Open Access

Quercetin inhibits NTHi-triggered CXCR4 activation through suppressing IKKα/NF-κB and MAPK signaling pathways in otitis media

  • Authors:
    • Yu-Kun Ma
    • Yu-Bin Chen
    • Peng Li
  • View Affiliations

  • Published online on: March 20, 2018     https://doi.org/10.3892/ijmm.2018.3577
  • Pages: 248-258
  • Copyright: © Ma et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Otitis media is one of the most common bacterial infections in children, contributing to hearing loss. A vital bacterial pathogen leading to otitis media development is the nontypeable Haemophilus influenzae (NTHi). Inflammation response is reported as an important characristic for otitis media. Chemokine CXC receptor 4 (CXCR4) is a 352-amino acid seven-span transmembrane G-protein coupled receptor, essential for inflammatory response. However, the possible molecular mechanism indicating the alteration of CXCR4 modulated by NTHi is poorly known. In the present study, NTHi enhanced CXCR4 expression through phosphorylation of IKKα and p38, which relied on nuclear factor-κB (NF-κB) translocation in vitro as well as in the middle ear of mice in vivo. Previously, quercetin, a natural production mainly isolated from rutin, has shown anti-inflammatory effects. Here, we report that quercetin suppressed NTHi-induced CXCR4 expression levels in vitro and in vivo. Quercetin blocked CXCR4 activation through direct IKKβ phosphorylation inhibition, as well as of p38 MAPK restraining. Hence, identification of quercetin may be a potential therapeutic strategy for treating otitis media induced by NTHi through inflammation suppression.
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July-2018
Volume 42 Issue 1

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Ma Y, Chen Y and Li P: Quercetin inhibits NTHi-triggered CXCR4 activation through suppressing IKKα/NF-κB and MAPK signaling pathways in otitis media. Int J Mol Med 42: 248-258, 2018
APA
Ma, Y., Chen, Y., & Li, P. (2018). Quercetin inhibits NTHi-triggered CXCR4 activation through suppressing IKKα/NF-κB and MAPK signaling pathways in otitis media. International Journal of Molecular Medicine, 42, 248-258. https://doi.org/10.3892/ijmm.2018.3577
MLA
Ma, Y., Chen, Y., Li, P."Quercetin inhibits NTHi-triggered CXCR4 activation through suppressing IKKα/NF-κB and MAPK signaling pathways in otitis media". International Journal of Molecular Medicine 42.1 (2018): 248-258.
Chicago
Ma, Y., Chen, Y., Li, P."Quercetin inhibits NTHi-triggered CXCR4 activation through suppressing IKKα/NF-κB and MAPK signaling pathways in otitis media". International Journal of Molecular Medicine 42, no. 1 (2018): 248-258. https://doi.org/10.3892/ijmm.2018.3577