Self-calibrating viscosity probes: Design and subcellular localization
摘要:
We describe the design, synthesis and fluorescence profiles of new self-calibrating viscosity dyes in which a coumarin (reference fluorophore) has been covalently linked with a molecular rotor (viscosity sensor). Characterization of their fluorescence properties was made with separate excitation of the units and through resonance energy transfer from the reference to the sensor dye. We have modified the linker and the substitution of the rotor in order to change the hydrophilicity of these probes thereby altering their subcellular localization. For instance, hydrophilic dye 12 shows a homogeneous distribution inside the cell and represents a suitable probe for viscosity measurements in the cytoplasm. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and evaluation of self-calibrating ratiometric viscosity sensors
作者:Hyung-Jo Yoon、Marianna Dakanali、Darcy Lichlyter、Willy M. Chang、Karen A. Nguyen、Matthew E. Nipper、Mark A. Haidekker、Emmanuel A. Theodorakis
DOI:10.1039/c0ob01042a
日期:——
We describe the design, synthesis and fluorescent profile of a family of self-calibrating dyes that provide ratiometric measurements of fluid viscosity. The design is based on covalently linking a primary fluorophore (reference) that displays a viscosity-independent fluorescence emission with a secondary fluorophore (sensor) that exhibits a viscosity-sensitive fluorescence emission. Characterization of fluorescent properties was made with separate excitation of the units and through Resonance Energy Transfer from the reference to the sensor dye. The chemical structures of both fluorophores and the linker length have been evaluated in order to optimize the overall brightness and sensitivity of the viscosity measurements. We also present an application of such ratiometric dyes for the detection of membrane viscosity changes in a liposome model.
Self-calibrating viscosity probes: Design and subcellular localization
作者:Marianna Dakanali、Thai H. Do、Austin Horn、Akaraphon Chongchivivat、Tuptim Jarusreni、Darcy Lichlyter、Gianni Guizzunti、Mark A. Haidekker、Emmanuel A. Theodorakis
DOI:10.1016/j.bmc.2012.05.026
日期:2012.7
We describe the design, synthesis and fluorescence profiles of new self-calibrating viscosity dyes in which a coumarin (reference fluorophore) has been covalently linked with a molecular rotor (viscosity sensor). Characterization of their fluorescence properties was made with separate excitation of the units and through resonance energy transfer from the reference to the sensor dye. We have modified the linker and the substitution of the rotor in order to change the hydrophilicity of these probes thereby altering their subcellular localization. For instance, hydrophilic dye 12 shows a homogeneous distribution inside the cell and represents a suitable probe for viscosity measurements in the cytoplasm. (C) 2012 Elsevier Ltd. All rights reserved.