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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Deluca, Hector F. Meehan, Terrence F. |
| Description | Author Affiliation: Meehan TF ( Department of Biochemistry, University of Wisconsin, College of Agricultural and Life Sciences, Madison, WI 53706, USA.); |
| Abstract | In addition to its role in calcium and phosphorous homeostasis, 1 alpha,25-dihydroxyvitamin D(3) [1,25-(OH)(2)D(3)] appears to be a modulator of the immune system. Administration of 1,25-(OH)(2)D(3) prevents disease in several autoimmune animal models, including experimental autoimmune encephalomyelitis (EAE). The vitamin D receptor is believed to mediate this activity. Among cells of the immune system, CD8(+) T cells have the highest levels of the vitamin D receptor. Because CD8(+) T cells have been implicated as both suppressors and effectors of the inflammation associated with multiple sclerosis and EAE, we examined the question of whether the 1,25-(OH)(2)D(3) suppression of EAE occurs through a CD8(+) T cell-dependent mechanism. To test this hypothesis, mice that are homozygous knockouts for the alpha chain of the CD8 receptor and have been characterized as lacking functional CD8(+) T cells (CD8(+) -/-) were provided 1,25-(OH)(2)D(3) in their diet before EAE induction. Although CD8(+) -/- mice fed the same diet lacking 1,25-(OH)(2)D(3) have a high incidence of EAE, EAE did not occur in CD8(+) -/- mice fed the diet containing 1,25-(OH)(2)D(3). We conclude that CD8(+) T cells neither are needed nor do they play a role in the prevention of EAE by 1,25-(OH)(2)D(3). |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 99 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2002-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | CD8-Positive T-Lymphocytes Metabolism Calcitriol Encephalomyelitis, Autoimmune, Experimental Immunology Prevention & Control Animals Flow Cytometry Immunosuppressive Agents Pharmacology Mice Mice, Knockout Microscopy, Fluorescence Time Factors Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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