The redistribution of granulocytes following E. coli endotoxin induced sepsis.

Abstract:

:Infusion of endotoxin elicits granulocytopenia followed by increased numbers of granulocytes in peripheral blood. The purpose of this study was to investigate the redistribution and sequestration of granulocytes in the tissues following E. coli endotoxin induced sepsis. From 16 rabbits granulocytes were isolated, labelled with Indium and reinjected intravenously. Eight rabbits received an infusion of E. coli endotoxin 2 micrograms kg-1 while eight received isotonic saline. The redistribution of granulocytes was imaged with a gamma camera and calculated with a connected computer before and 2 and 6 hours after infusion of endotoxin or saline. Serum cortisol and interleukin-1 beta were measured. In another seven rabbits, respiratory burst activity and degranulation of granulocytes were measured prior to and from 5 min to 6 hours after infusion of E. coli endotoxin 2 micrograms kg-1 BW. Following infusion of endotoxin, the number of granulocytes in peripheral blood decreased from 2.44 to 0.064 x 10 l-1 two hours later. Within 5 min after infusion the overall oxidative burst of the peripheral blood granulocytes was increased and the granularity had decreased. Serum cortisol and interleukin-1 beta increased significantly. The radioactivity of labelled cells in the bone marrow and spleen decreased to 83.1% and 91.6% of initial values. At the same time there was a transient sequestration of labelled granulocytes in the lungs reaching 117.6% of initial values. The radioactivity of the liver increased continuously to 118.4%. The results indicate that endotoxin induces an efflux in activated granulocytes from peripheral blood, bone marrow and spleen to the lungs and liver.(ABSTRACT TRUNCATED AT 250 WORDS)

authors

Toft P,Lillevang ST,Tønnesen E,Nielsen CH,Rasmussen JW

doi

10.1111/j.1399-6576.1994.tb04017.x

subject

Has Abstract

pub_date

1994-11-01 00:00:00

pages

852-7

issue

8

eissn

0001-5172

issn

1399-6576

journal_volume

38

pub_type

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