Proteinase-Activated Receptor-4 Potential Proinflammatory Role for Leukocyte Rolling and Adherence: A Characterization of Thrombin-Induced

Potential Proinflammatory Role for Leukocyte Rolling and Adherence: A Characterization of Thrombin-Induced

Proteinase-activated receptor-2-activating peptides induce leukocyte rolling, adhesion, and extravasation in vivo.

Proteinase-activated receptor 2 (PAR2) has been suggested to play a role in inflammatory reactions. Because leukocyte-endothelial cell interactions are critical events during inflammatory reactions, and because PAR2 is expressed both on endothelium and leukocytes, we have examined the effects of PAR2-activating peptides (PAR2-APs) on leukocyte rolling and adhesion in mesenteric venules and on l...

Proteinase-activated receptor-1 mediates elastase-induced apoptosis of human lung epithelial cells.

Apoptosis of distal lung epithelial cells plays a pivotal role in the pathogenesis of acute lung injury. In this context, proteinases, either circulating or leukocyte-derived, may contribute to epithelial apoptosis and lung injury. We hypothesized that apoptosis of lung epithelial cells induced by leukocyte elastase is mediated via the proteinase activated receptor (PAR)-1. Leukocyte elastase, ...

Vascular endothelial growth factor attenuates leukocyte-endothelium interaction during acute endothelial dysfunction: essential role of endothelium-derived nitric oxide.

Vascular endothelial growth factor (VEGF) is an endothelium-specific secreted protein that induces vasodilation and increases endothelial release of nitric oxide (NO). NO is also reported to modulate leukocyte-endothelium interaction. Therefore, we hypothesized that VEGF might inhibit leukocyte-endothelium interaction via increased release of NO from the vascular endothelium. We used intravital...

The role of chemokines and chemokine receptors in mycosis fungoides

Background: Chemokines are a family of cytokines initially characterized by their capacity to induce chemotaxis, or directed leukocyte migrations. These receptors are activated by chemotactic cytokines called chemokines. Interactions between chemokines and chemokine receptors also are involved in tumorigenesis, migration and invasion of lymphoma cells.Methods: An English literature search...