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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Singel, D. Loscalzo, J. Simon, D. I. Francis, S. Stamler, J. S. Jaraki, O. Osborne, J. A. Mullins, M. |
| Description | Author Affiliation: Stamler JS ( Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.); |
| Abstract | Tissue-type plasminogen activator (t-PA) reacts upon exposure to endothelium-derived relaxing factor (EDRF) by way of the enzyme's single free sulfhydryl (Cys-83) to form a stable S-nitrosothiol protein adduct. S-nitrosylation endows t-PA with potent vasodilatory and antiplatelet properties that are accompanied by elevations in intracellular cyclic GMP analogous to those induced by low molecular weight (e.g., S-nitroso amino acid) S-nitrosothiols. Moreover, this chemical modification does not adversely affect the catalytic efficiency of t-PA, the fibrin stimulation of this activity, the binding of t-PA to fibrinogen, or the interaction of the enzyme with its physiologic serine protease inhibitor, plasminogen-activator inhibitor type I. The coupling of vasodilatory, antiplatelet, and fibrinolytic properties in one molecule makes the S-nitrosylated t-PA a unique molecular species and may provide insight into the mechanisms by which the endothelium maintains vessel patency. These data also suggest a pharmacologic approach to treatment of thromboocclusive disorders. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 17 |
| Volume Number | 89 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1992-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Nitroso Compounds Chemistry Tissue Plasminogen Activator Vasodilator Agents Animals Cells, Cultured Cyclic GMP Metabolism Fibrin Fibrinogen In Vitro Techniques Kinetics Pharmacology Platelet Aggregation Drug Effects Platelet Aggregation Inhibitors Structure-Activity Relationship Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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