Related Experiment Video
Updated: Aug 13, 2026
08:57
Generating and Imaging Mouse and Human Epithelial Organoids from Normal and Tumor Mammary Tissue Without Passaging
Published on: November 11, 2022
Epithelial tissue architecture protects against cancer
Natalia L Komarova1, Philip C Myint2
1Department of Mathematics, University of California - Irvine, Irvine, CA 92697, United States; Department of Ecology and Evolution, University of California - Irvine, Irvine, CA 92697, United States.
Mathematical Biosciences
|January 24, 2006
Summary
Colon crypt design impacts cancer risk. Optimal stem cell numbers depend on mutation rates, with strategies shifting from minimizing cancer in youth to potentially increasing risk with age, linking cancer and aging.
Area of Science:
- Evolutionary biology
- Cancer research
- Mathematical modeling
Background:
- Colon crypts are crucial for tissue homeostasis.
- Understanding crypt design can inform cancer prevention strategies.
- Stochastic processes influence cellular mutation accumulation.
Purpose of the Study:
- To model colon crypt design for minimizing cancerous mutations.
- To determine evolutionarily advantageous crypt structures based on mutation rates.
- To investigate the relationship between aging, cancer, and crypt design.
Main Methods:
- Development of a stochastic mathematical model.
- Analysis of a finite branching process.
- Simulation of mutation accumulation dynamics in crypts.
Main Results:
- Optimal stem cell number per crypt varies with mutation rates.
- High stem cell counts are favored when stem cell mutation rates are low.
- Low stem cell counts are favored when stem cell mutation rates are high.
- Age-dependent trade-offs exist: early cancer protection vs. later increased risk.
- The model links cancer initiation rates to organismal aging.
Conclusions:
- Colon crypt design is shaped by evolutionary pressures to minimize cancer risk.
- Mutation rate dynamics dictate optimal stem cell populations.
- Cancer and aging are intertwined, with evolutionary strategies having age-specific consequences.
More Related Videos
Related Concept Videos
01:23Epithelial Tissues and Their Functions
Epithelial tissues are large sheets of cells covering all of the surfaces of the body. These surfaces can be internal or external, for example, skin, airways, the digestive tract, the urinary system, and the reproductive system. Hollow organs and body cavities that do not connect to the body's exterior, including blood vessels and serous membranes, are lined by epithelial tissue known as the endothelium.
Epithelial tissues provide the body's first line of protection from physical, chemical, and...
Epithelial tissues provide the body's first line of protection from physical, chemical, and...
01:22Classification of Epithelial Tissues: Overview
Epithelial tissues are classified according to the shape of the cells and the number of cell layers formed. Cell shapes can be squamous (flattened and thin), cuboidal (square-like, as wide as it is tall), or columnar (rectangular, taller than it is wide). Additionally, the nucleus shape helps identify the type of epithelial cells. Squamous cells have flattened disc-shaped nuclei, cuboidal cells have spherical nuclei, and columnar cells have elongated nuclei.
Based on the number of cell layers,...
Based on the number of cell layers,...
01:30Classification of Epithelial Tissues: Simple Epithelium
Simple epithelium consists of a single layer of cells that lines body cavities and blood vessels. The shape of the cells in the epithelium reflects the function of the tissue. Cells in simple squamous epithelium appear as thin scales with flat, elliptical nuclei that mirror the form of the cell.
Because of the thinness of the cells, simple squamous epithelium is present where the rapid passage of chemical compounds is observed. For example, the endothelium that lines the capillaries and vessels...
Because of the thinness of the cells, simple squamous epithelium is present where the rapid passage of chemical compounds is observed. For example, the endothelium that lines the capillaries and vessels...
01:29Classification of Epithelial Tissues: Stratified Epithelium
Stratified epithelium consists of several stacked layers of cells. They provide the durability to withstand constant physical and chemical attacks. Stratified epithelium is named after the shape of the most apical layer of cells. Stratified squamous epithelium is the most common type found in the human body. In this tissue, the apical cells are squamous, whereas the basal layer contains either columnar or cuboidal cells. The basal cells divide to form new daughter cells, which gradually become...
01:19Cadherins in Tissue Organization
The cadherins are a superfamily of cell adhesion molecules comprising over 180 variants, with specific tissues expressing a particular combination of cadherin types. Cadherins generally exhibit homophilic binding; i.e., cadherins on one cell bind to cadherins of the same or closely related type on another cell. Thus, cells of the same type have a specific affinity to bind to each other and sort themselves into clusters to form tissues.
Cell Sorting During Development
Cell sorting plays an...
Cell Sorting During Development
Cell sorting plays an...
01:20Classification of Epithelial Tissues: Glandular Epithelium
The glandular epithelium is made of one or more epithelial cells modified to synthesize and secrete chemical substances. Glandular epithelia can be classified based on cell number. Unicellular glands have individual secretory cells scattered across the epithelial monolayer. In contrast, multicellular glands consist of a hollow tubular duct attached to the cluster of secretory cells located in the deep pockets.
Multicellular glands are formed during early development when epithelial budding...
Multicellular glands are formed during early development when epithelial budding...