Endothelial cells produce a substance that inhibits contact activation of coagulation by blocking the activation of Hageman factor
| Autor: | Virginia H. Donaldson, Jozef Kleniewski |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Umbilical Veins
medicine.medical_specialty Endothelium Factor XIIa Umbilical vein hemic and lymphatic diseases Internal medicine medicine Humans Cells Cultured Factor XII Kininogen Multidisciplinary Kininogens Chemistry Prekallikrein Molecular biology Culture Media Endothelial stem cell Kinetics Endocrinology medicine.anatomical_structure Coagulation Electrophoresis Polyacrylamide Gel Endothelium Vascular Research Article |
| Zdroj: | Proceedings of the National Academy of Sciences. 90:198-202 |
| ISSN: | 1091-6490 0027-8424 |
| DOI: | 10.1073/pnas.90.1.198 |
| Popis: | Human umbilical vein endothelial cells (HUVECs) produce a property that impairs the generation of coagulant and amidolytic activity initiated when normal human plasma is exposed to glass. This inhibitory property blocks the adsorption of Hageman factor (factor XII) to glass, thereby preventing the activation of Hageman factor, but does not impair the coagulant or amidolytic activity of already activated Hageman factor (factor XIIa). This property in HUVEC lysates could be neutralized by a purified preparation of Hageman factor but not by purified prekallikrein or high molecular mass kininogen. A partially purified inhibitory fraction from cell lysates exhibited a single homogeneous band in SDS/PAGE of approximately 22.5 kDa. Inhibitory activity was also found in concentrates of conditioned media from HUVECs, which also impaired the binding of Hageman factor to a surface; it may not be identical with that found in cell lysates. |
| Databáze: | OpenAIRE |
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