The Journal of Experimental Medicine
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Published online 6 June 1999.
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© The Rockefeller University Press, 0022-1007/2000/6/2011/ $5.00
The Journal of Experimental Medicine, Volume 191, Number 11, June 5, 2000 2011-2020


Original Article

CD40–CD40 Ligand Interactions In Vivo Regulate Migration of Antigen-bearing Dendritic Cells from the Skin to Draining Lymph Nodes

Angus M. Moodycliffea, Vijay Shreedharc, Stephen E. Ullricha, Jeffrey Walterscheida, Corazon Bucanab, Margaret L. Kripkea, and Leopoldo Flores-Romoa
a Department of Immunology-178, M.D. Anderson Cancer Center, Houston, Texas 77030
b Department of Cancer Biology-173, M.D. Anderson Cancer Center, Houston, Texas 77030
c GI Research Laboratory, Harvard Medical School, Boston, Massachusetts 02115

Correspondence to: Leopoldo Flores-Romo, c/o Ms. Sue Adams, Dept. of Immunology-178, M.D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030. Tel:713-792-8380 Fax:713-745-1633 E-mail:sadams{at}notes.mdacc.tmc.edu.

Whereas CD40–CD40 ligand interactions are important for various dendritic cell (DC) functions in vitro, their in vivo relevance is unknown. We analyzed the DC status of CD40 ligand -/- mice using a contact hypersensitivity (CHS) model system that enables multiple functions of DCs to be assessed in vivo. Immunohistochemistry of skin sections revealed no differences in terms of numbers and morphology of dendritic epidermal Langerhans cells (LCs) in unsensitized CD40 ligand -/- mice as compared with wild-type C57BL/6 mice. However, after contact sensitization of CD40 ligand -/- mice, LCs failed to migrate out of the skin and substantially fewer DCs accumulated in draining lymph nodes (DLNs). Furthermore, very few antigen-bearing DCs could be detected in the paracortical region of lymph nodes draining sensitized skin. This defect in DC migration after hapten sensitization was associated with defective CHS responses and decreased cutaneous tumor necrosis factor (TNF)-{alpha} production and was corrected by injecting recombinant TNF-{alpha} or an agonistic anti-CD40 monoclonal antibody. Thus, CD40–CD40 ligand interactions in vivo regulate the migration of antigen-bearing DCs from the skin to DLNs via TNF-{alpha} production and play a vital role in the initiation of acquired T cell–mediated immunity.

Key Words: Langerhans cells, epidermis, TNF-{alpha}, contact hypersensitivity, acquired immunity


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