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Related Experiment Videos

[Changes in chromatin organization during early development and carcinogenesis].

A Hair1, S V Razin, E S Vasetskiĭ

  • 1Gene Expression Group, School of Biological Sciences, University of Manchester, Stopford Building, Oxford Rd, Manchester M13 9PT.

Ontogenez
|April 24, 2002
PubMed
Summary

Chromatin loop domains expand during development and shrink during carcinogenesis, indicating a link between nuclear organization and cell differentiation. This review explores these dynamic changes in embryogenesis and cancer.

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[DNA Damage Response in Nucleoli].

Molekuliarnaia biologiia·2021

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Context:

  • Chromatin organization undergoes significant alterations during both normal development and the pathological process of carcinogenesis.
  • The nuclear matrix plays a crucial role in organizing chromatin structure, influencing gene regulation and DNA replication.
  • Changes in chromatin loop domain size, replicon size, and attachment to the nuclear matrix are key indicators of cellular state.

Purpose:

  • To review new experimental data on the organization of DNA fragments (DFNA) loops and the nuclear matrix.
  • To elucidate the relationship between chromatin organization, nuclear matrix attachment, and cellular processes like embryogenesis and carcinogenesis.
  • To understand the inverse changes in chromatin structure observed during neoplastic dedifferentiation.

Summary:

Related Experiment Videos

  • During development, chromatin loop domains increase in size (20 to ~200 kbp), accompanied by larger replicons and altered nuclear matrix attachment.
  • Carcinogenesis exhibits inverse changes, where neoplastic cells dedifferentiate, reverting to an earlier chromatin organization state.
  • The nuclear skeleton (matrix) and its interaction with DNA loops are central to these observed structural dynamics.

Impact:

  • Provides insights into the fundamental mechanisms of chromatin organization during development and disease.
  • Highlights potential biomarkers for early cancer detection based on nuclear matrix alterations.
  • Offers a framework for understanding cellular dedifferentiation in the context of chromatin structure.