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Related Experiment Videos

Ordered activation of the Ig lambda locus in Abelson B cell lines.

B Müller1, M Reth

  • 1Institute for Genetics, University of Cologne, Federal Republic of Germany.

The Journal of Experimental Medicine
|December 1, 1988
PubMed
Summary
This summary is machine-generated.

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Immunoglobulin lambda (Ig lambda) gene rearrangements in Abelson murine leukemia virus-transformed pre-B cells require kappa allele rearrangement. This suggests a specific sequence of immunoglobulin gene activation during B cell development.

Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • Abelson murine leukemia virus (A-MuLV) transformed pre-B cell lines are crucial models for studying immunoglobulin gene rearrangement.
  • The sequential rearrangement of immunoglobulin heavy and light chains dictates B cell development and antibody production.

Purpose of the Study:

  • To investigate the relationship between immunoglobulin kappa (Ig kappa) and immunoglobulin lambda (Ig lambda) light chain gene rearrangements in Abelson murine leukemia virus-transformed pre-B cells.
  • To determine the conditions under which V lambda gene assembly occurs.

Main Methods:

  • Analysis of Abelson line P8 subclones for L chain gene rearrangements.
  • Examination of V lambda gene assembly and recombining sequence (RS) element status on Ig kappa alleles.

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Main Results:

  • Two of seven analyzed clones successfully assembled their V lambda genes during in vitro culture.
  • V lambda gene rearrangement was observed exclusively in subclones that had rearranged or were rearranging their RS element on both Ig kappa alleles.

Conclusions:

  • Recombining sequence (RS) element rearrangements are preferentially initiated in kappa-negative (kappa-) pre-B cells.
  • The activation of the Ig lambda locus necessitates the deletion or inactivation of DNA sequences situated between the J kappa and RS elements.