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- W4231851292 abstract "We studied actin polymerization in the HL-60 human promyelocytic leukemia cell line during induced myeloid maturation and its relationship to the rate of locomotion (ROL). The percent G-actin (of total actin) was measured by DNAase I inhibition, F-actin was determined by fluorescence-activated cell sorter (FACS) analysis of nitrobenzoxadiazol (NBD)-phallacidin-stained cells, and ROL was measured by computer-assisted analysis of the tracks of individual cells. Uninduced HL-60 cells moved slowly (2.3 +/- 1.0 microns/min) and showed no change in ROL or in the state of actin polymerization when stimulated by formyl-methionyl-leucyl-phenylalanine (fMLP). Nonstimulated cells induced to differentiate with dimethylformamide had no change in the degree of actin polymerization but exhibited a mean (m) ROL similar to normal human polymorphonuclear leukocytes (PMN) (8.6 +/- 1.4 micron/min [HL-60 cells] v 7.8 +/- 1.8 microns/min [PMN]. When induced HL-60 cells were stimulated with fMLP, actin polymerization occurred. The F-actin content increased, as determined by FACS analysis of NBD-phallacidin-stained cells, and the percentage of G-actin decreased, as determined by a 24.5% decrease in DNAase I inhibitory activity. However, induced HL-60 cells stimulated with fMLP did not increase their mROL. These studies show that, unlike normal human PMN, chemotactic peptides can cause an intracellular biochemical change that is not associated with a chemokinetic response in induced HL-60 cells. The HL-60 cell line may be a useful model to study the development of chemotactic peptide-mediated actin polymerization during myeloid cell maturation." @default.
- W4231851292 created "2022-05-12" @default.
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- W4231851292 date "1987-08-01" @default.
- W4231851292 modified "2023-10-05" @default.
- W4231851292 title "Actin polymerization and its relationship to locomotion and chemokinetic response in maturing human promyelocytic leukemia cells" @default.
- W4231851292 doi "https://doi.org/10.1182/blood.v70.2.363.bloodjournal702363" @default.
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