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Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
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Photonic-chip assisted correlative light and electron microscopy.

Jean-Claude Tinguely1, Anna Maria Steyer2, Cristina Ionica Øie3

  • 1Department of Physics and Technology, UiT The Arctic University of Norway, 9019, Tromsø, Norway.

Communications Biology
|December 8, 2020
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Summary
This summary is machine-generated.

We developed photonic chip-assisted correlative light and electron microscopy (CLEM) for high-resolution cell imaging. This method precisely locates cellular structures, revealing nano-scale features and protein cargo dynamics.

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Area of Science:

  • Cellular and Molecular Imaging
  • Microscopy Techniques
  • Nanotechnology Applications

Background:

  • Correlative light and electron microscopy (CLEM) integrates light microscopy (LM) and electron microscopy (EM) for detailed cellular visualization.
  • Existing CLEM methods face challenges in precise localization and large field-of-view imaging.

Purpose of the Study:

  • To introduce photonic chip-assisted CLEM for enhanced cellular imaging.
  • To improve the precision and scope of target area localization for EM.
  • To enable multi-modal total internal reflection fluorescence (TIRF) microscopy over large fields of view.

Main Methods:

  • Development of photonic chips as integrated substrates for sample holding, illumination, and landmarking.
  • Utilizing a grid-like numbering system on photonic chips for precise sample navigation.
  • Application of multi-modal TIRF microscopy for large field-of-view imaging and localization.

Main Results:

  • Demonstrated precise tracking and localization of areas of interest for EM analysis.
  • Successfully imaged the 3D structural organization of nano-sized fenestrations in liver sinusoidal endothelial cells.
  • Correlated endo-lysosomal compartments with specific cargo proteins during endocytosis.

Conclusions:

  • Photonic chip-assisted CLEM offers a powerful platform for high-resolution cellular structural and dynamic studies.
  • This technique enhances the ability to investigate nano-scale cellular features and molecular trafficking.
  • The developed method provides a versatile tool for advancing cell biology research.