MCMV triggers ROS/NLRP3-associated inflammasome activation in the inner ear of mice and cultured spiral ganglion neurons, contributing to sensorineural hearing loss

Zhuang,Wei; Wang,Caiji; Shi,Xi; Qiu,Shiwei; Zhang,Shili; Xu,Bing; Chen,Min; Jiang,Wen; Dong,Hongyan; Qiao,Yuehua

doi:10.3892/ijmm.2018.3539

MCMV triggers ROS/NLRP3-associated inflammasome activation in the inner ear of mice and cultured spiral ganglion neurons, contributing to sensorineural hearing loss

Authors:
- Wei Zhuang
- Caiji Wang
- Xi Shi
- Shiwei Qiu
- Shili Zhang
- Bing Xu
- Min Chen
- Wen Jiang
- Hongyan Dong
- Yuehua Qiao
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Affiliations: Clinical Hearing Center, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221006, P.R. China, Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China, Research Facility Center for Morphology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
Published online on: March 6, 2018 https://doi.org/10.3892/ijmm.2018.3539
Pages: 3448-3456
Copyright: © Zhuang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Congenital cytomegalovirus (CMV) infection is the most common infectious cause of sensorineural hearing loss in children. While the importance of CMV‑induced SNHL has been described, the mechanisms underlying its pathogenesis and the role of inflammatory responses remain elusive. The present study established an experimental model of hearing loss after systemic infection with murine CMV (MCMV) in newborn mice. Auditory brainstem responses were tested to evaluate hearing at 3 weeks, expression of inflammasome‑associated factors was assessed by immunofluorescence, western blot analysis, reverse transcription‑quantitative polymerase chain reaction and ELISA. MCMV sequentially induced inflammasome‑associated factors. Furthermore, the inflammasome‑associated factors were also increased in cultured spiral ganglion neurons infected with MCMV for 24 h. In addition, MCMV increased the content of reactive oxygen species (ROS). These results suggest that hearing loss caused by MCMV infection may be associated with ROS‑induced inflammation.

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