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Fluorogenic probes for live-cell imaging of the cytoskeleton
Gražvydas Lukinavičius1, Luc Reymond2, Elisa D'Este3
11] Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland. [2].
Nature Methods
|May 27, 2014
Summary
New far-red probes enable bright, photostable imaging of cellular structures in living cells. These probes reveal unprecedented detail of the centrosome and neuronal actin organization using stimulated emission depletion microscopy.
Area of Science:
- Cell Biology
- Microscopy
- Biochemistry
Background:
- Fluorescence imaging is crucial for visualizing cellular structures.
- Existing probes often suffer from photobleaching, low brightness, or cytotoxicity.
- Understanding cytoskeletal dynamics requires high-resolution imaging in living cells.
Purpose of the Study:
- To develop novel far-red, fluorogenic probes for live-cell imaging.
- To assess the probes' brightness, photostability, and cytotoxicity.
- To apply these probes for high-resolution imaging of cytoskeletal components.
Main Methods:
- Synthesis of far-red, fluorogenic probes.
- Live-cell fluorescence imaging.
- Stimulated emission depletion (STED) microscopy.
- Imaging of actin and tubulin in cultured rat neurons.
Main Results:
- The developed probes exhibit minimal cytotoxicity, high brightness, and excellent photostability.
- Probes enabled visualization of the ninefold symmetry of the centrosome.
- High-resolution imaging of actin organization in neuronal axons was achieved.
Conclusions:
- The novel far-red probes are suitable for advanced live-cell fluorescence imaging.
- These probes offer unprecedented resolution for studying cytoskeletal structures.
- The findings advance the capability for dynamic studies of cellular architecture.
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