期刊
FRONTIERS IN IMMUNOLOGY
卷 12, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2021.615898
关键词
interleukin-19; macrophage; antigen presentation; experimental autoimmune encephalomyelitis; multiple sclerosis
类别
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Ministry of Health, Labour and Welfare of Japan
- Program for Promotion of Fundamental Studies in Health Sciences of the National Institute of Biomedical Innovation (NIBIO) of Japan
- Naito Foundation
IL-19 deficiency exacerbates multiple sclerosis by promoting Th17 cell infiltration and increasing expression of antigen presentation and Th17 cell differentiation factors. IL-19 suppresses MS pathogenesis by inhibiting macrophage antigen presentation and Th17 cell expansion. Treatment with IL-19 shows significant therapeutic benefits in experimental autoimmune encephalomyelitis.
Interleukin-19 (IL-19) acts as a negative-feedback regulator to limit proinflammatory response of macrophages and microglia in autocrine/paracrine manners in various inflammatory diseases. Multiple sclerosis (MS) is a major neuroinflammatory disease in the central nervous system (CNS), but it remains uncertain how IL-19 contributes to MS pathogenesis. Here, we demonstrate that IL-19 deficiency aggravates experimental autoimmune encephalomyelitis (EAE), a mouse model of MS, by promoting IL-17-producing helper T cell (Th17 cell) infiltration into the CNS. In addition, IL-19-deficient splenic macrophages expressed elevated levels of major histocompatibility complex (MHC) class II, co-stimulatory molecules, and Th17 cell differentiation-associated cytokines such as IL-1 beta, IL-6, IL-23, TGF-beta 1, and TNF-alpha. These observations indicated that IL-19 plays a critical role in suppression of MS pathogenesis by inhibiting macrophage antigen presentation, Th17 cell expansion, and subsequent inflammatory responses. Furthermore, treatment with IL-19 significantly abrogated EAE. Our data suggest that IL-19 could provide significant therapeutic benefits in patients with MS.
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