Agents and Actions

, Volume 28, Issue 3, pp 256–263

In vitro effects of leukotriene B4 (LTB4) on canine PMN effector function(s)

Authors

  • D. F. Gruber
    • Armed Forces Radiobiology Research Institute
  • M. M. D'Alesandro
    • Naval Medical Research Institute Environmental Medicine Department
  • T. L. WaldenJr.
    • Armed Forces Radiobiology Research Institute
Inflammation and Immunomodulation Meeting Report

DOI: 10.1007/BF01967412

Cite this article as:
Gruber, D.F., D'Alesandro, M.M. & Walden, T.L. Agents and Actions (1989) 28: 256. doi:10.1007/BF01967412

Abstract

The canine has become an accepted research model for the examination of a number of human clinical conditions. Despite it's status as a research model, little is known regarding the peripheral effects of inflammatory mediator substances. Products of arachidonic acid metabolism (leukotrienes) are reported capable of altering leukocyte functions. Because of the emerging importance of the canine research model and leukotrienes we examined the effects of leukotriene B4 (LTB4) on severalin vitro functions of isolated canine peripheral polymorphonuclear leukocytes (PMN). Changes in forward angle light scatter properties of the cells were used as one measure of PMN activation. Other functional changes examined following LTB4 pretreatment included chemotactic capability, the electrophysiological state of the cell plasma membrane, and the metabolic oxidative response (i. e. H2O2 production). Random cellular movement of PMNs increased by 120% and 72% following preincubation with 10−7 and 10−9M LTB4, respectively. LTB4 between 10−7 and 10−13M did not significantly alter cellular resting membrane potential. Between 10−7 and 10−9M LTB4 elicited significant levels of cellular H2O2 production. Although significant, H2O2 production was <40% that induced by phorbol myristate acetate (PMA). In numerous respects, caninein vitro PMN responses parallel previous reports of human cell function(s) in the presence of inflammatory mediators and may represent an attractive alternative for investigation of PMN dysfunctions.

Abbreviations

PMN

polymorphonuclear leukocyte

PMA

phorbol myristate acetate

FBS

fetal bovine serum

PBS

phosphate buffered saline

HPLC

high performance liquid chromatography

BRM

baseline random migration

HBSS

Hank's balanced salt solution

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Copyright information

© Birkhäuser Verlag 1989