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- Bäcklund, Johan, et al.
(author)
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Glycosylation of type II collagen is of major importance for T cell tolerance and pathology in collagen-induced arthritis.
- 2002
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In: European Journal of Immunology. - 1521-4141. ; 32:12, s. 3776-3784
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Journal article (peer-reviewed)abstract
- Type II collagen (CII) is a candidate cartilage-specific autoantigen, which can become post-translationally modified by hydroxylation and glycosylation. T cell recognition of CII is essential for the development of murine collagen-induced arthritis (CIA) and also occurs in rheumatoid arthritis (RA). The common denominator of murine CIA and human RA is the presentation of an immunodominant CII-derived glycosylated peptide on murine Aq and human DR4 molecules, respectively. To investigate the importance of T cell recognition of glycosylated CII in CIA development after immunization with heterologous CII, we treated neonatal mice with different heterologous CII-peptides (non-modified, hydroxylated and galactosylated). Treatment with the galactosylated peptide (galactoseat position 264) was superior in protecting mice from CIA. Protection was accompanied by a reduced antibody response to CII and by an impaired T cell response to the glycopeptide. To investigate the importance of glycopeptide recognition in an autologous CIA model, we treated MMC-transgenic mice, which express the heterologous CII epitope with a glutamic acid in position 266 in cartilage, with CII-peptides. Again, a strong vaccination potential of the glycopeptide was seen. Hence CII-glycopeptides may be the optimal choice of vaccination target in RA, since humans share the same epitope as the MMC mouse
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| 4. |
- Teige, Anna, et al.
(author)
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CD1-dependent regulation of chronic central nervous system inflammation in experimental autoimmune encephalomyelitis.
- 2004
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In: Journal of Immunology. - 1550-6606. ; 172:1, s. 186-194
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Journal article (peer-reviewed)abstract
- The existence of T cells restricted for the MHC I-like molecule CD1 is well established, but the function of these cells is still obscure; one implication is that CD1-dependent T cells regulate autoimmunity. In this study, we investigate their role in experimental autoimmune encephalomyelitis (EAE), an animal model for multiple sclerosis, using CD1-deficient mice on a C57BL/6 background. We show that CD1-/- mice develop a clinically more severe and chronic EAE compared with CD1+/+ C57BL/6 mice, which was histopathologically confirmed with increased demyelination and CNS infiltration in CD1-/- mice. Autoantigen rechallenge in vitro revealed similar T cell proliferation in CD1+/+ and CD1-/- mice but an amplified cytokine response in CD1-/- mice as measured by both the Th1 cytokine IFN-{gamma} and the Th2 cytokine IL-4. Investigation of cytokine production at the site of inflammation showed a CNS influx of TGF-{beta}1-producing cells early in the disease in CD1+/+ mice, which was absent in the CD1-/- mice. Passive transfer of EAE using an autoreactive T cell line induced equivalent disease in both groups, which suggested additional requirements for activation of the CD1-dependent regulatory pathway(s). When immunized with CFA before T cell transfer, the CD1-/- mice again developed an augmented EAE compared with CD1+/+ mice. We suggest that CD1 exerts its function during CFA-mediated activation, regulating development of EAE both through enhancing TGF-{beta}1 production and through limiting autoreactive T cell activation, but not necessarily via effects on the Th1/Th2 balance.
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