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Methods for array tomography with correlative light and electron microscopy.

Taro Koike1, Hisao Yamada2

  • 1Department of Anatomy and Cell Science, Kansai Medical University, Shinmachi 2-5-1, Hirakata, Osaka, Japan. koiket@hirakata.kmu.ac.jp.

Medical Molecular Morphology
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Summary

Array tomography enables detailed three-dimensional ultrastructure visualization, overcoming limitations of 2D electron microscopy. This review covers specimen preparation and staining for advanced 3D imaging and correlative microscopy.

Keywords:
Array tomographyCorrelative light and electron microscopyPost-embedding stainingPre-embedding stainingThree-dimensional electron microscopy

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Area of Science:

  • Microscopy
  • Cell Biology
  • Structural Biology

Background:

  • Two-dimensional electron microscopy offers limited insight into complex cellular structures.
  • Three-dimensional ultrastructure provides a more comprehensive understanding of biological organization.
  • Array tomography is a key technique for achieving high-resolution 3D imaging.

Purpose of the Study:

  • To review specimen preparation techniques for array tomography.
  • To discuss staining methods applicable to array tomography.
  • To explore the utility of array tomography in correlative light and electron microscopy.

Main Methods:

  • Array tomography involves preparing serial ultrathin sections of resin-embedded tissue.
  • Sections are mounted on a substrate for observation using scanning electron microscopy.
  • Techniques for ribbon collection and post-embedding staining are detailed.

Main Results:

  • Array tomography allows for semi-eternal storage of sections, enabling observation at multiple magnifications.
  • The method is compatible with various staining techniques, including immunocytochemistry.
  • Recent advancements have simplified specimen preparation.

Conclusions:

  • Array tomography is a valuable technique for reconstructing three-dimensional cellular ultrastructure.
  • Optimized specimen preparation and staining enhance the utility of array tomography.
  • Its adaptability makes it suitable for correlative imaging studies.