Neutralization of heparin-related saccharides by histidine-rich glycoprotein and platelet factor 4.
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چکیده
منابع مشابه
Modulation of heparin cofactor II activity by histidine-rich glycoprotein and platelet factor 4.
Heparin cofactor II is a plasma protein that inhibits thrombin rapidly in the presence of either heparin or dermatan sulfate. We have determined the effects of two glycosaminoglycan-binding proteins, i.e., histidine-rich glycoprotein and platelet factor 4, on these reactions. Inhibition of thrombin by heparin cofactor II and heparin was completely prevented by purified histidine-rich glycoprote...
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Background Platelets contain several factors that inhibit heparin. This study was designed to assess the heparinneutralizing activity present in acute, platelet-rich arterial thrombi formed at sites of arterial injury in animals. Methods and Results Platelet-rich thrombi (n=3) were induced in pig coronary arteries by balloon catheter-mediated arterial injury. Soluble extracts were prepared from...
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Oligosaccharides of well-defined molecular size were prepared from heparin by nitrous acid depolymerization, affinity chromatography on immobilized antithrombin III (see footnote on Nomenclature) and gel chromatography on Sephadex G-50. High affinity (for antithrombin III) octa-, deca-, dodeca-, tetradeca-, hexadeca- and octadeca-saccharides were prepared, as well as oligosaccharides of larger ...
متن کاملRegulation of complement functional efficiency by histidine-rich glycoprotein.
The modulation of complement functional efficiency by serum histidine-rich glycoprotein (HRG) was investigated. Addition of exogenous HRG to prewarmed diluted serum, followed immediately by sensitized sheep erythrocytes (EA), resulted in enhanced hemolysis. However, when HRG was incubated with diluted serum for 10 minutes at 37 degrees C, inhibition of hemolysis occurred. The biphasic modulatio...
متن کاملHistidine-rich glycoprotein inhibits the antiproliferative effect of heparin on smooth muscle cells
Histidine-rich glycoprotein (HRGP), an alpha-glycoprotein in human plasma that is also present in platelets and macrophages, binds heparin with high affinity and neutralizes its anticoagulant activity. We now report that HRGP specifically inhibits the antiproliferative effect of heparin on arterial smooth muscle cells while other heparinoid-binding proteins do not influence mitogenesis. The mul...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1986
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)35610-7