Li Cong, Braun Attila, Zu Juan, Gudermann Thomas, Mammadova-Bach Elmina, Anders Hans-Joachim
Division of Nephrology, Department of Medicine IV, Ludwig Maximilian University Hospital, 80336 Munich, Germany.
Walther Straub Institute of Pharmacology and Toxicology, Ludwig Maximilian University, 80336 Munich, Germany.
Cells. 2025 Jul 14;14(14):1075. doi: 10.3390/cells14141075.
Procoagulant platelets are a specialized subset of activated platelets that externalize phosphatidylserine (PS) on their surface, facilitating the assembly of tenase and prothrombinase complexes and enhancing thrombin generation and clot formation. Although procoagulant platelet formation shares certain features with nucleated cell death pathways, such as mitochondrial dysfunction, calcium (Ca) overload, membrane blebbing, and microvesiculation, it differs in key molecular mechanisms, notably lacking nuclei and caspase-dependent deoxyribonucleic acid (DNA) fragmentation. Interestingly, molecular components of nucleated cell death pathways in platelets can promote thrombus formation without impacting platelet lifespan. Under pathological conditions, excessive platelet activation may result in platelet lysis, resembling the complete activation of nucleated cell death pathways and contribute to thrombocytopenia. This review compares procoagulant platelet formation with various nucleated cell death pathways, including necrosis, necroptosis, pyroptosis, and ferroptosis, and explores their role in pathological thrombosis and blood clotting. A deeper understanding of mechanisms may help in developing targeted therapies to prevent aberrant blood clotting, platelet death and thrombocytopenia.
促凝血小板是活化血小板的一个特殊亚群,其在表面外化磷脂酰丝氨酸(PS),促进凝血酶原酶和凝血酶原酶复合物的组装,并增强凝血酶生成和血栓形成。尽管促凝血小板的形成与有核细胞死亡途径有某些共同特征,如线粒体功能障碍、钙(Ca)超载、膜泡形成和微囊泡化,但其在关键分子机制上有所不同,尤其是缺乏细胞核和半胱天冬酶依赖性脱氧核糖核酸(DNA)片段化。有趣的是,血小板中有核细胞死亡途径的分子成分可促进血栓形成而不影响血小板寿命。在病理条件下,过度的血小板活化可能导致血小板溶解,类似于有核细胞死亡途径的完全激活,并导致血小板减少。本综述比较了促凝血小板形成与各种有核细胞死亡途径,包括坏死、坏死性凋亡、炎性小体介导的细胞焦亡和铁死亡,并探讨了它们在病理性血栓形成和血液凝固中的作用。对机制的更深入理解可能有助于开发靶向治疗方法,以预防异常的血液凝固、血小板死亡和血小板减少。