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Related Experiment Video

Updated: Apr 24, 2026

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Interferometric ultra-high resolution 3D imaging through brain sections.

Hao-Cheng Gao1, Fan Xu2,3,4, Xi Cheng5

  • 1Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA.

Nature Communications
|April 22, 2026
PubMed
Summary
This summary is machine-generated.

We developed 4Pi-BRAINSPOT, a novel super-resolution microscopy technique. This method achieves nanoscale protein localization in intact brain tissue, overcoming scattering and aberrations for unprecedented cellular and tissue imaging.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Neuroscience

Background:

  • Single-molecule super-resolution microscopy offers nanometer precision for molecular localization in cells.
  • Optical scattering and aberrations hinder molecular resolution imaging in intact biological tissues.

Purpose of the Study:

  • To develop an advanced microscopy technique enabling nanoscale resolution imaging within complex brain tissue.
  • To overcome the limitations of optical scattering and aberrations in thick tissue specimens.

Main Methods:

  • Integration of 4Pi single-molecule switching nanoscopy with dynamic in-situ coherent point spread function (PSF) modeling.
  • Application of single-molecule compatible tissue clearing and light-sheet illumination.
  • Utilization of a quantitative analysis pipeline for highly accurate 3D molecular coordinates.

Main Results:

  • Achieved sub-15-nm resolution in all three dimensions within complex tissue specimens.
  • Quantified protein distribution and revealed nanoscale organelle architecture.
  • Resolved the membrane morphology of individual dendritic spines in 50-µm mouse brain slices.

Conclusions:

  • 4Pi-BRAINSPOT enables ultra-high-resolution imaging in native tissue environments.
  • The technique provides precise nanoscale molecular distribution analysis.
  • Deciphers nanoscale organelle architecture and molecular organization with nanometer precision.