Leucocyte aggregation describes one type of biophysical behaviour of white cells. To test whether this parameter is changed in burned patients, 15 burn victims were investigated immediately after admission into hospital. Cell counts and aggregation were measured and related to the prognosis of the injury. Compared with normal controls, burning injury is associated with higher white cell counts and enhanced leucocyte aggregation. Fatal injuries showed a (non-significant) tendency for higher aggregation values than survivors. There are significant positive correlations between white cell counts, maximal aggregation values and the burned body surface area. The results suggest that leucocyte aggregation is pathologically enhanced in response to burns. Possibly this alteration is of prognostic importance.
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http://dx.doi.org/10.1016/0305-4179(89)90035-1 | DOI Listing |
Blood
January 2025
Medical University of Vienna, Vienna, Austria.
In thrombosis and hemostasis, the formation of a platelet-fibrin thrombus or clot is a highly controlled process that varies, depending on the pathological context. Major signaling pathways in platelets are well established. However, studies with genetically modified mice have identified the contribution of hundreds of additional platelet-expressed proteins in arterial thrombus formation and bleeding.
View Article and Find Full Text PDFSTAR Protoc
January 2025
Heinz-Nixdorf-Chair of Biomedical Electronics, TranslaTUM, School of Computation, Information and Technology, TUM, Germany; Munich Institute of Biomedical Engineering, TUM, Germany. Electronic address:
Blood cell aggregates are clinically useful biomarkers in a number of medical disorders. This protocol provides accurate and quantitative analysis of cell aggregates using a small volume of whole blood and imaging flow cytometry. We describe steps for sample collection, staining, and measurement.
View Article and Find Full Text PDFMedicina (Kaunas)
January 2025
Department of Internal Medicine (Nephrology), Faculty of Medicine, Ufuk University, 06510 Ankara, Turkey.
Immunoglobulin G4-related disease (IgG4-RD) is an immune-mediated, fibroinflammatory, multiorgan disease with an obscure pathogenesis. Findings indicating excessive platelet activation have been reported in systemic sclerosis, which is another autoimmune, multisystemic fibrotic disorder. The immune-mediated, inflammatory, and fibrosing intersections of IgG4-RD and systemic sclerosis raised a question about platelets' role in IgG4-RD.
View Article and Find Full Text PDFBlood
January 2025
University Hospital, LMU Munich, Munich, Germany.
Platelets are crucial players in hemostasis and thrombosis, but also contribute to immune regulation and host defense, using different receptors, signaling pathways and effector functions, respectively. Whether distinct subsets of platelets specialize in these diverse tasks is insufficiently understood. Here, we employed an in vivo pulse-labelling method in Mus musculus models for tracking in vivo platelet ageing and its functional implications.
View Article and Find Full Text PDFCardiovasc 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.
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