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Damaged hair cells can lead to additional destruction of parts of the auditory afferent pathway sequentially, which is called secondary degeneration. Recently, researches regarding cochlear implants have been actively carried out for clinical purposes; secondary degeneration in animals is a much more practical model for identifying the prognosis of cochlear implants. However, an appropriate model for this research is not established yet. Thus, we developed a secondary degeneration model using an ototoxic drug. 35 gerbils were separated into four different groups and kanamycin was applied via various approaches. ABR was measured several times after drug administration. SGCs were also counted to identify any secondary degeneration. The results showed that outer and inner HCs were damaged in all kanamycin-treated groups. Twelve weeks after kanamycin treatment, the round window membrane injection group showed severe subject differences in hair cells and SGC damage, whereas the gelfoam group showed consistent and severe damage in hair cells and SGCs. In this study, we successfully induced secondary degeneration in hair cells in a gerbil model. This model can be used for various purposes in the hearing research area either for treatment or for preservation.<\/jats:p>","DOI":"10.1155\/2018\/9158187","type":"journal-article","created":{"date-parts":[[2018,3,1]],"date-time":"2018-03-01T23:32:26Z","timestamp":1519947146000},"page":"1-10","source":"Crossref","is-referenced-by-count":5,"title":["Secondary Degeneration of Auditory Neurons after Topical Aminoglycoside Administration in a Gerbil Model"],"prefix":"10.1155","volume":"2018","author":[{"given":"Jae-Hun","family":"Lee","sequence":"first","affiliation":[{"name":"College of Medicine, Dankook University, Beckman Laser Institute Korea, Cheonan, Republic of Korea"},{"name":"Department of Otolaryngology-Head & Neck Surgery, College of Medicine, Dankook University, Cheonan, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Min Young","family":"Lee","sequence":"additional","affiliation":[{"name":"College of Medicine, Dankook University, Beckman Laser Institute Korea, Cheonan, Republic of Korea"},{"name":"Dankook University Hospital, Cheonan, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Phil-Sang","family":"Chung","sequence":"additional","affiliation":[{"name":"College of Medicine, Dankook University, Beckman Laser Institute Korea, Cheonan, Republic of Korea"},{"name":"Department of Otolaryngology-Head & Neck Surgery, College of Medicine, Dankook University, Cheonan, Republic of Korea"},{"name":"Dankook University Hospital, Cheonan, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1870-0748","authenticated-orcid":true,"given":"Jae Yun","family":"Jung","sequence":"additional","affiliation":[{"name":"College of Medicine, Dankook University, Beckman Laser Institute Korea, Cheonan, Republic of Korea"},{"name":"Department of Otolaryngology-Head & Neck Surgery, College of Medicine, Dankook University, Cheonan, Republic of Korea"},{"name":"Dankook University Hospital, Cheonan, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"issue":"4","key":"1","first-page":"76","volume":"93","year":"1984","journal-title":"Annals of Otology, Rhinology & Laryngology"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1016\/0378-5955(88)90018-4"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1016\/j.heares.2017.01.005"},{"key":"4","doi-asserted-by":"publisher","DOI":"10.1007\/s12640-017-9773-2"},{"key":"5","doi-asserted-by":"publisher","DOI":"10.1016\/j.heares.2015.03.002"},{"key":"6","doi-asserted-by":"publisher","DOI":"10.1097\/MLG.0b013e31817c1303"},{"year":"1974","key":"7"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1016\/0378-5955(95)00165-1"},{"key":"9","doi-asserted-by":"publisher","DOI":"10.3109\/00016488809098973"},{"key":"10","doi-asserted-by":"publisher","DOI":"10.1007\/s10162-004-5050-1"},{"issue":"2","key":"11","doi-asserted-by":"crossref","first-page":"156","DOI":"10.1002\/cne.10085","volume":"442","year":"2002","journal-title":"Journal of Comparative Neurology"},{"key":"12","doi-asserted-by":"publisher","DOI":"10.1177\/000348948909800602"},{"key":"13","doi-asserted-by":"publisher","DOI":"10.1016\/S0194-5998(97)70178-5"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1177\/000348949810701102"},{"key":"15","doi-asserted-by":"publisher","DOI":"10.1001\/archotol.1959.00730030400002"},{"issue":"2","key":"16","first-page":"117","volume":"7","year":"1986","journal-title":"American Journal of Otolaryngology - 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