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Immunoglobulins drive terminal maturation of splenic dendritic cells.

ABSTRACT: Nature and physiological status of antigen-presenting cells, such as dendritic cells DCs, are decisive for the immune reactions elicited. Multiple factors and cell interactions have been described that affect maturation of DCs. Here, we show that DCs arising in the absence of immunoglobulins (Ig) in vivo are impaired in cross-presentation of soluble antigen. This deficiency was due to aberrant cellular targeting of antigen to lysosomes and its rapid degradation. Function of DCs could be restored by transfer of Ig irrespective of antigen specificity and isotype. Modulation of cross-presentation by Ig was inhibited by coapplication of mannan and, thus, likely to be mediated by C-type lectin receptors. This unexpected dependency of splenic DCs on Ig to cross-present antigen provides insights into the interplay between cellular and humoral immunity and the immunomodulatory capacity of Ig.

SUBMITTER: Zietara N 

PROVIDER: S-EPMC3568358 | biostudies-literature | 2013 Feb

REPOSITORIES: biostudies-literature

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Immunoglobulins drive terminal maturation of splenic dendritic cells.

Zietara Natalia N   Łyszkiewicz Marcin M   Puchałka Jacek J   Pei Gang G   Gutierrez Maximiliano Gabriel MG   Lienenklaus Stefan S   Hobeika Elias E   Reth Michael M   Martins dos Santos Vitor A P VA   Krueger Andreas A   Weiss Siegfried S  

Proceedings of the National Academy of Sciences of the United States of America 20130123 6

Nature and physiological status of antigen-presenting cells, such as dendritic cells DCs, are decisive for the immune reactions elicited. Multiple factors and cell interactions have been described that affect maturation of DCs. Here, we show that DCs arising in the absence of immunoglobulins (Ig) in vivo are impaired in cross-presentation of soluble antigen. This deficiency was due to aberrant cellular targeting of antigen to lysosomes and its rapid degradation. Function of DCs could be restored  ...[more]

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