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Related Concept Videos

Cell Migration01:09

Cell Migration

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Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
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Cell Migration01:19

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Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
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Chemotaxis and Direction of Cell Migration01:21

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Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
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Cytoskeletal Coordination in Cell Migration01:32

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A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
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Role of Myosin in Cell Migration01:18

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Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
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Gastrulation01:56

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Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
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Analysis of Cell Migration within a Three-dimensional Collagen Matrix
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Stem cells take the stairs.

Caroline Vissers1, Guo-Li Ming1,2,3, Hongjun Song4,2,3,5

  • 1From The Graduate Program of Biochemistry, Cellular, and Molecular Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205 and.

The Journal of Biological Chemistry
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Summary
This summary is machine-generated.

Researchers identified five distinct stages of human embryonic stem cell neural differentiation. Key transcription factor networks and intracellular signaling pathways define these critical steps toward neural fate commitment.

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Area of Science:

  • Developmental Biology
  • Stem Cell Biology
  • Neuroscience

Background:

  • Human embryonic stem cell (hESC) differentiation is crucial for understanding development and disease.
  • Neural differentiation involves complex, multi-stage processes that are not fully elucidated.
  • Distinguishing discrete stages is challenging, hindering a comprehensive understanding.

Purpose of the Study:

  • To comprehensively analyze transcriptome dynamics during hESC neural differentiation.
  • To identify and define discrete stages within the neural differentiation pathway.
  • To uncover the molecular mechanisms, including transcription factor networks and signaling pathways, governing these stages.

Main Methods:

  • Comprehensive transcriptome-wide analyses of hESC neural differentiation.
  • Bioinformatic approaches to identify distinct cellular stages based on gene expression profiles.
  • Analysis of transcription factor network connectivity and intracellular signaling pathway involvement.

Main Results:

  • Identification of five discrete stages during hESC neural differentiation.
  • Characterization of highly connected transcription factor networks linking sequential stages.
  • Discovery that the critical third stage for neural fate commitment is primarily regulated by intracellular signaling.

Conclusions:

  • The study provides a high-resolution map of hESC neural differentiation.
  • Transcription factor networks and intracellular signaling are key regulators of neural fate commitment.
  • Understanding these stages offers insights into developmental processes and potential therapeutic targets.