Invasion Metastasis
March 1994
Interleukin-2 (IL-2) has been reported to induce mononuclear cell-dependent platelet perturbations and to reduce the incidence of metastases in rodent models. In this study, MC-1 leukemic cell-induced platelet aggregation was associated with a significant increase in thromboxane B2 (TXB2) secretion, quantified by RIA, but a decrease in leukotriene B4 (LTB-4) secretion compared to incubations of tumor cells alone. Whereas MC-1 cells also activated platelets as observed by a significant increase in scanning electron-microscopic spheroidal forms distributed throughout the platelet pool, increasing concentrations of IL-2-activated peripheral blood mononuclear cells (PBMC), but not IL-2 or PBMC alone, reversed this effect with a reduction in activated spheroidal forms.
View Article and Find Full Text PDFAs many as 94 patients with yersiniosis were examined for the morphofunctional status of platelets (aggregation, disaggregation, endo-exocytosis and platelet forms). The data indicate that platelet from patients with yersiniosis possess a high ability for aggregation and a low ability for disaggregation. According to the experimental and clinical data, emoxipine can restore disturbed function of human platelets.
View Article and Find Full Text PDFVestn Akad Med Nauk SSSR
April 1992
Platelets play the leading role in circulatory disorders seen in patients with infectious diseases. Endotoxinemia leads to platelet activation which shows up by the transformation of platelet forms from disk-shaped to spheroidal and by changes in aggregation and secretion. The degree of those changes correlates with the disease gravity.
View Article and Find Full Text PDFZh Mikrobiol Epidemiol Immunobiol
November 1989
The functional activity of thrombocytes (aggregation, endo- and exocytosis) and erythrocytes (aggregation) in healthy persons given a course of interferon or reaferon treatment has been studied. The results obtained in this study indicate that these preparations produce a modulating effect on the functions of thrombocytes and erythrocytes of donors having shown abnormal functional activity of these blood cells prior to the course of treatment.
View Article and Find Full Text PDFThe effect of PAF in aggregation of platelets induced by endotoxin was studied in experiments in vitro. It is indicated that in high concentration (1.10(-7)-1.
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