| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2017: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2016: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2015: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Outline of Final Research Achievements |
B cells can suppress autoimmunity by secreting interleukin-10 (IL-10). Although subpopulations of splenic B lineage cells are reported to express IL- 10 in vitro, the identity of IL-10-producing B cells with regulatory function in vivo remains unknown. By using IL-10 reporter mice, we found that plasmablasts in the draining lymph nodes (dLNs), predominantly expressed IL-10 during experimental autoimmune encephalomyelitis (EAE). We purified these plasmablasts and performed global gene expression profiling of them. We identified a unique gene expression pattern in IL-10+ plasmabalsts. Then, we focused on one of the genes and generated its B cell-specific knock out mice. Mice lacking the gene had an increase of germinal center B cells and produced autoantibodies. These data suggest that the gene contributes to B cell tolerance.
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