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Updated: Aug 27, 2025

Laser Capture Microdissection of Mammalian Tissue
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Mouse Paneth Cell-Enriched Proteome Enabled by Laser Capture Microdissection.

Jongmin Woo1, Madeline Schoenfeld1, Xinguo Sun1

  • 1Center for Translational Biomedical Research, University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, North Carolina 28081, United States.

Journal of Proteome Research
|September 25, 2022
PubMed
Summary
This summary is machine-generated.

This study developed a new method to analyze Paneth cells, which are crucial for gut immunity. The technique successfully identified over 1300 proteins, offering insights into these vital antimicrobial peptide-secreting cells.

Keywords:
Paneth celllaser capture microdissectionmouse small intestineproteomicstoluidine bluevilli

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Area of Science:

  • Gastroenterology
  • Proteomics
  • Cell Biology

Background:

  • Paneth cells, located in the small intestine crypts, secrete antimicrobial peptides but are difficult to study in isolation due to their proximity to stem cells.
  • Defining the Paneth cell proteome is essential for understanding their role in intestinal immunity and disease.

Purpose of the Study:

  • To develop and validate a novel proteomics approach for the direct analysis of Paneth cells from mouse intestinal tissue.
  • To characterize the proteome of intestinal crypts enriched for Paneth cells and identify key antimicrobial components.

Main Methods:

  • A simplified toluidine blue O staining method was employed for mouse intestinal tissue.
  • Laser capture microdissection (LCM) was used to isolate cells from the crypt region.
  • Surfactant-assisted one-pot protein digestion was utilized for proteomic analysis.

Main Results:

  • Over 1300 proteins were identified from approximately 18,000 crypt cells, significantly enriched in antimicrobial peptides like defensins and lysozymes.
  • The LCM-based proteomics approach demonstrated high sensitivity, achieving comparable results with as few as 3600 cells.
  • This study represents the first proteomics investigation of Paneth cell-enriched intestinal tissue.

Conclusions:

  • The developed workflow enables direct proteomic profiling of Paneth cells and associated pathological changes from frozen intestinal tissue.
  • This simplified method is valuable for studying Paneth cell function, gut immunity, and potentially other spatially resolved cell types in various tissues.