Journal
NATURE IMMUNOLOGY
Volume 13, Issue 7, Pages 681-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ni.2309
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Funding
- University of Rochester
- National Institute of Allergy and Infectious Diseases of the US National Institutes of Health [AI068056, AI078907, AI061511]
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Although cognate encounters between antigen-bearing dendritic cells (DCs) that express the chemokine receptor CCR7 and CCR7(+) naive T cells take place in the T cell zone of lymph nodes, it is unknown whether the colocalization of DCs and T cells in the T cell area is required for the generation of effector cells. Here we found that after infection with an intestinal nematode, antigen-bearing DCs and CD4(+) T cells upregulated the chemokine receptor CXCR5 and localized together outside the T cell zone by a mechanism dependent on the chemokine CXCL13, B cells and lymphotoxin. Notably, lymphotoxin-expressing B cells, CXCR5-expressing DCs and T cells, and CXCL13 were also necessary for development of interleukin 4 (IL-4)-producing type 2 helper T cells (T(H)2 cells), which suggests that T(H)2 differentiation can initiate outside the T cell zone.
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