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Exosite crosstalk in thrombin.
J Thromb Haemost
January 2025
Department of Medicine, McMaster University; Department of Biochemistry and Biomedical Sciences, McMaster University; Thrombosis and Atherosclerosis Research Institute, McMaster University and Hamilton Health Sciences.
Thrombin is the central mediator of hemostasis, where it converts fibrinogen to fibrin, activates upstream factors to promote coagulation, activates factor XIII and thrombin-activatable fibrinolysis inhibitor to stabilize fibrin, mediates anticoagulation, and modulates cellular activity via cell surface receptors. Thus, regulation of thrombin activity is essential to the hemostatic balance. Thrombin is regulated by positively charged surface domains that surround the active site.
View Article and Find Full Text PDFDedicator of Cytokinesis 2 regulates cytoskeletal actin dynamics and is essential for platelet biogenesis and functions.
Cardiovasc Res
January 2025
Department of Pharmacology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
Aims: Dedicator of Cytokinesis 2 (DOCK2), a member of the DOCK family of Guanine nucleotide exchange factors that specifically act on the Rho GTPases including Rac and Cdc42, plays pivotal roles in the regulation of leukocyte homeostasis. However, its functions in platelets remain unknown.
Methods And Results: Using mice with genetic deficiency of DOCK2 (Dock2-/-), we showed that Dock2-/-mice exhibited a macrothrombocytopenic phenotype characterized as decreased platelet count and enlarged platelet size by transmission electron microscopy.
The effect of SARS-CoV-2 Omicron BA. 5.2 infection on perioperative physiological indicators in orthopedic patients.
BMC Musculoskelet Disord
January 2025
Department of Anesthesiology, General Hospital of Central Theater Command of PLA, Wuhan, China.
Objective: The aim of this study was to investigate the effect of SARS-CoV-2 Omicron BA. 5.2 (hereafter referred to as Omicron BA.
View Article and Find Full Text PDFIntravenous tenecteplase bridging reperfusion ameliorates cerebral ischemia/reperfusion injury by improving microvascular circulation in rats.
J Thromb Haemost
January 2025
Department of Neurology, General Hospital of Northern Theater Command; Shenyang, 110016, China. Electronic address:
Background: Endovascular treatment (EVT) alone was not demonstrated to be non-inferior to intravenous alteplase bridging EVT in acute large vessel occlusion (LVO) stroke. Using cerebral ischemia/reperfusion (I/R) injury model, intravenous tenecteplase (TNK) was administrated after ischemia followed by reperfusion at various time points.
Objectives: To investigate whether intravenous TNK bridging EVT vs EVT alone could improve I/R injury, and this effect may be associated with the time from TNK to reperfusion.
Background: Research on heart injury caused by COVID-19 is limited to large observational and retrospective cohort studies using imaging or pathological data. Reported changes in the levels of myocardial markers in severe diseases have been limited, with few studies on mild infections. The effects of COVID-19 on cardiac function and changes in myocardial marker levels have not yet been reported.
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