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• W2044137136 abstract "Background: Molecular rotors are fluorescent molecules that exhibit viscosity-dependent fluorescence quantum yield, potentially allowing direct measurements of cell membrane viscosity in cultured cells. Commercially available rotors, however, stain not only the cell membrane, but also bind to tubulin and migrate into the cytoplasm. We synthesized molecules related to 9-(dicyanovinyl)-julolidine (DCVJ), which featured hydrocarbon chains of different length to increase membrane compatibility.Results: Longer hydrocarbon chains attached to the fluorescent rotor reduce the migration of the dye into the cytoplasm and internal compartments of the cell. The amplitude of the fluorescence response to fluid shear stress, known to decrease membrane viscosity, is significantly higher than the response obtained from DCVJ. Notably a farnesyl chain showed a more than 20-fold amplitude over DCVJ and allowed detection of membrane viscosity changes at markedly lower shear stresses.Conclusions: The modification of molecular rotors towards increased cell membrane association provides a new research tool for membrane viscosity measurements. The use of these rotors complements established methods such as fluorescence recovery after photobleaching with its limited spatial and temporal resolution and fluorescence anisotropy, which has low sensitivity and may be subject to other effects such as deformation." @default.
• W2044137136 created "2016-06-24" @default.
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• W2044137136 date "2001-02-01" @default.
• W2044137136 modified "2023-10-18" @default.
• W2044137136 title "New fluorescent probes for the measurement of cell membrane viscosity" @default.
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• W2044137136 doi "https://doi.org/10.1016/s1074-5521(00)90061-9" @default.
• W2044137136 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/11251287" @default.
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