HEMOGLOBIN INHIBITION OF FIBRIN POLYMERIZATION AND CLOTTING

被引:5
作者
BREZNIAK, DV
MOON, DG
BEAVER, JA
FENTON, JW
机构
[1] NEW YORK STATE DEPT HLTH,WADSWORTH CTR LABS & RES,ALBANY,NY 12201
[2] ALBANY MED COLL,ALBANY MED COLL,DEPT PHYSIOL & CELL BIOL,ALBANY,NY 12208
[3] ALBANY MED COLL,ALBANY MED COLL,DEPT BIOCHEM & MOLEC BIOL,ALBANY,NY 12208
[4] ALBANY MED COLL,ALBANY COLL PHARM,DEPT PHARM PRACTICE,ALBANY,NY 12208
[5] ALBANY MED COLL,ALBANY COLL PHARM,DEPT BIOL,ALBANY,NY 12208
关键词
FIBRIN POLYMERIZATION; HEMOGLOBIN; THROMBIN;
D O I
10.1097/00001721-199402000-00016
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Clotting of human plasma by human alpha-thrombin was prolonged in the presence of haemoglobin as was human and bovine fibrinogen. Specifically, the clot time doubled for human plasma, human fibrinogen and bovine fibrinogen at 483, 233, and 116 mu M haemoglobin, respectively. Fibrinopeptide A release was not inhibited at concentrations in similar to 16000 molar excess compared with alpha-thrombin. Turbidometric analysis of fibrin polymerization showed a lengthening of the lag phase as well as the fibrin assembly process in the presence of haemoglobin. These findings suggested that neither fibrinogen recognition nor catalytic efficiency of thrombin was affected, implying that haemoglobin interferes with fibrin polymerization. Since human blood contains sufficient haemoglobin in erythrocytes to generate concentrations of up to 2.3 mM upon cell lysis, and haemoglobin concentrations of 0.16-0.48 mM caused 1.25 to two times longer clotting times in fresh human plasma, respectively, haemoglobin may act to modulate clot formation under conditions of haemolysis.
引用
收藏
页码:139 / 143
页数:5
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