Lipoprotein lipase-mediated lipolysis of very low density lipoproteins increases monocyte adhesion to aortic endothelial cells.

Abstract:

:Lipoprotein lipase (LPL) bound to vascular endothelial cells hydrolyses triglycerides in plasma lipoproteins. To explore the role of LPL in atherogenesis, the effect of LPL-mediated lipolysis of very low density lipoproteins (VLDL) on monocyte adhesion to endothelial cells was examined. Adhesion of U937 monocytes to porcine aortic endothelial cells that were incubated with VLDL and purified bovine milk LPL was markedly higher than endothelial cells that were incubated with VLDL alone. The increase in monocyte adhesion obtained with VLDL was dependent on the concentration of the lipoprotein, monocyte dose and time of incubation. The increase in adhesion correlated with generation of free fatty acids from the hydrolysis of triglycerides in VLDL by LPL. Furthermore, direct addition of oleic acid to endothelial cells also increased adhesion of monocytes. We postulate that LPL-derived lipolytic products increase monocyte adhesion to vascular endothelium and thereby promote atherogenesis.

authors

Saxena U,Kulkarni NM,Ferguson E,Newton RS

doi

10.1016/0006-291x(92)90267-o

subject

Has Abstract

pub_date

1992-12-30 00:00:00

pages

1653-8

issue

3

eissn

0006-291X

issn

1090-2104

pii

0006-291X(92)90267-O

journal_volume

189

pub_type

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