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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kourepini, Evangelia Alissafi, Themis Panoutsakopoulou, Vily Paschalidis, Nikolaos Simoes, Davina C. M. Aggelakopoulou, Maria |
| Description | Author Affiliation: Kourepini E ( Laboratory of Cellular Immunology, Center for Basic Research I, Biomedical Research Foundation of the Academy of Athens, 115 27 Athens, Greece.); |
| Abstract | Intestinal CD103(-) dendritic cells (DCs) are pathogenic for colitis. Unveiling molecular mechanisms that render these cells proinflammatory is important for the design of specific immunotherapies. In this report, we demonstrated that mesenteric lymph node CD103(-) DCs express, among other proinflammatory cytokines, high levels of osteopontin (Opn) during experimental colitis. Opn expression by CD103(-) DCs was crucial for their immune profile and pathogenicity, including induction of T helper (Th) 1 and Th17 cell responses. Adoptive transfer of Opn-deficient CD103(-) DCs resulted in attenuated colitis in comparison to transfer of WT CD103(-) DCs, whereas transgenic CD103(-) DCs that overexpress Opn were highly pathogenic in vivo. Neutralization of secreted Opn expressed exclusively by CD103(-) DCs restrained disease severity. Also, Opn deficiency resulted in milder disease, whereas systemic neutralization of secreted Opn was therapeutic. We determined a specific domain of the Opn protein responsible for its CD103(-) DC-mediated proinflammatory effect. We demonstrated that disrupting the interaction of this Opn domain with integrin 9, overexpressed on colitic CD103(-) DCs, suppressed the inflammatory potential of these cells in vitro and in vivo. These results add unique insight into the biology of CD103(-) DCs and their function during inflammatory bowel disease. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 9 |
| Volume Number | 111 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2014-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Colitis Immunology Dendritic Cells Metabolism Osteopontin Adoptive Transfer Animals Antibodies, Neutralizing Antigens, CD Physiopathology DNA Primers Genetics Flow Cytometry Integrin Alpha Chains Deficiency Integrins Lymph Nodes Mice Mice, Inbred C57BL Protein Structure, Tertiary Reverse Transcriptase Polymerase Chain Reaction Trinitrobenzenesulfonic Acid Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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