Document Detail

TLR9 drives the development of transitional B cells towards the marginal zone pathway and promotes autoimmunity.
MedLine Citation:
PMID:  22695187     Owner:  NLM     Status:  Publisher    
Maturation of B cells depends on environmental stimuli. Peripheral immature B cells develop into follicular pathway when antigenic stimulation is combined with T cell signals. Here, we wished to identify stimuli contributing to the development into marginal zone B cells known to be involved in autoimmune response. We found that TLR9 stimulation of transitional B cells induces proliferation and specific maturation into CD24(-) CD38(+) CD21(high) CD23(low) IgM(high) IgD(low) and Notch2(high) B cells characteristics of marginal zone B cells. Terminal differentiation into antibody-secreting cell associated with isotype switch commitment is also triggered which leads to a striking production of autoantibodies. Interestingly, mature B cells do not differentiate into marginal zone pathway following TLR9 stimulation, nor do transitional B cells under antigenic and T cell combined signals. These results suggest that transitional B cells are specifically sensitive to TLR9 stimulation to produce autoreactive marginal zone B cells.
Thomas Guerrier; Pierre Youinou; Jacques-Olivier Pers; Christophe Jamin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-11
Journal Detail:
Title:  Journal of autoimmunity     Volume:  -     ISSN:  1095-9157     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8812164     Medline TA:  J Autoimmun     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
EA2216 Immunologie et Pathologie, IFR148 ScInBioS, Université de Brest et Université Européenne de Bretagne, Brest, France.
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