Procoagulant platelet activation promotes venous thrombosis.

医学 血小板 血栓 血小板活化 血栓形成 静脉血栓形成 止血 凝结 下腔静脉 内科学 药理学 心脏病学 免疫学
作者
Rainer Kaiser,Robin Dewender,Maité Mulkers,Julia Stermann,Dario Rossaro,Lea di Fina,L LI,Christoph Gold,Michael Schmid,Lily Kääb,Luke Eivers,Sezer Akgöl,Keyang Yue,Lisa Maria Kammerer,Quentin Loew,Afra Anjum,Raphael Escaig,Anastassia Akhalkatsi,Lisa Sophia Laun,Jan Kranich,Thomas Brocker,Tonina T. Mueller,Angelina Kraechan,Jonas Gmeiner,Kami Pekayvaz,Manuela Thienel,Steffen Maßberg,Konstantin Stark,Badr Kilani,Leo Nicolai
出处
期刊:Blood [American Society of Hematology]
标识
DOI:10.1182/blood.2024025476
摘要

Platelets are key players in cardiovascular disease and platelet aggregation represents a central pharmacological target, particularly in secondary prevention. However, inhibition of adenosine diphosphate and thromboxane signaling has low efficacy in preventing venous thromboembolism, necessitating the inhibition of the plasmatic coagulation cascade in this disease. Anticoagulation carries a significantly higher risk of bleeding complications, highlighting the need of alternative therapeutic approaches. We hypothesized that procoagulant activation (PA) of platelets promotes venous thrombus formation and that targeting PA could alleviate venous thrombosis. Here, we found elevated levels of procoagulant platelets in the circulation of patients with deep vein thrombosis (DVT) and pulmonary embolism, and in mice developing DVT following inferior vena cava stenosis. Further, we detected procoagulant activation of recruited platelets within murine and human venous thrombi. Mice with platelet-specific deficiency in central pathways of procoagulant activation - cyclophilin D and transmembrane protein 16F - were more resistant towards low flow-induced venous thrombosis. Finally, we found that a clinically approved carbonic anhydrase inhibitor, methazolamide, reduced platelet procoagulant activity and alleviated murine thrombus formation without affecting trauma-associated hemostasis. These findings identify an essential role of platelet procoagulant function in venous thrombosis and delineate novel pharmacological strategies targeting platelets in preventing venous thromboembolism.

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