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Comparison of the effects of streptokinase, t-PA and APSAC on human platelet aggregation in vitro in the absence and presence of aspirin.

Abstract：

:SK, t-PA or APSAC were incubated in human plasma (adjusted to 300,000 platelets/mm3), in vitro, for up to 90 minutes using concentrations which were equivalent to those achieved in the treatment of AMI patients. Aggregation was measured in response to ADP and collagen. SK inhibited platelet aggregation after a 60 minute incubation. t-PA was less inhibitory and significant effects were only achieved on extended incubation with a higher concentration of activator. APSAC markedly inhibited platelet aggregation in response to both ADP and collagen and the inhibition was achieved earlier than with SK. The difference in temporal response between APSAC and SK was not attributed to differences in systemic plasminogen activation. There was no influence of anti-SK antibody (IgG) on the platelet function response to APSAC or SK. Aspirin inhibited second phase aggregation induced by ADP but even in the presence of aspirin, the net inhibition of platelet aggregation was greater for APSAC than for SK. This marked effect of APSAC on platelet aggregation helps to explain the high initial patency and low re-occlusion rates seen when APSAC is administered to AMI patients.

journal_name

Thromb Res

journal_title

Thrombosis research

authors

Fears R,Ferres H,Greenwood HC

doi

10.1016/0049-3848(90)90105-l

subject

Has Abstract

pub_date

1990-11-15 00:00:00

pages

259-68

issue

4

eissn

0049-3848

issn

1879-2472

journal_volume

60

pub_type

杂志文章

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