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Aspirin ameliorates experimental autoimmune encephalomyelitis through interleukin-11-mediated protection of regulatory T cells.


ABSTRACT: Multiple sclerosis (MS) is a human disease that results from autoimmune T cells targeting myelin protein that is expressed within the central nervous system. In MS, the number of FoxP3-expressing regulatory T cells (Tregs) is reduced, which facilitates the activation of autoreactive T cells. Because aspirin (acetylsalicylic acid) is the most widely used nonsteroidal anti-inflammatory drug, we examined its immunomodulatory effect in mice with experimental autoimmune encephalomyelitis (EAE), an animal model of MS. We found that low-dose aspirin suppressed the clinical symptoms of EAE in mouse models of both relapsing-remitting and chronic disease. Aspirin reduced the development of EAE driven by myelin basic protein (MBP)-specific T cells and the associated perivascular cuffing, inflammation, and demyelination. The effects of aspirin required the presence of CD25+FoxP3+ Tregs Aspirin increased the amounts of Foxp3 and interleukin-4 (IL-4) in T cells and suppressed the differentiation of naïve T cells into T helper 17 (TH17) and TH1 cells. Aspirin also increased the transcription of Il11 mediated by the transcription factor CREB, which was necessary for the generation of Tregs Neutralization of IL-11 negated the effects of aspirin on Treg development and exacerbated EAE. Furthermore, we found that IL-11 alone was sufficient to maintain the percentage of FoxP3+ Tregs and protect mice from EAE. These results identify a previously uncharacterized mode of action of aspirin.

SUBMITTER: Mondal S 

PROVIDER: S-EPMC6325078 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Aspirin ameliorates experimental autoimmune encephalomyelitis through interleukin-11-mediated protection of regulatory T cells.

Mondal Susanta S   Jana Malabendu M   Dasarathi Sridevi S   Roy Avik A   Pahan Kalipada K  

Science signaling 20181127 558


Multiple sclerosis (MS) is a human disease that results from autoimmune T cells targeting myelin protein that is expressed within the central nervous system. In MS, the number of FoxP3-expressing regulatory T cells (T<sub>regs</sub>) is reduced, which facilitates the activation of autoreactive T cells. Because aspirin (acetylsalicylic acid) is the most widely used nonsteroidal anti-inflammatory drug, we examined its immunomodulatory effect in mice with experimental autoimmune encephalomyelitis (  ...[more]

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