Enhancement of monocyte adhesion to endothelial cells by oxidatively modified low-density lipoprotein is mediated by activation of CD11b.

Abstract:

:Treatment of human peripheral blood monocytes with oxidized (oxLDL), minimally modified low-density lipoprotein (mmLDL) or lysophosphatidylcholine (LPC) for 24h was associated with macrophage-like differentiation, as assessed by morphology/CD14 expression. Suppression of these effects by staurosporin (STS) indicated the dependence on protein kinase C (PKC) activation. OxLDL and mmLDL increased monocyte adhesion to human umbilical vein endothelial cells 2-fold. Enhancement of adhesion was prevented by an anti-CD11b mAb, demonstrating the involvement of CD11b. While LPC increased monocyte adhesion, inhibition of PKC by STS reversed enhancement of adhesion by oxLDL, showing mediation by LPC-induced PKC activation. OxLDL, mmLDL or LPC increased CD11b expression and stimulated a distinct peak in fluorescence intensity, suggesting that CD11b activation was crucial for enhanced monocyte adhesion.

authors

Weber C,Erl W,Weber PC

doi

10.1006/bbrc.1995.1088

subject

Has Abstract

pub_date

1995-01-17 00:00:00

pages

621-8

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(85)71088-1

journal_volume

206

pub_type

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