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Updated: Jun 4, 2025

Protocols for Analyzing the Role of Paneth Cells in Regenerating the Murine Intestine using Conditional Cre-lox Mouse Models
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Paneth Cells: Dispensable yet Irreplaceable for the Intestinal Stem Cell Niche.

Michaela Quintero1, Linda C Samuelson2

  • 1Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan.

Cellular and Molecular Gastroenterology and Hepatology
|December 21, 2024
PubMed
Summary

Paneth cells, while not essential, support intestinal stem cell function and niche maintenance. Their loss prompts stem cell adaptation, highlighting their supportive role in gut regeneration and development.

Keywords:
Cellular RemodelingIntestinal CryptNotch SignalingTissue RegenerationWNT Signaling

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Area of Science:

  • Gastroenterology
  • Stem Cell Biology
  • Cell Biology

Background:

  • Intestinal stem cells (ISCs) continuously regenerate the gut epithelium.
  • Paneth cells are located near ISCs and express niche factors, suggesting a role in the ISC niche.
  • The necessity of Paneth cells for ISC function remains debated.

Purpose of the Study:

  • To review the components of the intestinal stem cell niche.
  • To discuss the potential contribution of Paneth cells to the ISC niche.
  • To present a nuanced perspective on Paneth cells as niche cells.

Main Methods:

  • Literature review of the intestinal stem cell niche.
  • Analysis of Paneth cell interactions with ISCs.
  • Discussion of Paneth cell function in intestinal development and regeneration.

Main Results:

  • The ISC niche involves Notch, Wnt, growth factor, mechanical, and metabolic signaling.
  • Paneth cells are not strictly required for ISC function but enhance it.
  • Paneth cell loss can induce ISC niche remodeling.

Conclusions:

  • Paneth cells play a supportive, non-essential role in the intestinal stem cell niche.
  • Paneth cells contribute to ISC function, especially during development and regeneration.
  • Intestinal stem cell behavior adapts to Paneth cell presence or absence.