The efficiency of B cell receptor (BCR) editing is dependent on BCR light chain rearrangement status

European Journal of Immunology
Nurit YachimovichDan Eilat

Abstract

Anti-DNA knock-in mice serve as models for studying B cell tolerance mechanisms to a ubiquitous antigen. We have constructed six strains of double transgenic (C57BL/6xBALB/c)F1 mice, each expressing an unmutated or somatically mutated anti-DNA heavy (H) chain, combined with one of three different light (L) chains, namely V(kappa)1-J(kappa)1, V(kappa)4-J(kappa)4 and V(kappa)8-J(kappa)5. In vitro analysis of the various Ig H/L chain combinations showed that all had a similar specificity for single-stranded DNA and double-stranded DNA, but that antibodies encoded by the mutated H chain had higher affinities for the autoantigen. None of the targeted mouse strains exhibited significant levels of serum anti-DNA activity. However, while B cells from mice carrying the V(kappa)1-J(kappa)1 transgenic L chains were tolerized almost exclusively by L chain receptor editing in an affinity-independent manner, the mice expressing V(kappa)8-J(kappa)5 L chains have utilized affinity-dependent clonal anergy as their sole mechanism of B cell tolerance. V(kappa)4-J(kappa)4 targeted mice exhibited an intermediate phenotype with respect to these two mechanisms of B cell tolerance. Our results suggest that receptor editing is the preferred mechanism o...Continue Reading

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Citations

Nov 25, 2003·Current Opinion in Immunology·Michele L Fields, Jan Erikson
Mar 14, 2003·Current Opinion in Immunology·David Nemazee, Kristin A Hogquist
Dec 30, 2009·International Immunology·Inbal KatDan Eilat
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May 25, 2004·Nature Immunology·Regina HalversonRoberta Pelanda
May 6, 2009·The Journal of Immunology : Official Journal of the American Association of Immunologists·Efi MakdasiDan Eilat
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