Open Access

MicroRNA‑451 relieves inflammation in cerebral ischemia‑reperfusion via the Toll‑like receptor 4/MyD88/NF‑κB signaling pathway

  • Authors:
    • Wenyan Li
    • Minghao Dong
    • Liangzhao Chu
    • Luqian Feng
    • Xiaochuan Sun
  • View Affiliations

  • Published online on: August 12, 2019     https://doi.org/10.3892/mmr.2019.10587
  • Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study was designed to investigate the role of microRNA‑451 (miRNA‑451) on cerebral ischemia‑reperfusion and to explore its possible mechanism. The expression of miRNA‑451 was downregulated in rats with cerebral ischemia‑reperfusion. In an in vitro model of cerebral ischemia‑reperfusion, the downregulation of miRNA‑451 increased inflammation, demonstrated by increased levels of tumor necrosis factor α, interleukin (IL)‑1b, IL‑6 and IL‑18. However, the upregulation of miRNA‑451 expression decreased inflammation in the same in vitro model of cerebral ischemia‑reperfusion. In addition, it was found that the downregulation of miRNA‑451 induced the expression of Toll‑like receptor 4 (TLR4), myeloid differentiation primary response protein MyD88 (MyD88) and nuclear factor‑κB (NF‑κB)/p65. Moreover, the administration of a MyD88 inhibitor, ST 2825, reduced the expression of MyD88 and NF‑κB/p65 in the in vitro model of cerebral ischemia‑reperfusion, inhibiting the effects of miRNA‑451 upregulation on inflammation. A TLR4 inhibitor, TAK‑242, was used to reduce the expression of TLR4 in the in vitro model of cerebral ischemia‑reperfusion. TAK‑242 suppressed the effects of miRNA‑451 downregulation on inflammation. The present study suggested that miRNA‑451 regulated cerebral ischemia‑reperfusion‑induced inflammation, which is mediated through the TLR4/MyD88/NF‑κB signaling pathway.

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Print ISSN: 1791-2997
Online ISSN:1791-3004

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Copy and paste a formatted citation
APA
Li, W., Dong, M., Chu, L., Feng, L., & Sun, X. (1899). MicroRNA‑451 relieves inflammation in cerebral ischemia‑reperfusion via the Toll‑like receptor 4/MyD88/NF‑κB signaling pathway. Molecular Medicine Reports, 0, 0-0. https://doi.org/10.3892/mmr.2019.10587
MLA
Li, W., Dong, M., Chu, L., Feng, L., Sun, X."MicroRNA‑451 relieves inflammation in cerebral ischemia‑reperfusion via the Toll‑like receptor 4/MyD88/NF‑κB signaling pathway". Molecular Medicine Reports 0.0 (1899): 0-0.
Chicago
Li, W., Dong, M., Chu, L., Feng, L., Sun, X."MicroRNA‑451 relieves inflammation in cerebral ischemia‑reperfusion via the Toll‑like receptor 4/MyD88/NF‑κB signaling pathway". Molecular Medicine Reports 0, no. 0 (1899): 0-0. https://doi.org/10.3892/mmr.2019.10587