Antibody class switching differs among SJL, C57BL/6 and 129 mice

被引:24
|
作者
Kaminski, Denise A. [1 ]
Stavnezer, Janet [1 ]
机构
[1] Univ Massachusetts, Sch Med, Immunol & Virol Program, Dept Mol Genet & Microbiol, Worcester, MA 01655 USA
关键词
B cells; inbred mouse strains; isotype switch;
D O I
10.1093/intimm/dxm020
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Inbred mouse strains used for gene manipulation studies vary in many respects, including immune system function. These differences can interfere with data interpretation unless the mice are well backcrossed. Here, we show that antibody class switching to IgG3 in cultured splenic B cells from Swiss James Lambert (SJL) and 129/Sv mice is 2- to 6-fold less efficient compared with C57BL/6 (B6). Under optimal stimulation conditions, IgA switching is also 2- to 19-fold lower in SJL and 129/Sv B cells. Splenic B cells from SJL mice express higher levels of CD19 and CD21 compared with B6, and their CD21(high)CD23(low) B cells have little CD9 expression, suggesting atypical marginal zone (MZ) B cells. However, sort purification of splenic B cell subsets did not equalize in vitro class switching to IgG3 or IgA between SJL and B6. 129/Sv spleens have a 3-fold greater number of MZ B cells compared with B6, with similar CD9 expression. Poor IgG3 switching by 129/Sv B cells is specific to CD23(high) follicular B cells, whereas similar changes in IgA switching are seen in both CD21(high) and CD23(high) B cell subsets from 129/Sv. Therefore, the functions and phenotypes of mature B cells differ among three common strains of mice.
引用
收藏
页码:545 / 556
页数:12
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