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Multiple Cell Lineages Give Rise to a Cell Type.

Hisato Kondoh1,2

  • 1Osaka University, Suita, Osaka, Japan.

Results and Problems in Cell Differentiation
|March 21, 2024
PubMed
Summary

Developmental biology challenges the old cell lineage model. Multiple cell lineages can form the same cell types, revising our understanding of cell differentiation and development.

Area of Science:

  • Developmental Biology
  • Cell Biology
  • Epigenetics

Background:

  • Traditional view: Cell types arise from stepwise specification along distinct cell lineages.
  • Emerging evidence: Multiple, even distant, cell lineages can contribute to the same cell type.
  • Need for revised models of developmental cell regulation.

Purpose of the Study:

  • To challenge the dogma of strict cell lineage determination in development.
  • To present evidence for flexible developmental pathways.
  • To revise the understanding of how cell types are formed during development.

Main Methods:

  • Review and discussion of four distinct examples illustrating flexible developmental pathways.
  • Analysis of skeletal muscle, lens, blood, and neural tissue development.

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  • Focus on transcriptional regulation, transcription factors, intersectional pathways, and epigenetic regulation.

    • Main Results:

    • Skeletal muscle development involves precursors with varied transcriptional histories.
    • Lens cells develop from disparate lineages but share core transcription factors.
    • Blood cell development utilizes intersectional regulatory pathways.
    • Neural tissue can arise from cardiac precursors via epigenetic manipulation.

    Conclusions:

    • Developmental cell regulation is more flexible and less lineage-dependent than previously assumed.
    • The examples demonstrate that cell fate can be achieved through multiple, non-linear pathways.
    • This fundamentally revises the traditional model of development relying solely on fixed cell lineages.