Effect of particle size on alumina-induced production of reactive oxygen metabolites by human leukocytes.

Abstract:

:To assess the role of crystal size in the biologic response, we quantitated the generation of reactive oxygen metabolites in human polymorphonuclear leukocytes (PMNs) or mononuclear leukocytes (MNs) with a chemiluminescence assay using 6 alpha-alumina preparations with average diameters of 0.6, 0.8, 3.2, 7.5, 28 and 68 microns on the basis of equal weights (1 mg/ml), and also on the basis of surface areas (100 cm2/ml). On an equal weight alumina particles induced PMN chemiluminescence in the following order of magnitude: 3.2 microns > 7.5 microns, 0.8 micron > 0.6 micron > 28 microns, 68 microns. The particulates induced MN chemiluminescence: 3.2 microns > 0.8 micron > 0.6 micron > 7.5 microns > 28 microns, 68 microns. On the basis of identical surface areas, alumina elicited PMN chemiluminescence: 3.2 microns > 7.5 microns, 0.8 micron > 0.6 micron, 28 microns, 68 microns. The particulates induced MN chemiluminescence: 3.2 microns > 0.8 micron > 0.6 micron, 7.5 microns > 28 microns, 68 microns. The maximal effect of particle size on the alumina-induced production of reactive oxygen metabolites by human leukocytes was seen at around 3 microns.

journal_name

Scand J Rheumatol

authors

Nagase M,Nishiya H,Takeuchi H

doi

10.3109/03009749509099293

subject

Has Abstract

pub_date

1995-01-01 00:00:00

pages

102-7

issue

2

eissn

0300-9742

issn

1502-7732

journal_volume

24

pub_type

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