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- W2096759740 abstract "To gain a better understanding of the internalization of rhodamines, vital staining of living cells in situ by two different rhodamines, R110 and R123, was studied by microfluorometry. These dyes differ strongly in their lipophilic properties because of differences in charge distribution. Microspectrofluorometry was used to study the fluorescence emission spectra of R110-loaded cells to determine reliable loading conditions. Cell uptake and cell efflux studies of R110 were performed by numerical microfluorescence imaging. A slower uptake was observed for R110 (14 hr) vs R123 (2 hr), but the R110 efflux was much more rapid (30 min) than that of R123 (> 24 hr). Although it appeared in the R110 and R123 co-localization study that R110 was able to accumulate in mitochondria, labeling with R110 was lower than with R123. Our results indicate that, rhodamine 110 in its acid cationic form is able to cross the plasma and mitochondrial membrane and to accumulate in cell compartments as does the cationic rhodamine 123. However, because of its acido-basic properties, R110 should be able to decrease the pH of cell compartments, depending on their ability to regulate pH. In such a model, mitochondrial pH should be more greatly decreased than cytosolic pH, leading to a lower mitochondrial accumulation of R110 than of R123. Surprisingly, these effects, which should affect the energetic state of mitochondria, do not influence cell growth, because no cytotoxic effect was observed." @default.
- W2096759740 created "2016-06-24" @default.
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- W2096759740 date "1997-03-01" @default.
- W2096759740 modified "2023-09-27" @default.
- W2096759740 title "Intracellular Accumulation of Rhodamine 110 in Single Living Cells" @default.
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- W2096759740 doi "https://doi.org/10.1177/002215549704500308" @default.
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