Heparin-induced thrombocytopenia (HIT) and heparin-induced thrombocytopenia with thrombosis (HITT) syndromes are the result of an adverse reaction to heparin that results in a spectrum of laboratory and end-organ manifestations secondary to thrombosis of both arterial and venous small and large vessels. HITT most often manifests in the extremities as acral ischemia and necrosis, with a spectrum...

Stent thrombosis is an example of device-induced, plateletmediated arterial thrombosis. Rates of stent thrombosis can vary from 1% to 10% depending on the patient population, genetic predisposition, device type, pharmacological choices, and duration of antiplatelet pharmacotherapy. The Platelet Colloquium is an annual academic–industry–governmental thinktank meeting devoted to identifying resea...

Heparin-induced thrombocytopenia (HIT) is a major cause of morbidity and mortality resulting from the associated thrombosis. Extensive studies using our transgenic mouse model of HIT have shown that antibodies reactive with heparin-platelet factor 4 complexes lead to FcγRIIA-mediated platelet activation in vitro as well as thrombocytopenia and thrombosis in vivo. We tested PRT-060318 (PRT318), ...

Arterial thrombosis occurs at sites of erosion or rupture of atherosclerotic vascular lesions. To better study the pathophysiology of this complex phenomenon, there is a need for animal models of localised thrombosis at sites of atherosclerotic lesions with closer resemblance to the human pathology as compared to commonly used thrombosis models in healthy vessels. In the present study, we descr...

Introduction. We investigated the activated protein C resistance (APCR) phenotype and the lupus anticoagulant (LA), activity induced by anti-β2-glycoprotein-I (anti-β2GP-I) antibodies. Patients and methods. We studied plasma and sera samples from 29 patients with persistently positive anti-β2GPI: 22 with thrombosis (12 with primary APS, 10 with APS secondary to SLE) and seven without thrombosis...

The main cause of acute coronary syndrome may be recurrent thrombosis, which is initiated by the activation of the extrinsic coagulation pathway. Tissue factor (TF) pathway inhibitor (TFPI) efficiently inhibits an early step in this pathway by the formation of a complex with factor VIIa, TF, and factor Xa. We determined whether local TFPI gene transfer can inhibit thrombosis in an injured arter...

Objectives Venous thrombosis and thrombocytopenia after vaccination with the adenovirus-vectored COVID-19 vaccine ChAdOx1 nCov-19 (AstraZeneca) have been linked to serum antibodies against platelet factor 4 (PF4)-polyanion complexes. We here report vaccine-induced isolated carotid arterial thrombosis. Methods Imaging laboratory findings, treatment decisions, outcome of this case are presented. ...

Background: Venous thromboembolism, which comprises deep vein thrombosis and pulmonary embolism and is a significant cause of morbidity and mortality among patients with cancer. The aim of the present study was to report a rare presentation of arterial thrombosis after venous thrombosis in a patient with gastric cancer. Report of the Case: A 45 year-old female patient with locally advanced gas...