1984
DOI: 10.1002/cyto.990050410
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7‐amino‐actinomycin D as a specific fluorophore for DNA content analysis by laser flow cytometry

Abstract: A technique for DNA amount determination by flow cytometry based on the use of 7-amino-actinomycin D (7-amino-AMD), a fluorescent analogue of antibiotic actinomycin has been investigated, and a particular staining procedure has been developed. The procedure includes short fixation in 70% ethanol and staining for 20 min in 10W5M solution of 7-amino-AMD at pH7. The results of DNA content measurements are very reproducible. The histograms obtained have a coefficient of variation less than 3%.The absorption maximu… Show more

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Cited by 50 publications
(29 citation statements)
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“…The need for a second laser is only a minor disadvantage, since there are many excellent research flow cytometers which are equipped as standard with a low-power HeNe laser, for instance the Coulter Elite flow cytometer (19). 7AAD and Hoechst 33342 have been proposed as alternatives for PI in multiparameter flow cytometry (1,11,14,20). However, in our hands, using epithelial cells, 7AAD gave unacceptable high coefficients of variation (CVs) (data not shown).…”
Section: Resultsmentioning
confidence: 63%
See 1 more Smart Citation
“…The need for a second laser is only a minor disadvantage, since there are many excellent research flow cytometers which are equipped as standard with a low-power HeNe laser, for instance the Coulter Elite flow cytometer (19). 7AAD and Hoechst 33342 have been proposed as alternatives for PI in multiparameter flow cytometry (1,11,14,20). However, in our hands, using epithelial cells, 7AAD gave unacceptable high coefficients of variation (CVs) (data not shown).…”
Section: Resultsmentioning
confidence: 63%
“…In 1984, Zelenin et al investigated an alternative DNA stain, 7-amino-actinomycin D (7AAD), which has an emission spectrum with a maximum at a longer wavelength compared to PI (>650 nm) (20). Although the quantum efficiency is low, it can be used in combination with FITC-and PE-labeled antibodies using only one single (488 nm) excitation beam (11).…”
mentioning
confidence: 99%
“…Cells stained in the presence of Triton X-100 were permeable to both dyes; similar results were obtained for staining times from 30 minutes to 1 week. The H33258 concentration must be kept low to avoid secondary binding (371, while it appears that the 7-AMD concentration is not critical (42). H33258 did not compete for 7-AMD binding sites, since similar results (546-nm excitation) were obtained when H33258 was omitted from the staining buffer.…”
Section: Stainingmentioning
confidence: 89%
“…Owing to the complex structure of the molecule it is difficult to predict its precise interaction with biological membranes at a given pH; its size however will impede membrane penetration. 7-AAD forms very stable complexes with DNA (15). Its very high binding constant and slow dissociation rate (6) allow the use of 7-AAD at low dye concentration which reduces the amount of unbound free dye that could attach passively to the surface of live cells and could eventually lead to staining of live cells.…”
Section: Discussionmentioning
confidence: 99%
“…7-amino-actinomycin D (7-AAD) is a G-C base-specific DNA intercalator (1) that can be excited by the ' 488 nm argon laser line (15) and emits in the far red range of the spectrum (Fig. 1); 7-AAD spectral emission can be effectively separated from the emissions of FITC and PE.…”
mentioning
confidence: 99%