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Related Experiment Video

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A high-throughput imaging and nuclear segmentation analysis protocol for cleared 3D culture models.

Molly E Boutin1, Ty C Voss2, Steven A Titus2

  • 1Division of Preclinical Innovation, National Center for Advancing Translational Sciences (NCATS), National Institutes of Health, 9800 Medical Center Drive, Building B, Rockville, Maryland, 20850, USA. molly.boutin@nih.gov.

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|July 26, 2018
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Summary

This study introduces a high-throughput optical clearing and imaging protocol for 3D cell cultures. This method enhances fluorescent signal clarity, enabling efficient nuclear segmentation and analysis for drug discovery applications.

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Drug Discovery Technologies

Background:

  • 3D cell culture models present imaging challenges due to light scattering in multicellular layers.
  • Efficient high-throughput imaging and analysis are crucial for utilizing 3D models in drug discovery.

Purpose of the Study:

  • To develop a high-throughput protocol for optical clearing and imaging of 3D cell cultures.
  • To enable efficient and quantitative analysis of fluorescent signals within complex 3D structures.
  • To improve nuclear segmentation and subpopulation identification in 3D cell models.

Main Methods:

  • Optical clearing of spheroids to reduce light scattering.
  • High-content confocal imaging of cleared 3D cell models.
  • 3D nuclear segmentation and quantitative post-segmentation analysis.
  • Development of a metric to assess clearing efficacy on deep-tissue segmentation.

Main Results:

  • Demonstrated successful nuclear segmentation across multiple cell types in 3D cultures.
  • Accurate identification of fluorescently-labeled cell subpopulations within cleared samples.
  • Quantified improvement in nuclear segmentation deep within the 3D models due to optical clearing.
  • Achieved unprecedented throughput for 3D culture model analysis.

Conclusions:

  • The developed protocol significantly enhances sample clarity, overcoming light scattering limitations in 3D imaging.
  • This pipeline enables high-throughput, quantitative analysis of 3D cell models, advancing their use in drug discovery.
  • The method allows for accurate segmentation and identification of cellular features deep within complex 3D structures.