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Cell Tissue Kinet. 1987 Jul;20(4):387-91.

Simultaneous staining of exponentially growing versus plateau phase cells with the proliferation-associated antibody Ki-67 and propidium iodide: analysis by flow cytometry.

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Institute of Biophysics and Radiobiology, University of Hamburg, F.R.G.


The antibody Ki-67, which detects proliferating cells, was used in combination with propidium iodide, a DNA-specific dye. The double-staining method allowed discrimination of cells in the phases of the cell cycle as well as the recognition of Ki-67 staining characteristics. Suspension cultures of U937 cells were measured in exponential growth and plateau phase in nutritional deprivation. The fraction of Ki-67 positive cells was nearly 100% 2 days after dilution and 46% 7 days after dilution of the cultures. Stathmokinetic measurements with colchicine and flow cytometry measurements with the BrdU-Hoechst technique yielded close to 100% proliferation at day 2 but only 18% and 6%, respectively, at day 7. The discrepancy between Ki-67 results and the results of the two other methods is considered to be a characteristic of nutritionally deprived cells.

[Indexed for MEDLINE]

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