Administration of G-CSF to healthy subjects: the effects on eosinophil counts and mobilization of eosinophil granule proteins.

Abstract:

:Any influence of G-CSF on eosinophils is mostly negative, although reports which have studied this relationship are few with varied results. The aim of this study was to investigate the influence of G-CSF administration to healthy subjects on eosinophils in peripheral blood. Blood eosinophil counts, serum levels of eosinophil cationic protein (ECP), eosinophil peroxidase (EPO) and eosinophil protein X (EPX), as well as cell morphology were studied. 14 healthy volunteers received 7.5 microg (n = 8) or 10 microg/kg body weight (n = 6) G-CSF daily for six consecutive days. ECP and EPX were assessed by specific RIAs and EPO by a specific FEIA. Cell morphology was examined by electron microscopy. During G-CSF administration, eosinophil counts increased from 0.22 +/- 0.04 x 10(9)/l to 0.61 +/- 0.098 x 10(9)/l (P = 0.001), serum ECP from 12.39 +/- 2.45 microg/l to 61.82 +/- 7.38 microg/l (P = 0.0014), serum EPX from 28.05 +/- 4.54 microg/l to 87.86 +/- 9.84 microg/l (P = 0.002) and serum EPO from 8.89 +/- 2.2 microg/l to 19.98 +/- 5.1 microg/l (P = 0.003). All variables returned gradually to initial values after discontinuation of G-CSF. Distinct changes in the morphology of secondary granules were observed 24 h after G-CSF administration. The granules became irregular and their matrix less electron dense. We conclude that administration of G-CSF to healthy humans increases the number of circulating eosinophils and affects the mobilization of eosinophil granule proteins.

journal_name

Br J Haematol

authors

Karawajczyk M,Höglund M,Ericsson J,Venge P

doi

10.1046/j.1365-2141.1997.d01-2045.x

subject

Has Abstract

pub_date

1997-02-01 00:00:00

pages

259-65

issue

2

eissn

0007-1048

issn

1365-2141

journal_volume

96

pub_type

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