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Spin trapping/electron paramagnetic resonance (EPR) spectroscopy allows specific detection of nitric oxide (NO) generation, in vivo. However, in order to detect an EPR signal in living organism, usually a stimulation of immune system with LPS is used to achieve higher than physiological NO levels. Here, we report non-invasive spin trapping of NO in tumors of non-treated, living animals. EPR spectroscopy...
Primary cultures of endothelial cells, grown on the three-dimensional matrix Gelfoam where they take on the morphology of these cells in vivo, were found to phagocytose Staphylococcus aureus and two strains of Escherichia coli. The phagocytosis was independent of opsonization, although once opsonized, these bacteria were phagocytosed by endothelial cells. As cytochalsin D inhibited the internationalization...
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