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Related Experiment Videos

Epigenetic mechanisms that regulate antigen receptor gene expression.

Yehudit Bergman1, Amanda Fisher, Howard Cedar

  • 1Department of Experimental Medicine and Cancer Research, PO Box 12272, Hebrew University, Jerusalem 91120, Israel. yberg@md.huji.ac.il

Current Opinion in Immunology
|March 14, 2003
PubMed
Summary

Generating functional immunoglobulin and T-cell receptor genes involves site-specific recombination of V, D, and J gene segments. Chromatin remodelling and locus positioning are crucial for regulating this essential immune system process.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • Functional immunoglobulin (Ig) and T-cell receptor (TCR) genes are essential for adaptive immunity.
  • These genes are assembled from variable (V), diversity (D), and joining (J) gene segments through V(D)J recombination.
  • Regulation of this process is critical for immune system development and function.

Purpose of the Study:

  • To summarize the current understanding of the regulatory mechanisms governing V(D)J recombination.
  • To highlight the role of chromatin structure and nuclear organization in antigen receptor gene assembly.
  • To emphasize the importance of ordered accessibility of gene segments for efficient recombination.

Main Methods:

  • Review of recent studies on V(D)J recombination.

Related Experiment Videos

  • Analysis of research on chromatin remodelling factors.
  • Investigation of findings related to nuclear positioning of Ig and TCR loci.

    • Main Results:

    • V(D)J recombination is a multi-step process requiring specific recombination machinery.
    • The availability of this machinery and the ordered accessibility of target gene segments are key regulatory factors.
    • Chromatin remodelling and the three-dimensional positioning of gene loci within the nucleus significantly influence gene expression and recombination efficiency.

    Conclusions:

    • Antigen receptor gene assembly is a tightly regulated process.
    • Chromatin dynamics and nuclear architecture play pivotal roles in controlling V(D)J recombination.
    • Understanding these mechanisms is vital for comprehending immune cell development and potential therapeutic interventions.