Abstract:
:Memory B cells are at the center of longstanding controversies regarding the presence of antigen for their survival and their re-engagement in germinal centers after secondary challenge. Using a new mouse model of memory B cell labeling dependent on the cytidine deaminase AID, we show that after immunization with a particulate antigen, B cell memory appeared in several subsets, comprising clusters of immunoglobulin M-positive (IgM(+)) and IgG1(+) B cells in germinal center-like structures that persisted up to 8 months after immunization, as well as IgM(+) and IgG1(+) B cells with a memory phenotype outside of B cell follicles. After challenge, the IgG subset differentiated into plasmocytes, whereas the IgM subset reinitiated a germinal center reaction. This model, in which B cell memory appears in several layers with different functions, reconciles previous conflicting propositions.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Dogan I,Bertocci B,Vilmont V,Delbos F,Mégret J,Storck S,Reynaud CA,Weill JCdoi
10.1038/ni.1814subject
Has Abstractpub_date
2009-12-01 00:00:00pages
1292-9issue
12eissn
1529-2908issn
1529-2916pii
ni.1814journal_volume
10pub_type
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