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Polarization Assay Studies of Human Neutrophil Motility

The polarization assay was used to assess the effects of chemoattractants on neutrophil motility by means of cellular configuration. The addition of N‐formyl‐L‐methionyl‐phenylalanine (f‐Met‐Phe) to a neutrophil suspension from human peripheral blood induced a polarized change in cellular configuration, and the ratio of such transfiguration reached a maximum at 10–8 to 10–6 M of f‐Met‐Phe. The polarized configuration appeared 1 min after addition of f‐Met‐Phe and showed its maximum response at 10 min. The number of polarized cells were decreased after exposure to cytochalasin B or incubating with corticosteroid. The increased response of random polarization was induced in a dose‐dependent fashion by ascorbic acid. Tetracycline HCl did not cause any changes in cell shape at any concentrations examined. This assay can be used to examine patients with depressed neutrophil motility, such as those with systemic lupus erythematosus in the active phase and a severe case of atopic dermatitis.