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A new method for the preparation of metaphase chromosomes for flow analysis

R Sillar and BD Young

A new method for the preparation of metaphase chromosomes for flow analysis has been evaluated. It has been shown that this method, which involves detergent lysis of metaphase cells and polyamines to stabilize the DNA, yields lower coefficients of variation and background levels in the DNA histograms than is currently obtained by hexylene glycol based methods. A conventional flow cytometer (FACS-II) has been used to resolve the human karyotype into about 14 peaks after ethidium bromide staining and excitation with a relatively low level of illumination (0.4 W at 488 nm). Flow karyotypes have also been obtained from suspension cell lines, in particular from the mouse cell line, Friend 707/B10. The only disadvantage of this method is that the chromosomes are highly condensed and therefore banding studies on sorted chromosomes may not be possible.

Volume 29, Issue 1, pp. 74-78, 01/01/1981
Copyright © 1981 by The Histochemical Society


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