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PcSOFI as a smart label-based superresolution microscopy technique.

Benjamien Moeyaert1, Peter Dedecker

  • 1Department of Chemistry, University of Leuven, Celestijnenlaan 200 F, 3001, Heverlee, Leuven, Belgium.

Methods in Molecular Biology (Clifton, N.J.)
|April 11, 2014
PubMed
Summary
This summary is machine-generated.

Stochastic optical fluctuation imaging (SOFI) offers superresolution microscopy using fluorescent protein labels. This protocol details photoconversion SOFI (pcSOFI) for enhanced imaging of cellular structures like actin filaments.

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Area of Science:

  • Biophysics
  • Microscopy
  • Cell Biology

Background:

  • Stochastic optical fluctuation imaging (SOFI) is a superresolution technique surpassing the diffraction limit.
  • Photoconversion SOFI (pcSOFI) adapts SOFI for fluorescent protein-labeled samples, enabling accessible superresolution imaging.
  • Reversibly switchable fluorescent proteins, or "smart labels," are key to advanced superresolution imaging methods.

Purpose of the Study:

  • To provide a detailed protocol for performing photoconversion SOFI (pcSOFI).
  • To demonstrate the application of pcSOFI using smart labels in biological samples.
  • To showcase superresolution imaging of human β-actin in HeLa cells.

Main Methods:

  • Utilizing reversibly photoswitchable fluorescent protein Dronpa as a smart label.
  • Applying stochastic optical fluctuation imaging principles adapted for photoconversion (pcSOFI).
  • Imaging HeLa cells expressing human β-actin labeled with Dronpa.

Main Results:

  • Successful generation of superresolution images using pcSOFI.
  • Demonstration of enhanced resolution beyond the diffraction limit.
  • Visualization of cellular structures, specifically human β-actin, with improved detail.

Conclusions:

  • Photoconversion SOFI (pcSOFI) provides a straightforward method for superresolution imaging.
  • Reversibly switchable fluorescent proteins are powerful tools for advanced microscopy.
  • This protocol facilitates high-resolution imaging of cellular components in live cells.