Effect of different Ig transgenes on B cell differentiation in scid mice

Yung Chang, Melvin J. Bosma

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


In this study we show that the ability of bone marrow pre-B cells to differentiate into B cells in H/L chain transgenic scid mice correlates with the ability of the transgenes to inhibit initiation of endogenous κ gene rearrangement. Initiation of rearrangement was scored by assaying for DNA double-strand breaks (DSB) at the recombination signal/coding borders of J(κ)1 and J(κ)2. In H/L chain transgenic scid mice that develop B cells, we found little or no DSB; whereas in H chain only transgenic scid mice, in which pre-B cells are unable to give rise to B cells, we found a normal level of DSB but no VJ(κ) coding joints. As scid mice are deficient in the repair of DSB, we suggest that initiation of κ gene rearrangement in H chain transgenic scid mice causes B lineage cells to die at the late pre-B stage. In one transgenic scid line (Y-Sp6), which fails to generate B cells despite containing a H and L chain transgene, we found evidence for loss of B lineage cells at two stages of development: the pro-B to pre-B transitional stage and the late pre-B stage.

Original languageEnglish (US)
Pages (from-to)373-380
Number of pages8
JournalInternational Immunology
Issue number3
StatePublished - 1997


  • DNA double-strand breaks
  • L chain κ locus
  • V(D)J recombination

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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