Expression of VLA-4 on eosinophils decreases in patients with eosinophilia.

Abstract:

BACKGROUND:It is assumed that the very late antigen-4 (VLA-4) plays a key role in selective migration and accumulation of eosinophils to the allergic inflammatory focus. The regulatory mechanism for VLA-4 expression is poorly understood, as is its relationship between other adhesion molecules. OBJECTIVE:The aim of the study was to elucidate the relationship between VLA-4 expression and the activation of eosinophils. METHODS:The surface expression of VLA-4, Mac-1, ICAM-1, CD4, CD25, CD69, CD89, IL-5 receptor and GM-CSF receptor on eosinophils isolated from the peripheral blood of 15 patients with eosinophilia and 16 healthy volunteers was measured. RESULTS:The surface expression of VLA-4 presented in mean fluorescent intensity by flow-cytometric analysis showed a significant decrease in the patients with eosinophilia (>700 eosinophils/microl) compared to that of the subjects without eosinophilia. On the other hand, the surface expression of Mac-1 was significantly increased in the patients with eosinophilia. There was an inverse correlation between the expression of VLA-4 and that of Mac-1 (r = -0.81) on the eosinophils obtained from the patients with eosinophilia. CONCLUSION:The changes on the surface expressions of Mac-1 and VLA-4 may be indicating the activation of eosinophils in the patients with eosinophilia and may contribute to their migration to the allergic inflammatory focus.

authors

Kayaba H,Yamada Y,Cui CH,Saito N,Honda K,Kobayashi Y,Urayama O,Chihara J

doi

10.1159/000053850

keywords:

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

33-7

eissn

1018-2438

issn

1423-0097

pii

53850

journal_volume

125 Suppl 1

pub_type

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