Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/198514
Type: Artigo de periódico
Title: Phenylpyrazolone Derivatives Inhibit Gastric Emptying In Rats By A Capsaicin-sensitive Afferent Pathway.
Author: Vinagre, A M
Collares, E F
Abstract: Dipyrone (Dp), 4-aminoantipyrine (AA) and antipyrine (At) administered iv and Dp administered icv delay gastric emptying (GE) in rats. The participation of capsaicin (Cps)-sensitive afferent fibers in this phenomenon was evaluated. Male Wistar rats were pretreated sc with Cps (50 mg/kg) or vehicle between the first and second day of life and both groups were submitted to the eye-wiping test. GE was determined in these animals at the age of 8/9 weeks (weight: 200-300 g). Ten minutes before the study, the animals of both groups were treated iv with Dp, AA or At (240 micromol/kg), or saline; or treated icv with Dp (4 micromol/animal) or saline. GE was determined 10 min after treatment by measuring % gastric retention (GR) of saline labeled with phenol red 10 min after orogastric administration. Percent GR (mean +/- SEM, N = 8) in animals pretreated with Cps and treated with Dp, AA or At (35.8 +/- 3.2, 35.4 +/- 2.2, and 35.6 +/- 2%, respectively) did not differ from the GR of saline-treated animals pretreated with vehicle (36.8 +/- 2.8%) and was significantly lower than in animals pretreated with vehicle and treated with the drugs (52.1 +/- 2.8, 66.2 +/- 4, and 55.8 +/- 3%, respectively). The effect of icv administration of Dp (N = 6) was not modified by pretreatment with Cps (63.3 +/- 5.7%) compared to Dp-treated animals pretreated with vehicle (62.3 +/- 2.4%). The results suggest the participation of capsaicin-sensitive afferent fibers in the delayed GE induced by iv administration of Dp, AA and At, but not of icv Dp.
Subject: Afferent Pathways
Ampyrone
Animals
Animals, Newborn
Anti-inflammatory Agents, Non-steroidal
Antipyrine
Capsaicin
Dipyrone
Dose-response Relationship, Drug
Gastric Emptying
Male
Rats
Rats, Wistar
Citation: Brazilian Journal Of Medical And Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas / Sociedade Brasileira De Biofísica ... [et Al.]. v. 42, n. 11, p. 1086-9, 2009-Nov.
Rights: aberto
Identifier DOI: 10.1590/S0100-879X2009001100014
Address: http://www.ncbi.nlm.nih.gov/pubmed/19855904
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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