Inflammasome activation in mouse inner ear in response to MCMV induced hearing loss
Xi Shi
Yanfen Dong
Ya Li
ZenLu Zhao
Huan Li
Shiwei Qiu
Yaohan Li
Weiwei Guo
Yuehua Qiao
摘要：Objective:To identify presence of inflammasome activated in mouse cochlea with sensorineural hearing loss (SNHL) caused by cytomegalovirus (CMV) infection. Method:MCMV was injected into the right cerebral hemisphere in neonatal BALB/c mice at 2000 pfu virus titers. Auditory brainstem responses (ABRs) were tested to evaluate hearing at 21 days. Histopathological studies were conducted to confirm localizations of MCMV infected cells in the inner ear. Expression of inflammasome related factors was assessed by immunofluorescence, Quantitative real-time PCR and Western blotting. Results:In the mouse model of CMV induced SNHL, inflammasome related kinase Caspase-1 and downstream inflammatory factor IL-1b and IL-18 were found increased and activated after CMV infection in the cochlea. These factors could further up-regulate expression of IL-6 and TNF-a. These inflammatory factors are neurotoxicity and may contribute to hearing impairment. Furthermore, we also detected significantly increased AIM2 protein that accumulated in the SGN of cochleae with CMV infection. Significance:We have shown that inflammasome as a novel inherent immunity mechanism may contribute to hearing impairment. Conclusion:Our data indicate that imflammasome assemble in mouse inner ear in response to CMV infection. We have revealed a novel pa-thology event in CMV induced SNHL involving activation of inflammasome in mouse cochlea. Additionally, we have shown that inflammasome may be a novel target for prevention and treatment of CMV related SNHL. Copyright ? 2016, The Authors. Production & hosting by Elsevier (Singapore) Pte Ltd On behalf of PLA General Hospital Department of OtolaryngologyHead and Neck Surgery. This is an open access article under the CC BY-NC-ND license (
机标关键词：induced hearing losshearing impairmentsensorineural hearing lossprevention and treatmentinflammatory factorsinner earWestern blottingrelated factors
资助基金：Innovation and Entrepreneurship Training Program for Col-lege Student in Jiangsu Province (grant numbers 201510313003Z)
论文发表日期：2015-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：7( 143-149 )
英文信息