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. 1979 Nov;76(11):5728-30.
doi: 10.1073/pnas.76.11.5728.

Estimation of membrane potentials of individual lymphocytes by flow cytometry

Estimation of membrane potentials of individual lymphocytes by flow cytometry

H M Shapiro et al. Proc Natl Acad Sci U S A. 1979 Nov.

Abstract

The membrane potentials of individual cells can be estimated by flow cytometric quantitation of the cells' uptake of the fluorescent lipophilic cationic dye 3,3'-dihexyloxacarbocyanine iodide. Human lymphocytes separated from peripheral blood on Hypaque-Ficoll gradients are uniformly depolarized by gramicidin and hyperpolarized by valinomycin. Concanavalin A and phytohemagglutinin depolarize only a fraction of the lymphocytes. The flow cytometric technique allows precise detection of heterogeneous membrane potential responses to stimuli such as lectins; it could also provide a basis for sorting cells that respond differently to a given stimulus.

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