Journal
AMERICAN JOURNAL OF PATHOLOGY
Volume 170, Issue 6, Pages 2001-2008Publisher
AMER SOC INVESTIGATIVE PATHOLOGY, INC
DOI: 10.2353/ajpath.2007.061016
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Funding
- NCRR NIH HHS [R01 RR017009, RR 017009] Funding Source: Medline
- NIGMS NIH HHS [GM 08111-18, S06 GM008111] Funding Source: Medline
- NINDS NIH HHS [R01 NS046032] Funding Source: Medline
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p150/95 (CD11c/CD18, CR4) is a member of the O-2-integrin family of adhesion molecules and is considered an important phagocytic receptor. The role of p150/95 in the development of central nervous system demyelinating diseases, including multiple sclerosis, remains unexplored. To determine p150/95mediated mechanisms in experimental autoimmune encephalomyelitis (EAE), we performed EAE using CD11c-deficient (CD11c(-/-)) mice. EAE in CD11c(-/-) mice was significantly attenuated and characterized by markedly reduced spinal cord T-cell infiltration and interferon-gamma production by these cells. Adoptive transfer of antigen-restimulated T cells from wildtype to CD11c(-/-) mice produced significantly attenuated EAE, whereas transfer of CD11c(-/-) antigen-restimulated T cells to control mice induced a very mild, monophasic EAE. T cells from MOG(35-55) peptide-primed CD11c(-/-) mice displayed an unusual cytokine phenotype with elevated levels of interleukin (IL)-2, IL-4, and IL-12 but reduced levels of interferon-gamma, tumor necrosis factor-alpha, IL-10, IL-17, and transforming growth factor-P compared with control mice. Overall, CD11c(-/-) T cells from primed mice proliferated comparably to that of control T cells on MOG(35-55) restimulation. Our results indicate that expression of p150/95 is critical on both T cells as well as other leukocytes for the development of demyelinating disease and may represent a novel therapeutic target for multiple sclerosis.
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