期刊
EUROPEAN JOURNAL OF PHARMACOLOGY
卷 592, 期 1-3, 页码 128-132出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ejphar.2008.06.102
关键词
adhesion; inflammation; platelet; P-selectin
资金
- Swedish Heart and Lung Foundation
- Swedish Society of Medicine
- Vascular Wall Program (Lund Medical Faculty)
- Swedish Medical Research Council (2006-4889)
- Crafoord Foundation
- Einar and Inga Nilsson Foundation
- Greta and Johan Kock Foundation
- Froken Agnes Nilsson Foundation
- Magnus Bergvall Foundation
- Mossfelt Foundation
- Nanna Svartz Foundation
- MAS Cancer Foundation
- Lund University
Platelets constitute a key role in vascular injuries, however, the detailed mechanisms behind platelet-endothelial cell and platelet-leukocyte interactions in the femoral artery are not yet fully elucidated. We used intravital fluorescence microscopy of the femoral artery in C57BL/6 mice to study primary and secondary capture of platelets onto endothelial cells as well as onto adherent platelets and leukocytes in vivo. By use of monoclonal antibodies. the role of P-selectin and P-selectin glycoprotein ligand 1 (PSGL-1) in these adhesive interactions in mice exposed to endotoxin was determined. Intravenous injection of endotoxin significantly increased gene expression of P-selectin as well as platelet tethering, rolling and adhesion in the femoral artery. Pretreatment with the anti-PSGL-1 antibody decreased platelet tethering by 85%, platelet rolling by 88% and platelet adhesion by 96%. Immunoneutralization of P-selectin reduced platelet tethering by 91%, platelet rolling by 98%, and platelet adhesion by 97%. in addition, inhibition of P-selectin and PSGL-1 completely abolished secondary capture of platelets onto adherent platelets and leukocytes. Our data show that P-selectin and PSGL-I mediate early interactions between platelets and other cells, including endothelial cells and leukocytes, in inflamed arteries. These novel results suggest that interference with P-selectin and PSGL-1 may be a useful target in strategies aiming to protect the vascular wall during arterial inflammation. (C) 2008 Elsevier B.V. All rights reserved.
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