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Related Experiment Video

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High Resolution 3D Imaging of the Human Pancreas Neuro-insular Network
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3D Imaging Resolves Human Pancreatic Duct-β-Cell Clusters During Cystic Change.

Chih-Yuan Lee1, Ting-Chun Kuo1, Ya-Hsien Chou2,3

  • 1Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan.

Diabetes
|January 9, 2025
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Summary

Pancreatic microcysts and low-grade neoplasias show increased cytokeratin 7 and insulin signals, indicating remodeling of pancreatic tissue. This study reveals associated duct-beta-cell structures in microcysts using 3D imaging.

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Area of Science:

  • Endocrinology
  • Gastroenterology
  • Cell Biology

Background:

  • Pancreatic cystic changes are common in adults, but their effect on local beta-cell populations is unknown.
  • Epithelial remodeling is a key feature of pancreatic cystic lesions and neoplasias.

Purpose of the Study:

  • To investigate the association between pancreatic microcysts and beta-cell populations.
  • To examine epithelial remodeling in pancreatic microcysts and low-grade pancreatic intraepithelial neoplasias (PanIN).

Main Methods:

  • Human cadaveric pancreases (n=10) were analyzed using stereomicroscopy, H&E histology, and 3D immunohistochemistry.
  • 3D/Airyscan superresolution imaging was employed to visualize duct-beta-cell associations.
  • Cytokeratin 7 (CK7) and insulin immunoreactivity were quantified.

Main Results:

  • Microcysts (n=36) and low-grade PanIN (n=54) showed increased CK7 and insulin signals compared to normal pancreatic lobules.
  • Distinct duct-beta-cell associations, including beta-cells within the epithelium and in clusters, were visualized in microcysts.
  • Polarized cellular organization was observed, with insulin vesicles near the basal domain of beta-cells and CK7 in the apical domain of duct cells.

Conclusions:

  • Pancreatic microcyst formation involves local pancreatic exocrine and endocrine tissue remodeling.
  • The study provides a robust 3D imaging approach to characterize duct-beta-cell associations in microcysts, addressing potential imaging artifacts.