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Regulatory B cells inhibit EAE initiation in mice while other B cells promote disease progression
Takashi Matsushita, … , Manabu Fujimoto, Thomas F. Tedder
Takashi Matsushita, … , Manabu Fujimoto, Thomas F. Tedder
Published September 18, 2008
Citation Information: J Clin Invest. 2008;118(10):3420-3430. https://doi.org/10.1172/JCI36030.
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Research Article

Regulatory B cells inhibit EAE initiation in mice while other B cells promote disease progression

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Abstract

EAE is a mouse T cell–mediated autoimmune disease of the CNS used to model the human condition MS. The contributions of B cells to EAE initiation and progression are unclear. In this study, we have shown that EAE disease initiation and progression are differentially influenced by the depletion of B cells from mice with otherwise intact immune systems. CD20 antibody–mediated B cell depletion before EAE induction substantially exacerbated disease symptoms and increased encephalitogenic T cell influx into the CNS. Increased symptom severity resulted from the depletion of a rare IL-10–producing CD1dhiCD5+ regulatory B cell subset (B10 cells), since the adoptive transfer of splenic B10 cells before EAE induction normalized EAE in B cell–depleted mice. While transfer of regulatory B10 cells was maximally effective during early EAE initiation, they had no obvious role during disease progression. Rather, B cell depletion during EAE disease progression dramatically suppressed symptoms. Specifically, B cells were required for the generation of CD4+ T cells specific for CNS autoantigen and the entry of encephalitogenic T cells into the CNS during disease progression. These results demonstrate reciprocal regulatory roles for B cells during EAE immunopathogenesis. The therapeutic effect of B cell depletion for the treatment of autoimmunity may therefore depend on the relative contributions and the timing of these opposing B cell activities during the course of disease initiation and pathogenesis.

Authors

Takashi Matsushita, Koichi Yanaba, Jean-David Bouaziz, Manabu Fujimoto, Thomas F. Tedder

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