Indomethacin, (-)-terbutaline (?2 agonist), and (+)-terbutaline in acute inflammation induced by repeated ischemia in hamster cheek pouch
- 1 June 1985
- journal article
- research article
- Published by Springer Science and Business Media LLC in Inflammation
- Vol. 9 (2), 173-181
- https://doi.org/10.1007/bf00917589
Abstract
A mild and controlled acute inflammatory reaction in hamster cheek pouch was created without any exogenous, but rather by locally activated and liberated, mediators. A pressure of 60 mm Kg was applied to part of the everted cheek pouch eight times with a 10-min recovery period in between. The microvascular response was followed by intravital microscopy and the permeability changes were monitored with intravital fluoroscopy and intravenous FITC dextran (mol wt 150,000). The number of extravasated polymorphnuclear leukocytes (PMNLs) was calculated by a new, whole tissue, histological technique. In three experimental groups (-)-terbutaline (β2-receptor agonist) 0.05 mg/100 g body wt., (+)-terbutaline 0.05 mg/100 g body wt., and indomethacin 2 mg/100 g body wt. was given intravenously before pressure was applied. A fourth group, with no drug given, served as control. There was a rapid increase in the number of FITC dextran leakages and extravasated PMNLs in the control group. Indomethacin almost completely inhibited FITC dextran permeability and extravasation of PMNLs. The β2 agonist markedly diminished the number of FITC dextran leakages for 75 min. The number of extravasated PMNLs was also reduced. Treatment with (+)-terbutaline, which is supposed to have no β2-receptor effect, gave a slight reduction in number of FITC dextran leakages and almost a complete inhibition of PMNL extravasation. Thus we conclude that indomethacin is a very potent antiinflammatory agent even in the early phase of inflammation. (−)-Terbutaline diminished the inflammatory response, probably by preventing endothelial gap formation. (+)-Terbutaline prevented PMNL extravasation either by interaction with the PMNL itself or with the endothelium.This publication has 22 references indexed in Scilit:
- Suppression of acute and chronic inflammation by orally administered prostaglandinsArthritis & Rheumatism, 1981
- Simultaneous measurements of macromolecular leakage and arteriolar blood flow as altered by PGE1 and β2-receptor stimulant in the hamster cheek pouchMicrovascular Research, 1979
- Effects of histamine and increased venous pressure on transmicrovascular protein transportMicrovascular Research, 1979
- Bradykinin and prostaglandin E1, E2 and F2α-induced macromolecular leakage in the hamster cheek pouchProstaglandins and Medicine, 1978
- Role of prostaglandins and histamine in reactive hyperemia: In-vivo studies on single mesenteric arteriolesProstaglandins and Medicine, 1978
- The Hamster Cheek Pouch Preparation as a Model for Studies of Macromolecular Permeability of the MicrovasculatureUpsala Journal of Medical Sciences, 1978
- Role of prostaglandin-mediated vasodilatation in inflammationNature, 1977
- Pressure-Induced IschemiaEuropean Surgical Research, 1977
- Prostaglandins as Potentiators of Increased Vascular Permeability in InflammationNature, 1973
- STUDIES ON INFLAMMATIONThe Journal of cell biology, 1961