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Conducting Multiple Imaging Modes with One Fluorescence Microscope
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Sequential superresolution imaging of multiple targets using a single fluorophore.

Christopher C Valley1, Sheng Liu2, Diane S Lidke1

  • 1Department of Pathology and Cancer Research and Treatment Center, University of New Mexico, Albuquerque, New Mexico, United States of America.

Plos One
|April 11, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces sequential superresolution (SR) imaging, enabling multi-color visualization of cellular structures using a single fluorophore. This method overcomes limitations of traditional multi-color SR microscopy for detailed molecular imaging.

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Area of Science:

  • Cellular and Molecular Imaging
  • Biophysics
  • Microscopy Techniques

Background:

  • Superresolution (SR) microscopy offers nanometer-scale resolution for imaging cellular structures and molecular processes.
  • Multi-color SR imaging is challenging due to fluorophore properties and optical complexities like chromatic aberration.
  • Existing methods struggle with fluorophore limitations, including photobleaching and sensitivity to buffer conditions.

Purpose of the Study:

  • To develop a method for sequential SR imaging of multiple targets using a single fluorophore.
  • To overcome limitations of traditional multi-color SR microscopy.
  • To enable high-precision overlay of multiple image acquisitions for detailed cellular analysis.

Main Methods:

  • Developed a sequential labeling and imaging approach for SR microscopy.
  • Utilized brightfield image correlation for precise registration and overlay of image acquisitions (~10 nm precision).
  • Employed AlexaFluor647 for direct stochastic reconstruction microscopy (dSTORM) imaging of cellular proteins.

Main Results:

  • Successfully imaged four distinct cellular proteins using sequential SR (s-SR) imaging with a single fluorophore.
  • Achieved negligible cross-talk between sequential images.
  • Visualized dynamic changes in epidermal growth factor (EGF) receptor and clathrin co-localization during endocytosis.

Conclusions:

  • Sequential SR (s-SR) imaging using dSTORM is demonstrated for the first time.
  • This method allows for multi-target SR imaging with high precision and minimal cross-talk.
  • The developed sequential imaging approach is broadly applicable to various superresolution techniques.