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Journal of Neuroinflammation
Published in: Journal of Neuroinflammation 1/2015

Open Access 01-12-2015 | Research

MicroRNA367 negatively regulates the inflammatory response of microglia by targeting IRAK4 in intracerebral hemorrhage

Authors: Bangqing Yuan, Hanchao Shen, Li Lin, Tonggang Su, Lina Zhong, Zhao Yang

Published in: Journal of Neuroinflammation | Issue 1/2015

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Abstract

Background

Intracerebral hemorrhage (ICH) induces microglial activation and the release of inflammatory cytokines, leading to inflammation in the brain. IRAK4, an essential component of the MyD88-dependent pathway, activates subsets of divergent signaling pathways in inflammation.

Methods

In the experiment, microglia were stimulated with erythrocyte lysates, and then miR-367, IRAK4, NF-ĸB activation and downstream proinflammatory mediator production were analyzed. In addition, inflammation, brain edema, and neurological functions in ICH mice were also assessed.

Results

Here, we report that ICH downregulated miR-367 expression but upregulated IRAK4 expression in primary microglia. We also demonstrate that miR-367 suppressed IRAK4 expression by directly binding its 3′-untranslated region. MiR-367 inhibited NF-ĸB activation and downstream proinflammatory mediator production. Knocking down IRAK4 in microglia significantly decreased the IRAK4 expression and inhibited the NF-ĸB activation and the downstream production of proinflammatory mediators. In addition, our results indicate that miR-367 could inhibit expression of proinflammatory cytokines, reduce brain edema, and improve neurological functions in ICH mice.

Conclusions

In conclusion, our study demonstrates that miR-367/IRAK4 pathway plays an important role in microglial activation and neuroinflammation in ICH. Our finding also suggests that miR-367 might represent a potential therapeutic target for ICH.
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Metadata
Title
MicroRNA367 negatively regulates the inflammatory response of microglia by targeting IRAK4 in intracerebral hemorrhage
Authors
Bangqing Yuan
Hanchao Shen
Li Lin
Tonggang Su
Lina Zhong
Zhao Yang
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Journal of Neuroinflammation / Issue 1/2015
Electronic ISSN: 1742-2094
DOI
https://doi.org/10.1186/s12974-015-0424-3

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