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Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization

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Antithrombin Deficiency Is Associated with Prothrombotic Plasma Fibrin Clot Phenotype.

Joanna Natorska^1,2, Javier Corral³, Maria Eugenia de la Morena-Barrio³

¹Department of Experimental Cardiac Surgery, Anesthesiology and Cardiology, Institute of Cardiology, Jagiellonian University Medical College, Kraków, Poland.

Thrombosis and Haemostasis

|May 18, 2023

Summary

Antithrombin deficiency in patients leads to altered fibrin clot structure and function, increasing thrombosis risk. Restoring antithrombin levels in vitro improved clot properties and reduced thrombin generation.

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Published on: September 9, 2012

Area of Science:

Hematology
Thrombosis Research
Vascular Biology

Background:

Antithrombin deficiency is a known risk factor for venous thromboembolism.
The specific impact of antithrombin deficiency on fibrin clot structure and function remains to be fully elucidated.

Purpose of the Study:

To investigate how antithrombin deficiency influences fibrin clot permeability and lysis.
To assess the relationship between antithrombin deficiency, thrombin generation, and clot characteristics.

Main Methods:

Evaluated 148 patients with confirmed antithrombin deficiency and 50 healthy controls.
Assessed fibrin clot permeability (K_s), clot lysis time (CLT), and thrombin generation capacity.
Analyzed clot properties before and after in vitro normalization of antithrombin activity.

Main Results:

Antithrombin-deficient patients exhibited significantly reduced antithrombin activity and antigen levels.
Patients showed increased thrombin generation (higher endogenous thrombin potential and peak thrombin).
Antithrombin deficiency was associated with reduced clot permeability and prolonged clot lysis time, which were partially reversed by adding exogenous antithrombin.

Conclusions:

Enhanced thrombin generation and a prothrombotic fibrin clot phenotype are key contributors to the elevated thrombosis risk in antithrombin deficiency.
Fibrin clot structure and function are significantly impaired in individuals with antithrombin deficiency.