PMID- 19305396 OWN - NLM STAT- MEDLINE DCOM- 20090605 LR - 20211020 IS - 1529-2916 (Electronic) IS - 1529-2908 (Linking) VI - 10 IP - 5 DP - 2009 May TI - C-C chemokine receptor 6-regulated entry of TH-17 cells into the CNS through the choroid plexus is required for the initiation of EAE. PG - 514-23 LID - 10.1038/ni.1716 [doi] AB - Interleukin 17-producing T helper cells (T(H)-17 cells) are important in experimental autoimmune encephalomyelitis, but their route of entry into the central nervous system (CNS) and their contribution relative to that of other effector T cells remain to be determined. Here we found that mice lacking CCR6, a chemokine receptor characteristic of T(H)-17 cells, developed T(H)-17 responses but were highly resistant to the induction of experimental autoimmune encephalomyelitis. Disease susceptibility was reconstituted by transfer of wild-type T cells that entered into the CNS before disease onset and triggered massive CCR6-independent recruitment of effector T cells across activated parenchymal vessels. The CCR6 ligand CCL20 was constitutively expressed in epithelial cells of choroid plexus in mice and humans. Our results identify distinct molecular requirements and ports of lymphocyte entry into uninflamed versus inflamed CNS and suggest that the CCR6-CCL20 axis in the choroid plexus controls immune surveillance of the CNS. FAU - Reboldi, Andrea AU - Reboldi A AD - Institute for Research in Biomedicine, Bellinzona, Switzerland. FAU - Coisne, Caroline AU - Coisne C FAU - Baumjohann, Dirk AU - Baumjohann D FAU - Benvenuto, Federica AU - Benvenuto F FAU - Bottinelli, Denise AU - Bottinelli D FAU - Lira, Sergio AU - Lira S FAU - Uccelli, Antonio AU - Uccelli A FAU - Lanzavecchia, Antonio AU - Lanzavecchia A FAU - Engelhardt, Britta AU - Engelhardt B FAU - Sallusto, Federica AU - Sallusto F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090322 PL - United States TA - Nat Immunol JT - Nature immunology JID - 100941354 RN - 0 (CCR6 protein, mouse) RN - 0 (Chemokine CCL20) RN - 0 (Interleukin-17) RN - 0 (Receptors, CCR6) SB - IM CIN - Nat Immunol. 2009 May;10(5):453-5. PMID: 19381137 MH - Animals MH - Cell Differentiation/immunology MH - Chemokine CCL20 MH - Chemotaxis, Leukocyte/immunology MH - Choroid Plexus/*immunology/metabolism MH - Encephalomyelitis, Autoimmune, Experimental/*immunology/metabolism MH - Female MH - Flow Cytometry MH - Fluorescent Antibody Technique MH - Humans MH - Immunohistochemistry MH - Immunologic Surveillance MH - Interleukin-17/*immunology/metabolism MH - Lymphocyte Activation/immunology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Mice, Transgenic MH - Multiple Sclerosis/immunology/metabolism MH - Receptors, CCR6/*immunology/metabolism MH - T-Lymphocytes, Helper-Inducer/cytology/*immunology/metabolism EDAT- 2009/03/24 09:00 MHDA- 2009/06/06 09:00 CRDT- 2009/03/24 09:00 PHST- 2008/11/04 00:00 [received] PHST- 2009/02/10 00:00 [accepted] PHST- 2009/03/24 09:00 [entrez] PHST- 2009/03/24 09:00 [pubmed] PHST- 2009/06/06 09:00 [medline] AID - ni.1716 [pii] AID - 10.1038/ni.1716 [doi] PST - ppublish SO - Nat Immunol. 2009 May;10(5):514-23. doi: 10.1038/ni.1716. Epub 2009 Mar 22.