Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Involvement of kinins, mast cells and sensory neurons in the plasma exudation and paw oedema induced by staphylococcal enterotoxin B in the mouse
Author: Linardi, A
Costa, SKP
da Silva, GR
Antunes, E
Abstract: Intraplantar injection of staphylococcal enterotoxin B induces long-lasting oedema mediated by both cyclooxygenase and lipoxygenase products as well as by neuropeptides from sensory nerves. This study was undertaken to further clarify the role of peripheral primary afferent sensory nerves in staphylococcal enterotoxin B (25 mu g/paw)-induced plasma extravasation and oedema formation. The tachykinin NK2 receptor antagonist (S)-1-[2-[3-(3,4-dichlorophenyl)-1 (3-isopropoxyphenylacetyl)piperidin-3-y] ethyl]4-phenyl-1 azoniabicyclo [2.2.2]octane cloride (SR140333; 120 nmol/kg, s.c. + 120 nmol/kg, i.v.) significantly inhibited plasma exudation and paw oedema evoked by staphylococcal enterotoxin B. The tachykinin NK, receptor antagonist (S)-N-methyl-N[4-(4-acetylamino-4-phenyl piperidino)-2-(3,4-dichlorophenyl)butyl] (SR48968) had no effect on the staphylococcal enterotoxin B-induced responses. The bradykinin B-2 receptor antagonist D-Arg-[Hyp(3),Thi(5),D-TiC7,OiC(8)]bradykinin (Hoe 140; 400 nmol/kg, i.v.) significantly reduced staphylococcal enterotoxin B-induced responses. The magnitude of the inhibition observed with Hoe 140 alone was similar to that caused by concomitant treatment of animals with SR140333 and Hoe 140, suggesting that there is a final common pathway. Additionally, SR140333 given alone reduced bradykinin (3 nmol/paw)-induced paw oedema. The vanilloid receptor antagonist N-[2-(4-chlorophenyl) ethyl]-1,3,4,5-tetrahydro-7,8-dihydroxy-2H-2-benzazepine-2-carbothioamide (capsazepine; 100 mu mol/kg) significantly reduced staphylococcal enterotoxin B-induced responses. The 5-HT receptor antagonist methysergide (10 mg/kg, i.v.) and the histamine H-1 receptor antagonist mepyramine (10 mg/kg, i.v.) produced a significant reduction in paw oedema whereas plasma exudation was reduced only by methysergide. In diabetic mice, exudation and oedema evoked by staphylococcal enterotoxin B were markedly reduced. Acute administration of insulin (20 UI/kg, s.c., 30 min before) did not restore the increased permeability induced by staphylococcal enterotoxin B. We conclude that plasma exudation and paw oedema in response to staphylococcal enterotoxin B are a consequence of a complex neurogenic response involving direct activation of vanilloid receptors on sensory nerves, release of kinins and subsequent activation of bradykinin B-2 receptors at a prejunctional level, and direct or indirect degranulation of mast cells. (C) 2000 Elsevier Science B.V. All rights reserved.
Subject: staphylococcal enterotoxin B
mast cell
neurogenic inflammation
tachykinin NK1
vanilloid receptor
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S0014-2999(00)00375-7
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000088189200020.pdf238.31 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.