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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Masaki, T. Sawamura, T. Kakutani, M. |
| Description | Author Affiliation: Kakutani M ( Department of Bioscience, National Cardiovascular Center Research Institute, Suita, Osaka 565-8565, Japan.); |
| Abstract | One crucial role of endothelium is to keep the innermost surface of a blood vessel antithrombotic. However, the endothelium also expresses prothrombotic molecules in response to various stimuli. The balance between the antithrombotic and prothrombotic nature of the endothelium is lost under certain conditions. During atherosclerosis, the attachment of platelets to the vessel surface has been suggested to promote the proliferation of smooth muscle cells and intimal thickening as well as to affect the prognosis of the disease directly through myocardial infarction and stroke. Dysfunctional endothelium, which is often a result of the action of oxidized low-density lipoprotein (OxLDL), tends to be more procoagulant and adhesive to platelets. Herein, we sought the possibility that the endothelial lectin-like OxLDL receptor-1 (LOX-1) is involved in the platelet-endothelium interaction and hence directly in endothelial dysfunction. LOX-1 indeed worked as an adhesion molecule for platelets. The binding of platelets was inhibited by a phosphatidylserine-binding protein, annexin V, and enhanced by agonists for platelets. These results suggest that negative phospholipids exposed on activation on the surface of platelets are the epitopes for LOX-1. Notably, the binding of platelets to LOX-1 enhanced the release of endothelin-1 from endothelial cells, supporting the induction of endothelial dysfunction, which would, in turn, promote the atherogenic process. LOX-1 may initiate and promote atherosclerosis, binding not only OxLDL but also platelets. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 1 |
| Volume Number | 97 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2000-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Blood Platelets Metabolism Endothelium, Vascular Lectins Receptors, LDL Animals Annexin A5 Pharmacology Antibodies Arteriosclerosis CHO Cells Collagen Cricetinae Endothelin-1 Pathology Lipoproteins, LDL Phagocytosis Platelet Activation Drug Effects Receptors, Oxidized LDL Scavenger Receptors, Class E Thrombin Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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