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2016 ; 7
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IL-10 Modulates Th17 Pathogenicity during Autoimmune Diseases
#MMPMID27308096
Guo B
J Clin Cell Immunol
2016[Apr]; 7
(2
): ä PMID27308096
show ga
The immune system is essential for host defense against pathogen infections;
however dysregulated immune response may lead to inflammatory or autoimmune
diseases. Elevated activation of both innate immune cells and T cells such as
Th17 cells are linked to many autoimmune diseases, including Multiple Sclerosis
(MS), arthritis and inflammatory bowel disease (IBD). To keep immune homeostasis,
the immune system develops a number of negative feedback mechanisms, such as the
production of anti-inflammatory cytokine IL-10, to dampen excessive production of
inflammatory cytokines and uncontrolled activation of immune cells. Our recent
studies uncover a novel immunoregulatory function of interferon (IFN) pathways on
the innate and antigen-specific immune response. Our results show that IFN?/?
induced IL-10 production from macrophages and Th17 cells, which in turn
negatively regulated Th17 function in autoimmune diseases such as Experimental
Allergic Encephalomyelitis (EAE), an animal model of human MS. In a chronic
colitis model resembling human IBD, we also found that IL-10 inhibited
inflammasome/IL-1 pathway, and the pathogenicity of Th17 cells, leading to
reduced chronic intestinal inflammation. Results from our and other studies
further suggest that IL-10 produced by both macrophages and regulatory T cells
may shift Th17 into more regulatory phenotypes, leading to reduced inflammatory
response.