Thromb Haemost 2000; 83(06): 868-873
DOI: 10.1055/s-0037-1613935
Commentary
Schattauer GmbH

Aspirin Potentiates LPS-induced Fibrin Formation (FPA) and TNF-α-synthesis in Whole Blood

L.T.N. Osnes
1   From the Research and Development Group, Dept. of Clinical Chemistry, Ullevaal University Hospital, Oslo, Norway
,
K.B. Foss Haug
1   From the Research and Development Group, Dept. of Clinical Chemistry, Ullevaal University Hospital, Oslo, Norway
,
G.B. Joø
1   From the Research and Development Group, Dept. of Clinical Chemistry, Ullevaal University Hospital, Oslo, Norway
,
Å.-B. Westvik
1   From the Research and Development Group, Dept. of Clinical Chemistry, Ullevaal University Hospital, Oslo, Norway
,
R. Øvstebø
1   From the Research and Development Group, Dept. of Clinical Chemistry, Ullevaal University Hospital, Oslo, Norway
,
P. Kierulf
› Author Affiliations
Further Information

Publication History

Received 25 June 1999

Accepted after resubmission 24 January 2000

Publication Date:
14 December 2017 (online)

Summary

The effect of aspirin on LPS-incubation of whole blood was investigated. Aspirin induced a concentration dependent increase (2.5–5-fold at 5 mM aspirin) in LPS-induced appearance of TNF-α and fibrinopeptide A (FPA) in plasma, despite the concomitant increase in the inhibitory cytokine IL-10. Aspirin substantially raised the levels of LPS-induced TF-mRNA and TNFα-mRNA in monocytes isolated from whole blood. The median ratio for TF-/β-actin mRNA increased from 1.5 ± 0.44 in the presence of LPS-alone, to 2.5 ± 0.51 when 5 mM aspirin was added. The TNFα/β-actin mRNA ratios were 1.8 ± 0.4 and 5.5 ± 2.7 respectively. Addition of exogenous PGE2 before incubation nearly abrogated the effect of aspirin on TNF-α, substantiating the role of PGE2 as a regulator of TNF-α synthesis, whereas the effect on FPA was small. Thus, in the presence of LPS in this whole blood model, aspirin apparently had a pro-inflammatory rather than an anti-inflammatory effect.

 
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