title: Nuclear factor kappa B is required for the development of marginal zone B lymphocytes.
abstract: Although immunoglobulin (Ig)M(hi)IgD(lo/-)CD21(hi) marginal zone B cells represent a significant proportion of naive peripheral splenic B lymphocytes, few of the genes that regulate their development have been identified. This subset of peripheral B cells fails to emerge in mice that lack nuclear factor (NF)-kappa Bp50. Less drastic reductions in marginal zone B cell numbers are also seen in the spleens of recombination activating gene (Rag)-2(-/-) mice reconstituted with NF-kappa Bp65(-/-) fetal liver cells and in c-Rel(-/-) mice. In contrast, steady-state levels of IgD(hi) splenic follicular B cells are not significantly reduced in the absence of NF-kappa Bp50, NF-kappa Bp65, or c-Rel. Reconstitution of B cells in Rag-2(-/-) mice with a mixture of p50(-/-)/p65(-/-) fetal liver cells and Rag-2(-/-) bone marrow cells revealed that the generation of marginal zone B cells requires the expression of NF-kappa B in developing B cells, as opposed to supporting cells.
authors.affiliation: Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, Massachusetts 02129, USA.
authors.forename: A
authors.initials: A
authors.lastname: Cariappa
authors.forename: H C
authors.initials: HC
authors.lastname: Liou
authors.forename: B H
authors.initials: BH
authors.lastname: Horwitz
authors.forename: S
authors.initials: S
authors.lastname: Pillai
mesh_terms: D000818:Animals; D000944:Antigens, Differentiation, B-Lymphocyte / Q000032:analysis; D001402:B-Lymphocytes / Q000276:immunology / Q000502:physiology*; D001854:Bone Marrow Cells / Q000166:cytology / Q000502:physiology; D004268:DNA-Binding Proteins / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D007075:Immunoglobulin M / Q000032:analysis; D016130:Immunophenotyping; D008099:Liver / Q000196:embryology / Q000378:metabolism; D051379:Mice; D018345:Mice, Knockout; D016328:NF-kappa B / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D052002:NF-kappa B p50 Subunit; D020569:Proto-Oncogene Proteins c-rel / Q000378:metabolism; D051996:Transcription Factor RelA
chemical_list: D000944:Antigens, Differentiation, B-Lymphocyte; D004268:DNA-Binding Proteins; D007075:Immunoglobulin M; D016328:NF-kappa B; D052002:NF-kappa B p50 Subunit; D020569:Proto-Oncogene Proteins c-rel; C499308:Rag2 protein, mouse; D051996:Transcription Factor RelA; C064655:V(D)J recombination activating protein 2