منابع مشابه
Human Plasma Alpha 2-macroglobulin
Activation of plasma kallikrein arginine esterase activity by kaolin resulted in peak activity at 1 min of incubation and a 50% reduction in activity at 5 min in normal plasma, and 30% reduction in the plasma of patients with hereditary angioneurotic edema who lacked the C1 inactivator. The peak esterolytic activity was inhibited by soybean trypsin inhibitor whereas the 5 min activity was resis...
متن کاملSpecific covalent binding of platelet-derived growth factor to human plasma alpha 2-macroglobulin.
Attempts to measure the platelet-derived growth factor (PDGF) in human plasma resulted in the discovery of a specific plasma binding protein. The 125I-labeled PDGF (125I-PDGF)-plasma binding protein complex retained mitogenic activity but lost reactivity against rabbit anti-PDGF antiserum. Copurification of the plasma binding protein and alpha 2-macroglobulin (alpha 2M) in human plasma, the for...
متن کاملAlpha-2-Macroglobulin: A Physiological Guardian
Alpha macroglobulins are large glycoproteins which are present in the body fluids of both invertebrates and vertebrates. Alpha-2macroglobulin (a2M), a key member of alpha macroglobulin superfamily, is a high-molecular weight homotetrameric glycoprotein. a2Mhasmany diversified and complex functions, but it is primarily known by its ability to inhibit a broad spectrumof proteaseswithout the direc...
متن کاملAlpha 2 macroglobulin state in acute pancreatitis. Raised values of alpha 2 macroglobulin-protease complexes in severe and mild attacks.
Plasma values of C reactive protein, alpha 1 proteinase inhibitor, alpha 2 macroglobulin, and complexed alpha 2 macroglobulin have been determined in serial samples from 27 patients with acute pancreatitis. Complexed alpha 2 macroglobulin was measured by a novel enzyme linked immunosorbent assay with a monoclonal antibody specific for the complexed form. Patients with severe illness had lower c...
متن کاملAlpha-2-macroglobulin inhibits the anticoagulant action of activated protein C in cord and adult plasma.
Healthy newborns have a very low risk of thrombosis. It has been suggested that this is partly due to the anticoagulant effect of alpha-2-macroglobulin (a2-M). This broad-spectrum protease binding glycoprotein is physiologically elevated in newborns over adult values and has been shown to complex generated alpha-thrombin. In our present study, we point out that a2-M also acts as a procoagulant ...
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ژورنال
عنوان ژورنال: Journal of Experimental Medicine
سال: 1970
ISSN: 1540-9538,0022-1007
DOI: 10.1084/jem.132.2.329