A NEW FLOW CYTOMETRIC METHOD FOR DISCRIMINATION OF APOPTOTIC CELLS AND DETECTION OF THEIR CELL-CYCLE SPECIFICITY THROUGH STAINING OF F-ACTIN AND DNA

被引:52
作者
ENDRESEN, PC
PRYTZ, PS
AARBAKKE, J
机构
[1] UNIV TROMSO, INST MED BIOL, DEPT PHARMACOL, N-9001 TROMSO, NORWAY
[2] UNIV TROMSO HOSP, DEPT PATHOL, N-9012 TROMSO, NORWAY
来源
CYTOMETRY | 1995年 / 20卷 / 02期
关键词
APOPTOSIS; FLOW CYTOMETRY; F-ACTIN; FITC-PHALLOIDIN; PROPIDIUM IODIDE; CELL CYCLE;
D O I
10.1002/cyto.990200209
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Drug-initiated apoptosis of human leukemia HL-60, THP-1, and U-937 cells was studied via multiparameter now cytometry and cell sorting, A new now cytometric method that allows both identification and quantitation of apoptotic cells and estimation of their cell cycle specificity is presented, The method is based on paraformaldehyde fixation followed by staining of F-actin and DNA with fluorescein isothiocyanate (FITC)-phalloidin and propidium iodide (PI), respectively, Bivariate green fluorescence (F-actin) vs, side scatterplots of HL-60 cells treated with 10 mu M etoposide for 4 h showed two cell populations, one with high green fluorescence and low side scatter and one with low green fluorescence and high side scatter, Sorting revealed cells with intact nuclei in the high green fluorescence/low side scatter population and cells with fragmented nuclei in the low green fluorescence/high side scatter population, demonstrating that the cells in the latter population were apoptotic, Exposure of HL-60 cells to 10 mu M etoposide for 4 h resulted in S-phase selective apoptosis, whereas 5 mu g/ml cycloheximide initiated apoptosis mainly in G(0)G(1)-phase and S-phase cells, The apoptotic response of HL-60 cells to 20 GY gamma-irradiation was selective for S-phase and G(2) + M-phase cells, The present method offers the opportunity to estimate the cell cycle distributions of both the apoptotic and the nonapoptotic cell populations, which is especially valuable when apoptosis occurs in association with cell cycle perturbations, A similar shift from one to two cell populations in green fluorescence vs, side scatter-plots, similar to that observed for HL-60 cells, was observed in the THP-1 and U-937 cell Lines secondary to etoposide treatment. (C) 1995 Wiley-Liss, Inc.
引用
收藏
页码:162 / 171
页数:10
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