Intercellular transport through a partially denuded arterial endothelial monolayer. Effect of platelets and PGI2

Involvement of von Willebrand factor and PGI2 in platelet binding to a partially denuded endothelial monolayer

Platelet binding to an endothelial monolayer was examined after denudation. The binding increased for up to 10 min and thereafter declined gradually. Antibodies against von Willebrand factor (vWF) inhibited the binding. Production of prostacyclin (PGI2) occurred 10 min after endothelial denudation. This study suggests that vWF is involved in the binding during the first 10 min and that PGI2 suppresses the binding thereafter.

Accumulation of cholesteryl ester in atherosclerotic lesions

This article reviews aspects of the molecular pathology of cholesteryl ester accumulation in atherosclerotic lesions. 1. Transcytosis of lipoproteins through a cultured endothelial monolayer. 2. Effects of platelets and PGI2 on intercellular transport of endothelial cells. 3. Transformation of macrophages to foam cells. 4. Cholesteryl ester deposition in the extracellular space of atherosclerotic lesions. The development and use of novel monoclonal antibodies recognizing atherosclerotic lesions and peroxidized lipoproteins prepared from then are also discussed.