Formation of tissue factor activity following incubation of recombinant human tissue factor apoprotein with plasma lipoproteins.

Abstract:

:Incubation of recombinant human tissue factor apoprotein (Apo-TF) with human plasma decreased the recalcified clotting time of this plasma in a time-and dose-dependent manner suggesting relipidation of the Apo-TF by plasma lipoproteins. Incubation of Apo-TF with purified preparations of human very low density, low density and high density lipoproteins resulted in tissue factor activity in a clotting assay. The order of effectiveness was VLDL greater than LDL much greater than HDL. Tissue factor activity generated by incubation of a fixed amount of Apo-TF with plasma lipoproteins was lipoprotein concentration-dependent and saturable. The association of Apo-TF with lipoprotein particles was supported by gel filtration studies in which 125I-Apo-TF coeluted with the plasma lipoprotein in the void volume of a Superose 6 column in the presence and absence of calcium ions. In addition, void-volume Apo-TF-lipoprotein fractions exhibited tissue factor activity. These results suggest that the factor VIII-bypassing activity of bovine Apo-TF observed in a canine hemophilic model may be due, in part, to its association with plasma lipoproteins and expression of functional tissue factor activity.

journal_name

Thromb Res

journal_title

Thrombosis research

authors

Sakai T,Kisiel W

doi

10.1016/0049-3848(90)90182-c

subject

Has Abstract

pub_date

1990-11-01 00:00:00

pages

213-22

issue

3

eissn

0049-3848

issn

1879-2472

pii

0049-3848(90)90182-C

journal_volume

60

pub_type

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