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Flow microfluorometric and light-scatter measurement of nuclear and cytoplasmic size in mammalian cells

JA Steinkamp, KM Hansen and HA Crissman

A technique for rapid measurement of nuclear and cytoplasmic size relationships in mammalian cell populations has been developed. Based on fluorescence staining of either the nucleus alone or in combination with the cytoplasm using two-color fluorescence methods, this technique permits the simultaneous determination of nuclear and cytoplasmic diameters from fluorescence and light-scatter measurements. Cells stained in liquid suspension pass through a flow chamber at a constant velocity, intersecting a laser beam which excites cell fluorescence and causes light scatter. Depending upon which analysis procedure is used, optical sensors measure nuclear fluorescence and light scatter (whole cell size) or two-color nuclear and cytoplasmic fluorescence from individual cells crossing the laser beam. The time durations of signals generated by the nucleus and cytoplasm are converted electronically into signals proportional to the respective diameters and are displayed as frequency distribution hitograms. Illustrative examples of measurements on uniform microspheres, cultured mammalian cells and human exfoliated gynecologic cells are presented.

Volume 24, Issue 1, pp. 292-297, 01/01/1976
Copyright © 1976 by The Histochemical Society


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P. Horan and L. Wheeless Jr
Quantitative single cell analysis and sorting
Science, October 14, 1977; 198(4313): 149 - 157.
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