Human peripheral blood mononuclear cells require factor X and platelets for expression of prothrombinase activity in response to bacterial lipopolysaccharide.

Abstract:

:We investigated whether human peripheral blood mononuclear cells (PBMC) express prothrombinase following stimulation with bacterial lipopolysaccharide (LPS). LPS-stimulated PBMC devoid of contaminating platelets failed to activate prothrombin directly. Addition of platelets did not result in expression of prothrombinase in the absence of factor X whereas the combination of platelets and factor X resulted in strong prothrombinase activity on LPS-activated cells. The induced prothrombinase was dependent on tissue factor, as the activity was completely inhibited by an anti-tissue factor antibody. Our data suggest that platelet/monocyte cooperation is important in the generation of prothrombinase activity in response to endotoxin.

journal_name

Ann Hematol

journal_title

Annals of hematology

authors

Pejler G,Geczy CL

doi

10.1007/s002770100288

subject

Has Abstract

pub_date

2001-05-01 00:00:00

pages

278-83

issue

5

eissn

0939-5555

issn

1432-0584

journal_volume

80

pub_type

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