Title : Chemotactic peptide modulation of actin assembly and locomotion in neutrophils.

Pub. Date : 1984 Apr

PMID : 6232281






6 Functional Relationships(s)
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1 Since NBD-phallacidin binds specifically to F-actin, the increase in fluorescent staining of cells likely reflects an increase in the F-actin content of fMLP-stimulated cells. phallacidin formyl peptide receptor 1 Homo sapiens
2 The NBD-phallacidin staining is not due to phagocytosis, is inhibited by phalloidin, requires cell permeabilization, and is saturable at NBD-phallacidin concentrations greater than 10(-7)M. The fMLP-induced increase in NBD-phallacidin staining occurs rapidly (less than 2 min), is temperature dependent, and is not due to cell aggregation. phallacidin formyl peptide receptor 1 Homo sapiens
3 The NBD-phallacidin staining is not due to phagocytosis, is inhibited by phalloidin, requires cell permeabilization, and is saturable at NBD-phallacidin concentrations greater than 10(-7)M. The fMLP-induced increase in NBD-phallacidin staining occurs rapidly (less than 2 min), is temperature dependent, and is not due to cell aggregation. phallacidin formyl peptide receptor 1 Homo sapiens
4 The NBD-phallacidin staining is not due to phagocytosis, is inhibited by phalloidin, requires cell permeabilization, and is saturable at NBD-phallacidin concentrations greater than 10(-7)M. The fMLP-induced increase in NBD-phallacidin staining occurs rapidly (less than 2 min), is temperature dependent, and is not due to cell aggregation. phallacidin formyl peptide receptor 1 Homo sapiens
5 FACS analysis of NBD-phallacidin-stained cells shows that the relative F-actin content of neutrophils stimulated with 10(-11)-10(-8)M fMLP increases twofold and remains increased at concentrations greater than 10(-8)M fMLP. phallacidin formyl peptide receptor 1 Homo sapiens
6 Therefore, the fMLP-induced increase in F-actin content of neutrophils as determined by FACS analysis of NBD-phallacidin-stained cells coincides with a decrease in G-actin and correlates with increased mROL of neutrophils under some (10(-11)-10(-8)M fMLP) but not all (greater than 10(-8)M fMLP) conditions of stimulation. phallacidin formyl peptide receptor 1 Homo sapiens