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Preserved hemostatic status in patients with non-alcoholic fatty liver disease
Wilma Potze1, Mohammad S Siddiqui2, Sherry L Boyett2
1Surgical Research Laboratory, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Background & Aims:
Non-alcoholic fatty liver disease (NAFLD) is associated with an increased risk of thrombosis. However, it remains unclear if hypercoagulability contributes to this risk. We, therefore, determined an in-depth hemostatic profile in a cohort of well-defined patients with NAFLD.
Methods:
We drew blood samples from 68 patients with biopsy-proven NAFLD (simple steatosis n=24, NASH n=22, and NASH cirrhosis n=22), 30 lean controls, 30 overweight controls (body mass index (BMI) >25kg/m2), and 15 patients with alcoholic (ASH) cirrhosis, and performed in-depth hemostatic profiling.
Results:
Basal and agonist-induced platelet activation, plasma levels of markers of platelet activation, and plasma levels of the platelet adhesion regulators von Willebrand factor and ADAMTS13 were comparable between patients with non-cirrhotic NAFLD and controls. Agonist-induced platelet activation was decreased in patients with cirrhosis. Thrombomodulin-modified thrombin generation was comparable between all patients and controls, although patients with cirrhosis had a reduced anticoagulant response to thrombomodulin. Thromboelastography test results were comparable between controls and non-cirrhotic NAFLD patients, but revealed moderate hypocoagulability in cirrhosis. Plasma fibrinolytic potential was decreased in overweight controls and non-cirrhotic NAFLD, but accelerated fibrinolysis was observed in ASH cirrhosis. Clot permeability was decreased in overweight controls and patients with NAFLD.
Conclusions:
The overall hemostatic profile is comparable between patients with non-cirrhotic NAFLD and controls. Additionally, pro-thrombotic features (hypofibrinolysis and a pro-thrombotic structure of fibrin clot) in patients with NAFLD are likely driven by obesity. Our study suggests a limited role for hyperactive hemostasis in the increased thrombotic risk in NAFLD.
Lay Summary:
The combined results of this study show that the overall hemostatic status is comparable between healthy individuals and patients with a fatty liver disease.
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