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Related Experiment Video

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Expansion microscopy imaging of various neuronal structures.

In Cho1, Jueun Sim1, Jae-Byum Chang1

  • 1Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.

Methods in Cell Biology
|January 22, 2021
PubMed
Summary

Expansion microscopy (ExM) enables nanoscale visualization of biomolecules, crucial for understanding biological processes and diseases. This guide details ExM methods for high-resolution biological imaging.

Keywords:
DNA-antibody conjugationExpansion microscopy (ExM)Iterative expansion microscopy (iExM)Re-embeddingSuper-resolution microscopy

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Microscopy

Background:

  • Nanoscale visualization of biomolecules is vital for understanding biological mechanisms and diseases.
  • Existing techniques face limitations in achieving high resolution for spatial distribution analysis.
  • Expansion microscopy (ExM) offers a promising solution for high-resolution biological imaging.

Purpose of the Study:

  • To introduce the principles and variants of expansion microscopy (ExM).
  • To provide practical guidelines for implementing ExM and related techniques.
  • To highlight ExM's utility in achieving nanoscale precision for biomolecular visualization.

Main Methods:

  • Introduction to the core concept of expansion microscopy.
  • Discussion of various ExM protocols and their adaptations.
  • Guidance on sample preparation and imaging procedures for ExM.

Main Results:

  • ExM achieves sub-20-nm resolution imaging of biological specimens.
  • Enables visualization of biomolecular spatial distribution with nanoscale precision.
  • Compatible with conventional diffraction-limited microscopy.

Conclusions:

  • Expansion microscopy is a powerful technique for high-resolution biological imaging.
  • Practical implementation guidelines are provided for researchers.
  • ExM facilitates deeper understanding of molecular mechanisms in biology and disease.