Thrombin-activatable fibrinolysis inhibitor and sex modulate thrombus stability and pulmonary embolism burden in a murine model.

Autor:	Chessum JE; Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada., Shaya SA; Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada., Rajab D; Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada., Aftabjahani A; Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada., Zhou J; Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada., Weitz JI; Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada; Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada., Gross PL; Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada., Kim PY; Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada. Electronic address: paul.kim@taari.ca.
Jazyk:	angličtina
Zdroj:	Journal of thrombosis and haemostasis : JTH [J Thromb Haemost] 2024 Jan; Vol. 22 (1), pp. 263-270. Date of Electronic Publication: 2023 Sep 24.
DOI:	10.1016/j.jtha.2023.09.016
Abstrakt:	Background: Thrombin-activatable fibrinolysis inhibitor (TAFI) levels are positively correlated with the risk of thrombosis. The mechanism of how TAFI affects venous thromboembolism (VTE) remains uncertain. In addition, the role of sex on the risk of VTE has also been studied. However, their association also remains unclear. Objectives: To investigate how TAFI and/or sex affect venous thrombus stability and consequent pulmonary embolism (PE). Methods: Ferric chloride-induced thrombi were formed within the femoral veins of male and female wild-type (WT) or TAFI-knockout (Cpb2 -/- ) mice. Thrombi were imaged over 2 hours using intravital videomicroscopy to quantify embolization and thrombus size over time. Lungs were examined by immunohistochemistry to quantify (a) emboli and (b) fibrin composition of these emboli. Results: Embolization events in female mice were higher than in males (7.9-fold in WT and 3.1-fold in Cpb2 -/- mice). Although the maximal thrombus sizes were not different across groups, Cpb2 -/- mice had thrombi that were, on average, 24% smaller at the end of the 2-hour experiment than WT mice. Loss of TAFI led to a 4.0- and 2.8-fold increase in PE burden in males and females, respectively, while sex had no influence. Pulmonary emboli in Cpb2 -/- mice had higher fibrin composition compared with WT mice. Conclusion: Female mice had less stable venous thrombi than male mice, suggesting a higher risk of PE in females with deep vein thrombosis. Mice lacking TAFI had more thrombus degradation and higher PE burden than WT mice. These results confirm the role of TAFI in venous thrombosis. Competing Interests: Declaration of competing interests The authors declare no competing financial interests. (Copyright © 2023 International Society on Thrombosis and Haemostasis. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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