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Related Concept Videos

Cellular Differentiation00:57

Cellular Differentiation

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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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Forced Transdifferentiation01:28

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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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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...
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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.
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In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
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Bending toward differentiation.

Caterina Tomba1, Aurélien Roux2

  • 1Université de Lyon, CNRS, INSA Lyon, Ecole Centrale de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, INL, UMR5270, 69622 Villeurbanne, France.

Developmental Cell
|December 7, 2021
PubMed
Summary
This summary is machine-generated.

Epithelial folding directly impacts nuclear shape and gene expression, revealing a new layer of mechanical signaling in organ development. This study highlights how physical forces influence cellular processes critical for forming functional organs.

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Area of Science:

  • Developmental biology
  • Cell biology
  • Biophysics

Background:

  • Organ formation relies on coordinated biochemical and mechanical signals.
  • Processes like tissue folding, cell shape, and differentiation are tightly regulated.
  • The interplay between physical forces and cellular behavior is crucial for development.

Purpose of the Study:

  • To investigate the direct consequences of epithelial monolayer folding on nuclear shape.
  • To determine the impact of epithelial folding on gene expression.
  • To elucidate the role of mechanical cues in regulating nuclear architecture and gene regulation during organogenesis.

Main Methods:

  • Utilized advanced microscopy techniques to observe epithelial monolayer folding.
  • Employed quantitative image analysis to measure nuclear shape changes.
  • Performed gene expression analysis to assess the impact of folding on transcriptional programs.

Main Results:

  • Demonstrated a direct correlation between epithelial monolayer folding and alterations in nuclear shape.
  • Identified specific changes in nuclear morphology induced by mechanical stress during folding.
  • Showed that epithelial folding influences gene expression patterns, linking mechanical signals to transcriptional outcomes.

Conclusions:

  • Epithelial monolayer folding is a significant mechanical cue that directly shapes nuclear morphology.
  • Nuclear shape changes induced by folding can modulate gene expression during organ development.
  • This study establishes a novel mechanical signaling pathway influencing organogenesis through physical forces acting on the nucleus.