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Curcumin protects BV2 cells against lipopolysaccharide-induced injury via adjusting the miR-362-3p/TLR4 axis

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Abstract

Curcumin was demonstrated to be an active ingredient with anti-inflammatory effects. This research was to investigate the effects of curcumin. We found that curcumin promoted cell viability and suppressed cell apoptosis. Meanwhile, curcumin decreased the level of cleaved caspase-3 and the release of TNF-α, IL-1β, IL-6, but increased IL-10 release in LPS-treated BV2 cells. miR-362-3p expression was upregulated by curcumin, while TLR4 expression was downregulated. Besides, we observed that the cytoprotective effects of curcumin were lost when miR-362-3p was silenced. TLR4 was a direct target gene of miR-362-3p. Moreover, miR-362-3p deletion attenuated the cytoprotective effects of curcumin by regulating TLR4 expression in LPS-induced BV2 cells. Furthermore, curcumin suppressed p-p65 expression via regulating miR-362-3p/TLR4 axis. We discovered that curcumin exhibited protective effects against LPS-triggered cell injury via modulating miR-362-3p/TLR4 axis through NF-κB pathway.

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Funding

This study was supported by the Fundamental Research Funds for the Central Universities (Grant No. 2042017kf0139), Innovative Seed Funds of Medical College of Wuhan University (Grant No. TFZZ2018027), Natural Science Foundation of Hubei Province (Grant No. 2019CFB457) and Wuhan Medical Research Project (Youth Project) (Grant No. WZ19Q02).

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Author notes

  1. Ping Xie and Ming Deng have contributed equally to this work.

Authors and Affiliations

  1. Department of Chinese Traditional Medicine, TongRen Hospital of Wuhan University (Wuhan Third Hospital), Wuhan, Hubei, China

    Ping Xie, Qinguo Sun, Bo Jiang & Hongjie Xu

  2. Department of Orthopedics, Renmin Hospital of Wuhan University, No. 238, Jiefang Road, Wuhan, 430060, Hubei, China

    Ming Deng, Yan Zhou, Yonggang Ma & Zhonghui Chen

  3. Department of Radiotherapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China

    Junqi Liu

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  1. Ping Xie
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Correspondence to Ming Deng.

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Xie, P., Deng, M., Sun, Q. et al. Curcumin protects BV2 cells against lipopolysaccharide-induced injury via adjusting the miR-362-3p/TLR4 axis. Mol Biol Rep 47, 4199–4208 (2020). https://doi.org/10.1007/s11033-020-05543-y

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