazoles; D011810:Quinoxalines; D044005:Tetrahydroisoquinolines; D005557:Formaldehyde; C035964:trequinsin; D019001:Nitric Oxide Synthase; D015105:3',5'-Cyclic-AMP Phosphodiesterases; D054684:Cyclic Nucleotide Phosphodiesterases, Type 3; D006162:Guanylate Cyclase; D019331:NG-Nitroarginine Methyl Ester