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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.
A zygote is a...
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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.
Differentiation of Common Myeloid Progenitor Cells01:15

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Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
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During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...

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Related Experiment Video

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Morphology-Based Distinction Between Healthy and Pathological Cells Utilizing Fourier Transforms and Self-Organizing Maps
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Modularity map of the network of human cell differentiation.

Viviane Galvão1, José G V Miranda, Roberto F S Andrade

  • 1Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, 44036-900, Feira de Santana, Bahia, Brazil.

Proceedings of the National Academy of Sciences of the United States of America
|March 12, 2010
PubMed
Summary

Researchers mapped the human cell differentiation network, revealing a critical branching law. This self-similar network organization shows hierarchical clusters of cell types, offering new insights into human development and organ function.

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Area of Science:

  • Developmental Biology
  • Systems Biology
  • Network Science

Background:

  • Cell differentiation is a complex process in multicellular organisms.
  • Understanding its mechanisms can be approached via reductionist or large-scale methods.
  • A large-scale approach can reveal global structure and unknown relations between cell types.

Purpose of the Study:

  • To construct the network of human cell differentiation (NHCD).
  • To analyze its organizational features and discover underlying dynamical laws.
  • To reveal hierarchical organization and relationships between cell types.

Main Methods:

  • Sorting and analyzing scattered data on human cell types and differentiation steps.
  • Constructing the NHCD with cell types as nodes and differentiation as links.
  • Applying network analysis to identify organizational patterns and dynamical laws.

Main Results:

  • Discovery of a dynamical law of critical branching in the NHCD.
  • Identification of self-similar regularity and modular organization across scales.
  • Observation of hierarchical clusters of cell types, forming sub-modules and super-modules of tissues and organs.

Conclusions:

  • The NHCD exhibits a hierarchical and modular organization governed by critical branching.
  • This framework allows viewing cell function development within the context of the entire human development network.
  • Results reveal integrated, large-scale connections between previously unrelated organ functions.