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Neurotoxicity Research

, Volume 35, Issue 4, pp 838–847 | Cite as

Salicylate-Induced Ototoxicity of Spiral Ganglion Neurons: Ca2+/CaMKII-Mediated Interaction Between NMDA Receptor and GABAA Receptor

  • Danxue Qin
  • Peiqiang Liu
  • Huiying Chen
  • Xi Huang
  • Wenhua Ye
  • Xiaoyu Lin
  • Fangyu Wei
  • Jiping SuEmail author
Original Article
  • 46 Downloads

Abstract

Sodium salicylate (SS) is one of the nonsteroidal anti-inflammatory drugs and widely used in clinical practice. Therefore, we aimed to investigate the potential ototoxicity mechanism of sodium salicylate: the influence of Ca2+/calmodulin-dependent protein kinase II (Ca2+/CaMKII) in interaction between NMDA receptors (NMDAR) and GABAA receptors (GABAAR) in rat cochlear spiral ganglion neurons (SGNs). After treatment with SS, NMDA, and an NMDAR inhibitor (APV), the changes of GABAAR β3 (GABR β3) mRNA, surface and total protein, and GABAAR currents in SGNs were assessed by quantitative PCR, Western blot, and whole-cell patch clamp. Mechanistically, SS and/or NMDA increased the GABR β3 mRNA expression, while decreased GABR β3 surface protein levels and GABAAR-mediated currents. Moreover, application of SS and/or NMDA showed promotion in phosphorylation levels at S383 of GABR β3. Collectively, Ca2+ chelator (BAPTA) or Ca2+/CaMKII inhibitor (KN-93) reversed the effects of SS and/or NMDA on GABAAR. Therefore, we hypothesize that the interaction between NMDAR and GABAAR is involved in the SGNs damage induced by SS. In addition, the underlying molecular mechanism is related to Ca2+/CaMKII-mediated signaling pathway, which suggests that the interaction between calcium signal-regulated receptors mediates SS ototoxicity.

Keywords

Spiral ganglion neurons Neurotoxicity Ca2+/CaMKII GABAANMDAR 

Abbreviations

SGNs

Spiral ganglion neurons

GABAAR

γ-Aminobutyric acid-A receptor

NMDAR

N-Methyl-d-aspartate receptor

SS

Sodium salicylate

APV

NMDAR inhibitor

KN93

Ca2+/calmodulin-dependent protein kinase II inhibitor

BAPTA

Ca2+ chelator

PBS

Phosphate-buffered saline

TBST

Tris-buffered saline tween

Notes

Authors’ Contributions

Danxue Qin performed cell culture, immunofluorescence, and Western Blot detection, which were used in the present study, and completed data analysis; paper writing was under the guidance of Huiying Chen and Jiping Su. Peiqiang Liu performed quantitative PCR and whole-cell patch clamp technique, which were used in the present study. Wenhua Ye, Xiaoyu Lin, and Weifang Yu made effort for cell culture. All the experimental technology were under the guidance of Huiying Chen and Xi Huang. Jiping Su conceived, designed, and directed this project. All authors contributed to and have approved the final manuscript.

Funding Information

This work was supported by the National Natural Science Foundation of China (NSFC) (81360157, 81560174), the Life Sciences Research Institute of Guangxi Medical University, and the Experimental Animal Center of Guangxi Medical University.

Compliance with Ethical Standards

The experimental animals were provided by the Experimental Animal Center of Guangxi Medical University, and the animal experiments were approved and governed by the Animal Ethics Committee of Guangxi Medical University. All procedures performed in studies involving animals were in accordance with the ethical standards of the NSFC guidelines for the care and use of laboratory animals; every effort was made to relieve any pain felt by the experimental animals.

Conflict of Interest

The authors declare that they have no conflicts of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Danxue Qin
    • 1
  • Peiqiang Liu
    • 1
  • Huiying Chen
    • 1
  • Xi Huang
    • 1
    • 2
  • Wenhua Ye
    • 1
  • Xiaoyu Lin
    • 1
  • Fangyu Wei
    • 1
  • Jiping Su
    • 1
    Email author
  1. 1.Department of Otolaryngology-Head and Neck SurgeryFirst Affiliated Hospital of Guangxi Medical UniversityNanningChina
  2. 2.Department of Otolaryngology-Head and Neck SurgeryWuhan No.1 HospitalWuhanChina

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