Liver blood flow as a major determinant of the clearance of recombinant human tissue-type plasminogen activator.

Abstract:

:The influence of changes in liver blood flow on the clearance of rt-PA was studied both in healthy subjects and in a perfused rat liver model. Liver blood flow in healthy subjects was documented indirectly by the clearance of indocyanine green (ICG). Exercise reduced liver blood flow on average by 57% with a 95% confidence interval (95% CI) ranging from 51% to 62% (n = 5) and increased plasma levels of rt-PA activity (after an i.v. infusion of 18 mg of rt-PA over 120 min) by 119% (95% CI, 58%-203%) and rt-PA antigen by 91% (95% CI, 30%-140%). In the perfused rat liver model it was shown that halving or doubling of the physiological flow rate of a perfusate, containing rt-PA caused a proportional change in the clearance of rt-PA, while the extraction of rt-PA by the liver remained similar. In conclusion, liver blood flow is a major determinant of the clearance of rt-PA. This may have important implications for dosage of rt-PA in patients with myocardial infarction.

journal_name

Thromb Haemost

authors

de Boer A,Kluft C,Kroon JM,Kasper FJ,Schoemaker HC,Pruis J,Breimer DD,Soons PA,Emeis JJ,Cohen AF

keywords:

subject

Has Abstract

pub_date

1992-01-23 00:00:00

pages

83-7

issue

1

eissn

0340-6245

issn

2567-689X

journal_volume

67

pub_type

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