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Fluorescent erythrosin B is preferable to trypan blue as a vital exclusion dye for mammalian cells in monolayer culture

AW Krause, WW Carley and WW Webb

Erythrosin B and trypan blue are tested and compared for their effectiveness as vital exclusion stains for mammalian cells in monolayer culture. Both stains are supposed to mark cells that have lost membrane integrity. Fluorescein diacetate (FDA), an efficient vital inclusion stain, is used as a control, as it marks cells retaining membrane integrity. Erythrosin B and FDA are used as fluorescent dyes, whereas trypan blue colors via light absorption. The effectiveness of both vital exclusion stains is assayed by their ability to stain a high percentage of monolayer cells exposed to treatments lethal to an entire cell population. Two types of lethal treatment, severe heat and metabolic poison, are employed. Erythrosin B stains all monolayer cells immediately after complete lethal treatment. Trypan blue optimally stains only about 60% of monolayer cells. Cell staining by erythrosin B and by FDA are found to be mutually exclusive. This result demonstrates the coincidence of viability indications by erythrosin B and FDA and thus confirms the reliability of both viability stains as they probe membrane permeability via independent mechanisms. This study shows that erythrosin B is an effective, nontoxic, and convenient fluorescent vital exclusion dye for three mammalian cell lines in monolayer culture, but tends to disqualify trypan blue for this application.

Volume 32, Issue 10, pp. 1084-1090, 10/01/1984
Copyright © 1984 by The Histochemical Society


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