title: Antinociceptive effect and gastroprotective mechanisms of 3,5-diprenyl-4-hydroxyacetophenone from Ageratina pichinchensis.
abstract: The present study aimed to evaluate the antinociceptive activity (in inflammatory and neuropathic pain models) and gastroprotective effect of the 3,5-diprenyl-4-hydroxyacetophenone (HYDP), isolated from Ageratina pichinchensis. The gastroprotective activity of this plant was previously reported by our workgroup, finding encesanescin to be one active compound. The present results show that HYDP reduced nociception in a dose-dependent manner in carrageenan and L5/L6 spinal nerve ligation, with efficacies of 72.6 and 57.1%, respectively, at doses of 100 and 562 mg/kg. HYDP also showed gastroprotective activity in the model of ethanol-induced gastric lesion, with a 75.59% maximum inhibition of ulcers at a dose of 100mg/kg. This gastroprotective effect was attenuated by N(G)-nitro-L-arginine methyl ester, indomethacin and N-ethylmaleimide, indicating that NO, prostaglandins and sulfhydryl groups are involved in the mechanisms of action. This is the first evidence, to our knowledge, of the antinociceptive and gastroprotective activities of HYDP.
authors.affiliation: Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, Colonia Santo Tomás, Delegación Miguel Hidalgo, México, D F Mexico. mesmendoza@hotmail.com
authors.forename: María Elena
authors.initials: ME
authors.lastname: Sánchez-Mendoza
authors.forename: Juan
authors.initials: J
authors.lastname: Rodríguez-Silverio
authors.forename: José Fausto
authors.initials: JF
authors.lastname: Rivero-Cruz
authors.forename: Héctor Isaac
authors.initials: HI
authors.lastname: Rocha-González
authors.forename: Jorge Baruch
authors.initials: JB
authors.lastname: Pineda-Farías
authors.forename: Jesús
authors.initials: J
authors.lastname: Arrieta
mesh_terms: D000098:Acetophenones / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D036603:Ageratina / Q000737:chemistry*; D000700:Analgesics / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D000818:Animals; D002351:Carrageenan; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D000431:Ethanol; D005765:Gastrointestinal Agents / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use; D007249:Inflammation / Q000188:drug therapy* / Q000378:metabolism; D008026:Ligation; D008297:Male; D009437:Neuralgia / Q000188:drug therapy* / Q000378:metabolism; D009569:Nitric Oxide / Q000378:metabolism; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use; D018515:Plant Leaves / Q000737:chemistry; D011453:Prostaglandins / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D013127:Spinal Nerves; D013276:Stomach Ulcer / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D013438:Sulfhydryl Compounds / Q000378:metabolism
chemical_list: D000098:Acetophenones; D000700:Analgesics; D005765:Gastrointestinal Agents; D010936:Plant Extracts; D011453:Prostaglandins; D013438:Sulfhydryl Compounds; D009569:Nitric Oxide; D000431:Ethanol; D002351:Carrageenan; C031335:4-hydroxyacetophenone