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Localization of prestin and expression in the early period after radiation in mice

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Abstract

This study aimed to examine expression and microstructural distribution of prestin in outer hair cells, and the effect of dose and time of radiation on prestin expression in the BALB/c mouse. We also investigated the molecular biological characteristics of prestin and possible mechanisms of sensorineural hearing loss caused by radiation. Seventy 4-week-old mice were randomly divided into four groups, including one control group and three experimental groups. Each experimental group was randomly divided into two groups, which were killed to collect specimens of the cochlea on the 3rd and 7th days after exposure to different doses of 8, 12, and 16 Gy radiation. These cochleas were embedded in paraffin, and then cut into sections. The sections were immunostained with anti-prestin antibodies. The distribution of prestin was observed under optical microscopy and the density of prestin-positive expression was quantitatively calculated by Image-Pro Plus. Prestin had high expression in the lateral membrane and low expression in the cytoplasm of outer hair cells above the nucleus. The density of prestin protein expression of the basal turn was not significantly different after exposure to the different doses of radiation compared with the control group, but up-regulation occurred after radiation in the apex turn. We conclude that prestin protein is mainly expressed in the lateral membrane above the nucleus. Prestin protein may be responsible for the mechanism of injury to the inner ear caused by radiation.

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Acknowledgments

This study was supported by a Grant from Foreign Cooperation Projects of Science and Technology of Kwangtung Province.

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None of the authors has any conflict of interest.

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Authors and Affiliations

  1. Department of Otorhinolaryngology-Head and Neck Surgery, Nan Fang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China

    Chen Yang, Wei Zhang, Xiao-Long Liu & Yong Liang

  2. Department of Radiotherapy, Nan Fang Hospital, Southern Medical University, Guangzhou, 510515, China

    Ya-Wei Yuan, Chen Ren & Jin-Hao Peng

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  1. Chen Yang
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  2. Wei Zhang
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  3. Xiao-Long Liu
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  4. Yong Liang
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  7. Jin-Hao Peng
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Correspondence to Yong Liang.

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Yang, C., Zhang, W., Liu, XL. et al. Localization of prestin and expression in the early period after radiation in mice. Eur Arch Otorhinolaryngol 271, 3333–3340 (2014). https://doi.org/10.1007/s00405-014-3180-6

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  • DOI: https://doi.org/10.1007/s00405-014-3180-6

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