PMID: 8595929Dec 1, 1995Paper

A comparison of the effects of signal transduction inhibitors on oxidative burst and degranulation in IL-I beta stimulated bovine neutrophils

Inflammation
P W Yu, C J Czuprynski

Abstract

There is little information available on IL-1 mediated signal transduction in neutrophils from species other than humans. In this study, signal transduction pathway inhibitors were used to compare signaling pathways for the oxidative burst and degranulation in bovine neutrophils stimulated with rBoIL-1 beta. Protein kinase C inhibitors (staurosporine and chelerythine), DL-propranolol, pertussis toxin (PT), genistein and verapamil significantly inhibited rBoIL-1 beta (10 ng/ml) stimulated luminol-dependent chemiluminescence (LDCL) in a dose-dependent manner, while indomethacin and zileuton had no effect. Propranolol significantly decreased both primary and secondary granule release in response to rBoIL-1 beta. Staurosporine enhanced secondary but not primary granule release, and PT increased primary and secondary granule release. In addition, propranolol inhibited the shape change induced by rBoIL-1 beta and zymosan-activated serum, whereas PT markedly decreased the response induced by zymosan-activated serum, but not rBoIL-1 beta. These findings suggest that rBoIL-1 beta stimulation of the oxidative burst, degranulation, and shape change of bovine neutrophils are mediated through distinct signal transduction pathways.

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