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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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The three-compartment open model is a pharmacokinetic model used to describe the distribution and elimination of drugs following extravascular administration. It comprises a central compartment representing the plasma and two peripheral compartments. The highly perfused peripheral compartment represents organs and tissues with a rich blood supply, such as the liver, kidneys, and lungs. The scarcely perfused peripheral compartment represents tissues with lower blood supply, such as adipose...
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Compartment Models: Two-Compartment Model01:20

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The two-compartment model divides the body into central and peripheral compartments to account for varying blood perfusion rates among organs and tissues, affecting drug distribution. The central compartment includes blood and highly perfused tissues with rapid drug distribution, while the peripheral compartment contains tissues with slower drug distribution. After a single IV bolus dose, the drug concentration is high in plasma and low in tissues. The drug distribution between compartments...
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The operon model represents a fundamental mechanism of gene regulation in prokaryotes, enabling coordinated expression of genes involved in related metabolic or functional pathways. Operons consist of structural genes, a promoter, and an operator, with transcription regulated by repressors, activators, and small effector molecules.Structure and Function of OperonsAn operon is a cluster of structural genes transcribed together under the control of a single promoter. The promoter region...
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Multicompartment models are mathematical constructs that depict how drugs are distributed and eliminated within the body. They segment the body into several compartments, symbolizing various physiological or anatomical areas connected through drug transfer processes such as absorption, metabolism, distribution, and elimination.
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Multicompartmental models are crucial tools in pharmacokinetics, providing a framework to understand how drugs move within the body. The two-compartment model is a crucial subtype, segmenting the body into central and peripheral compartments. The central compartment represents areas with high blood flow, such as plasma and highly perfused organs like the kidneys and liver, while the peripheral compartment signifies tissues with lower blood flow, like adipose tissue and muscle tissue.
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Related Experiment Video

Updated: May 4, 2026

Three-Dimensional Culture of Murine Colonic Crypts to Study Intestinal Stem Cell Function Ex Vivo
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Three-Dimensional Culture of Murine Colonic Crypts to Study Intestinal Stem Cell Function Ex Vivo

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A mathematical model of the colon crypt capturing compositional dynamic interactions between cell types.

Kieran Smallbone1, Bernard M Corfe

  • 1Manchester Centre for Integrative Systems Biology, University of Manchester, Manchester, UK.

International Journal of Experimental Pathology
|December 21, 2013
PubMed
Summary

This study enhances colorectal cancer models by incorporating new cell types and regulatory feedback loops, improving the understanding of colon crypt dynamics and cell fate.

Keywords:
apoptosiscancercell cyclecell-cell signallingcolon cryptdifferentiationmathematical model

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Generation of Murine Primary Colon Epithelial Monolayers from Intestinal Crypts
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Area of Science:

  • Cell biology
  • Cancer research
  • Mathematical modeling

Background:

  • Colorectal cancer models often use linear pathways and lack regulatory mechanisms.
  • Existing models do not account for enteroendocrine cell population perturbations.
  • Current models fail to fully recapitulate colon crypt cell fate dynamics.

Purpose of the Study:

  • To develop and refine a compartmental model of colon crypts.
  • To incorporate additional cell types and regulatory feedback mechanisms.
  • To better represent the dynamics of cell turnover, proliferation, differentiation, and death in the colon crypt.

Main Methods:

  • Progressive development and iterative testing of a compartmental model.
  • Inclusion of additional cell types and cross-regulatory mechanisms.
  • Fitting the developed model to existing biological data sets.

Main Results:

  • Existing models inadequately represent colon crypt cell fate dynamics.
  • The developed model incorporates feedback and cross-regulatory mechanisms.
  • Model fitting suggests cross-talk between cell types is crucial for colon crypt cycle dynamics.

Conclusions:

  • Enhanced compartmental models are necessary for accurately simulating colon crypts.
  • Cross-talk between cell types is a key feature in colon crypt cycle regulation.
  • This improved modeling approach advances understanding of colorectal cancer development.