Immunoglobulins drive terminal maturation of splenic dendritic cells.
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.
Department of Molecular Immunology, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany. zietara.natalia@mh-hannover.de
Natalia
N
Zietara
Marcin
M
Łyszkiewicz
Jacek
J
Puchałka
Gang
G
Pei
Maximiliano Gabriel
MG
Gutierrez
Stefan
S
Lienenklaus
Elias
E
Hobeika
Michael
M
Reth
Vitor A P
VA
Martins dos Santos
Andreas
A
Krueger
Siegfried
S
Weiss
D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D002454:Cell Differentiation; D045142:Cross-Priming; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D005260:Female; D007136:Immunoglobulins / Q000378:metabolism*; D037181:Lectins, C-Type / Q000378:metabolism; D008231:Lymphopenia / Q000276:immunology / Q000473:pathology; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D013154:Spleen / Q000166:cytology / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology
D007136:Immunoglobulins; D037181:Lectins, C-Type