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Factor VIIa - antithrombin complexes are increased in asthma: relation to the exacerbation-prone asthma phenotype.
Thromb Haemost
January 2025
Department of Medicine, Jagiellonian University School of Medicine, Cracow, Poland.
Background: Asthma is associated with a prothrombotic state. Plasma factor VIIa-antithrombin complex concentrations (FVIIa-AT) indirectly reflect the interaction of tissue factor (TF) with FVII. Since TF is a key initiator of coagulation in vivo, we hypothesized that FVIIa-AT are higher in asthma.
View Article and Find Full Text PDFMice with Reduced PAR4 Reactivity show Decreased Venous Thrombosis and Platelet Procoagulant Activity.
J Thromb Haemost
January 2025
Case Western Reserve University, School of Medicine, Department of Pharmacology, Cleveland, OH United States. Electronic address:
Background: Hypercoagulation and thrombin generation are major risk factors for venous thrombosis. Sustained thrombin signaling through PAR4 promotes platelet activation, phosphatidylserine exposure, and subsequent thrombin generation. A single-nucleotide polymorphism in PAR4 (rs2227376) changes proline to leucine extracellular loop 3 (P310L), which decreases PAR4 reactivity and is associated with a lower risk for venous thromboembolism (VTE) in a GWAS meta-analysis.
View Article and Find Full Text PDFChemotherapy alters thrombomodulin and factor VIIIc expression resulting in acquired activated protein C resistance and enhanced thrombin generation in cancer associated thrombosis.
Thromb Res
December 2024
Department of Obstetrics and Gynaecology, Trinity College Dublin, Dublin, Ireland; Trinity St. James's Cancer Institute, Dublin, Ireland. Electronic address:
Background: Tumour type, treatment and patient related factors contribute to cancer associated venous thromboembolism (VTE), however, the role of each factor and the mechanisms involved are not understood.
Aim: To assess the role of the tumour, and of chemotherapy, in mediating the procoagulant response associated with VTE in gynaecological cancer patients.
Methods: Gynaecological cancer patients who developed VTE during follow-up (n = 59) (VTE+) were matched with treatment naïve(treatment (-)(VTE-)(n = 120) and chemotherapy treated patients(treatment (+)(VTE-) (n = 57)).
Real-Time Imaging of Platelet-Initiated Plasma Clot Formation and Lysis Unveils Distinct Impacts of Anticoagulants.
Thromb Haemost
January 2025
Department of Medical Physiology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
Background: Fibrinolysis is spatiotemporally well-regulated and greatly influenced by activated platelets and coagulation activity. Our previous real-time imaging analyses revealed that clotting commences on activated platelet surfaces, resulting in uneven-density fibrin structures, and that fibrinolysis initiates in dense fibrin regions and extends to the periphery. Despite the widespread clinical use of direct oral anticoagulants (DOACs), their impact on thrombin-dependent activation of thrombin-activatable fibrinolysis inhibitor (TAFI) and fibrinolysis remains unclear.
View Article and Find Full Text PDFBleeding Symptoms in Pediatric Patients with Congenital FVII Deficiency and Correlation to Thrombin Generation Assay Parameters: A Single-Center Retrospective Analysis.
Life (Basel)
November 2024
Onco-Hematology, Cell and Gene Therapy and Bone Marrow Transplant Clinic Area, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy.
Inherited factor VII deficiency is the most common rare bleeding disorder, affecting about 1/500,000 individuals without gender predilection. Most of the patients with FVII 20-50% are asymptomatic, but post-traumatic or post-surgical bleeding may often occur since there is not an exact correlation between FVII plasma levels and the bleeding phenotype. We enrolled 19 children and adolescents with FVII levels of 20-35% and 33 controls.
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