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Multimodal Hierarchical Imaging of Serial Sections for Finding Specific Cellular Targets within Large Volumes

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Visualizing cells at the nanoscale.

Andrew Leis¹, Beate Rockel, Lars Andrees

¹Max Planck Institute of Biochemistry, Department of Molecular Structural Biology, Am Klopferspitz 18, D-82152 Martinsried, Germany.

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Summary

Cryo-electron tomography (cryo-ET) offers detailed 3D views of biological samples. Advances in cryosectioning now allow imaging of whole cells and tissues, revealing molecular organization.

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Area of Science:

Biophysics
Cell Biology
Microscopy

Background:

Cryo-electron tomography (cryo-ET) provides high-resolution 3D imaging of biological specimens.
Conventional electron microscopy faces challenges with sample preparation artifacts.
Previous cryo-ET studies were limited to smaller samples due to electron penetration depth.

Purpose of the Study:

To highlight the capabilities of cryo-electron tomography for biological imaging.
To discuss the impact of recent cryosectioning advancements on cryo-ET.
To emphasize the potential for understanding cellular molecular organization.

Main Methods:

Utilizing cryogenic specimen preparation to minimize artifacts.
Employing cryo-electron tomography for 3D visualization.
Leveraging recent cryosectioning techniques for thicker samples.

Main Results:

Cryo-ET enables visualization of biological material at an unprecedented scale.
Advanced cryosectioning allows tomogram acquisition from various vitrified cells and tissues.
This technique overcomes previous limitations in sample size and type.

Conclusions:

Cryo-ET, particularly with improved cryosectioning, is a powerful tool for structural biology.
The ability to image larger, more complex samples opens new avenues for research.
Systematic analysis of cryo-ET data will yield deep insights into cellular landscapes and molecular organization.