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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Characterization of f-Met-Leu-Phe-stimulated fluid pinocytosis in human polymorphonuclear leukocytes by flow cytometry.

N-formylated chemotactic peptide stimulation of human neutrophils initiates a number of cellular processes, such as lysosomal enzyme release and superoxide anion production, that are indicative of the events of neutrophil activation during the acute inflammatory response in disease. This study characterizes a newly recognized neutrophil activation event, N-formylated chemotactic peptide-stimulated fluid pinocytosis in human neutrophils, using a novel flow cytometric assay for this activity. Fluid pinocytosis was found to be inhibited by acidic pH and low temperature but could be enhanced by cytochalasin B treatment or surface adherence by neutrophils. The activity measured by this new assay of fluid pinocytosis appears to be separate and distinct from lysosomal enzyme release and receptor-mediated adsorptive endocytosis in neutrophils. The physiologic significance of N-formylated chemotactic peptide-stimulated fluid pinocytosis is not known, but a possible relationship to neutrophil locomotion is discussed.[1]


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