The Journal of Experimental Medicine
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Published online 13 March 2006 doi:10.1084/jem.20052016
Rockefeller University Press, 0022-1007 $8.00
JEM, Volume 203, Number 3, 519-527
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ARTICLE

Oral tolerance originates in the intestinal immune system and relies on antigen carriage by dendritic cells

Tim Worbs1, Ulrike Bode2, Sheng Yan3, Matthias W. Hoffmann3, Gabriele Hintzen1, Günter Bernhardt1, Reinhold Förster1, and Oliver Pabst1

1 Institute of Immunology, 2 Institute of Functional and Applied Anatomy, and 3 Department of Visceral and Transplantation Surgery, Hannover Medical School, 30625 Hannover, Germany

CORRESPONDENCE Oliver Pabst: Pabst.Oliver{at}mh-hannover.de

Oral tolerance induction is a key feature of intestinal immunity, generating systemic nonresponsiveness to ingested antigens. In this study, we report that orally applied soluble antigens are exclusively recognized in the intestinal immune system, particularly in the mesenteric lymph nodes. Consequently, the initiation of oral tolerance is impeded by mesenteric lymphadenectomy. Small bowel transplantation reveals that mesenteric lymph nodes require afferent lymph to accomplish the recognition of orally applied antigens. Finally, oral tolerance cannot be induced in CCR7-deficient mice that display impaired migration of dendritic cells from the intestine to the mesenteric lymph nodes, suggesting that immunologically relevant antigen is transported in a cell-bound fashion. These results demonstrate that antigen transport via afferent lymphatics into the draining mesenteric lymph nodes is obligatory for oral tolerance induction, inspiring new therapeutic strategies to exploit oral tolerance induction for the prevention and treatment of autoimmune diseases.


Abbreviations used: DTH, delayed type hypersensitivity; LP, lamina propria; MLN, mesenteric LNs; pLN, peripheral LN; PP, Peyer's patches.

R. Förster and O. Pabst contributed equally to this work.


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