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Related Concept Videos

Cellular Differentiation00:57

Cellular Differentiation

How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
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Cell Diversity01:13

Cell Diversity

The concept of a cell started with microscopic observations of dead cork tissue by Robert Hooke in 1665. Hooke coined the term "cell" based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. About ten years later, Antonie van Leeuwenhoek became the first person to observe the living and moving cells under a microscope. In the century that followed, the theory that cells represented the basic unit of life developed.
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Forced Transdifferentiation01:28

Forced Transdifferentiation

Transdifferentiation, also known as lineage reprogramming, was first discovered by Selman and Kafatos in 1974 in silkmoths. They observed that the moths’ cuticle-producing cells transformed into salt-producing cells. Many such cases of natural transdifferentiation occur in organisms. In humans, pancreatic alpha cells can become beta cells. In newts, the loss of the eye’s lens causes the pigmented epithelial cells to transdifferentiate into the lens cells.
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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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iPS Cell Differentiation

The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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Lineage Commitment

Commitment is the  process whereby stem cells:

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A Live-cell Image-Based Machine Learning Strategy to Monitor Pluripotent Stem Cell Differentiation
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Multi-type branching models to describe cell differentiation programs.

Robert E Nordon1, Kap-Hyoun Ko, Ross Odell

  • 1Graduate School of Biomedical Engineering, University of New South Wales, Sydney 2052, Australia. r.nordon@unsw.edu.au

Journal of Theoretical Biology
|February 22, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces multi-type branching models to explain cell differentiation and inheritance. These models analyze cell development dynamics, offering a new approach for stem and progenitor cell research.

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Area of Science:

  • Stem cell biology
  • Developmental biology
  • Mathematical modeling

Background:

  • Cell type is determined by repression index and phenotype.
  • Cell differentiation involves complex inheritance patterns.
  • Existing models may not fully capture cell lineage dynamics.

Purpose of the Study:

  • To develop and apply multi-type branching processes for modeling cell proliferation and differentiation.
  • To analyze the inheritance of cell type during cell division.
  • To provide a framework for understanding stem and progenitor cell development.

Main Methods:

  • Utilized multi-type branching processes, including the Smith-Martin (MSM) and inheritance-modified MSM (IMSM) models.
  • Employed division tracking with CFDA-SE for human cord blood CD34(+) cells.
  • Applied live cell imaging for mouse granulocyte-macrophage progenitors.

Main Results:

  • The MSM model identified cell cycle length, CD34 antigen down-regulation, and apoptosis rates.
  • The IMSM model was estimated for mouse progenitor cells, incorporating generation time memory.
  • Multi-type branching models effectively describe cell differentiation dynamics at single and bulk scales.

Conclusions:

  • Multi-type branching models offer a robust framework for analyzing cell differentiation dynamics.
  • These models provide a new paradigm for the systematic study of stem and progenitor cell development.
  • The approach integrates cell type inheritance, cell cycle, and phenotype into a unified model.