THE ACTIVITY OF PLASMINOGEN-ACTIVATOR INHIBITOR-1 (PAI-1) OF HUMAN PLATELET

被引:35
|
作者
BOOTH, NA [1 ]
CROLL, A [1 ]
BENNETT, B [1 ]
机构
[1] UNIV ABERDEEN,DEPT MED & THERAPEUT,ABERDEEN AB9 1AS,SCOTLAND
关键词
PAI-1; Plasminogen activator inhibitor; Platelets;
D O I
10.1016/0268-9499(90)90391-V
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
We have previously shown that platelets account for 93% of circulating PAI-1 antigen but for only half the PAI activity, suggesting that platelet PAI-1 is less active than plasma PAI-1. Here we show, both by an assay for the PAI-1 that is capable of forming a complex with t-PA and by a chromogenic assay for PAI activity, that human platelet PAI-1 is 3.5 ± 1.1% active. Human PAI-1, purified either from platelets or endothelial cells, was reactivated by 4M guanidine to a final specific activity of about 300,000 U/mg PAI-1. © 1990.
引用
收藏
页码:138 / 140
页数:3
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