Dual isotype expressing B cells [κ(+)/λ(+)] arise during the ontogeny of B cells in the bone marrow of normal nontransgenic mice

被引:19
作者
Rezanka, LJ
Kenny, JJ
Longo, DL
机构
[1] NIA, Immunol Lab, NIH, Baltimore, MD 21224 USA
[2] Beth Israel Deaconess Med Ctr, Boston, MA 02215 USA
关键词
rodent; B cells; antibodies; autoantibodies; repertoire development;
D O I
10.1016/j.cellimm.2005.12.004
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Central to the clonal selection theory is the tenet that a single B cell expresses a single receptor with a single specificity. Previously, based on our work in anti-phosphocholine transgenic mouse models, we suggested that B cells escaped clonal deletion by coexpression of more than one receptor on their cell surface. We argued that '' receptor dilution '' was necessary when: (i) the expressed immunoglobulin receptor is essential for immune protection against pathogens and (ii) this protective receptor is autoreactive and would be clonally deleted, leaving a hole in the B cell repertoire. Here, we demonstrate that dual isotype expressing B cells arise during the normal ontogeny of B cells in the bone marrow and populate both the spleen and peritoneal cavity of nontransgenic mice. Furthermore, single cell analysis of the expressed immunoglobulin light chains suggests that receptor editing may play a role in the generation of a significant fraction of dual isotype expressing B cells. Published by Elsevier Inc.
引用
收藏
页码:38 / 48
页数:11
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