Novel clearance mechanisms of platelets

The Clearance Mechanism of Chilled Blood Platelets

Platelet transfusion is a very common lifesaving medical procedure. Not widely known is the fact that platelets, unlike other blood cells, rapidly leave the circulation if refrigerated prior to transfusion. This peculiarity requires blood services to store platelets at room temperature, limiting platelet supplies for clinical needs. Here, we describe the mechanism of this clearance system, a lo...

Mechanisms of pulmonary edema clearance.

The mechanisms of pulmonary edema resolution are different from those regulating edema formation. Absorption of excess alveolar fluid is an active process that involves vectorial transport of Na+ out of alveolar air spaces with water following the Na+ osmotic gradient. Active Na+ transport across the alveolar epithelium is regulated via apical Na+ and chloride channels and basolateral Na-K-ATPa...

Mechanisms of Lung Edema Clearance

Cell adhesion mechanisms in platelets.

At sites of vascular injury, platelets come into contact with the subendothelial extracellular matrix which triggers their activation and the formation of a hemostatic plug. This process is crucial for normal hemostasis, but may also lead to pathological thrombus formation causing diseases such as myocardial infarction or stroke. The initial capture of flowing platelets is mediated by the inter...

PLATELETS AND THROMBOPOIESIS Lactadherin and clearance of platelet-derived microvesicles

The transbilayer movement of phosphatidylserine from the inner to the outer leaflet of the membrane bilayer during platelet activation is associated with the release of procoagulant phosphatidylserine-rich small membrane vesicles called platelet-derived microvesicles. We tested the effect of lactadherin, which promotes the phagocytosis of phosphatidylserineexpressing lymphocytes and red blood c...