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Related Concept Videos

Stem Cell Niche01:26

Stem Cell Niche

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The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
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Renewal of Intestinal Stem Cells01:23

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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
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Adult Stem Cells01:33

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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Multipotency and Niche of Bulge Stem Cell01:06

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A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
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Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

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Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
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Related Experiment Video

Updated: Apr 29, 2026

The Organoid Reconstitution Assay ORA for the Functional Analysis of Intestinal Stem and Niche Cells
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The intestinal stem cell niche: a computational tissue approach.

Peter Buske, Jens Przybilla1, Markus Loeffler

  • 1*Interdisciplinary Center for Bioinformatics, University of Leipzig, Härtelstrasse 16-18, D-04107 Leipzig, Germany.

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|May 23, 2014
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Summary

Mathematical models reveal how intestinal stem cell niches organize and function. These models simulate cell behavior in crypts and organoids, explaining tissue renewal and niche formation through cell interactions and biomechanics.

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Area of Science:

  • * Developmental Biology
  • * Computational Biology
  • * Stem Cell Biology

Background:

  • * The intestinal epithelium requires constant renewal, maintained by intestinal stem cells (ISCs).
  • * The ISC niche, a specialized microenvironment, is crucial for ISC function but its regulatory principles remain unclear.
  • * Understanding ISC niche dynamics is key to comprehending intestinal homeostasis and disease.

Purpose of the Study:

  • * To review and present single cell-based computational models of ISC organization in murine intestinal crypts and organoids.
  • * To investigate the spatiotemporal dynamics governing ISC behavior and niche formation.
  • * To link computational modeling with experimental observations of intestinal tissue renewal.

Main Methods:

  • * Development of pedigree models to simulate cell kinetics and lineage tracing.
  • * Refinement of models to incorporate biomechanical properties and environmental influences on cell fate.
  • * Creation of computational models for both intestinal crypts and organoids.

Main Results:

  • * Models successfully replicate key experimental observations, including cell proliferation, migration, lineage decisions, and clonal competition within crypts.
  • * A novel model of intestinal organoids demonstrates a self-organizing ISC niche.
  • * The organoid model suggests niche establishment relies on cell secretion and spatial organization influenced by tissue biomechanics.

Conclusions:

  • * Computational modeling provides a powerful framework for understanding ISC niche regulation.
  • * The study proposes that ISC niche self-organization is driven by cellular secretions and biomechanical factors.
  • * These findings offer insights into intestinal tissue renewal and potential therapeutic targets.