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Cisplatin and oxaliplatin are toxic to cochlear outer hair cells and both target thioredoxin reductase in organ of Corti cultures
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Öron-, näs- och halssjukdomar.
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2014 (engelsk)Inngår i: Acta Oto-Laryngologica, ISSN 0001-6489, E-ISSN 1651-2251, Vol. 134, nr 5, s. 448-454Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Conclusion: Inhibition of thioredoxin reductase (TrxR) may be a contributing factor in cisplatin- induced ototoxicity. Direct exposure of organ of Corti to cisplatin and oxaliplatin gives equal loss of hair cells. Objectives: Platinum- containing drugs are known to target the anti- oxidant selenoprotein TrxR in cancer cells. Two such anti- cancer, platinum- containing drugs, cisplatin and oxaliplatin, have different side effects. Only cisplatin induces hearing loss, i.e. has an ototoxic side effect that is not seen after treatment with oxaliplatin. The objective of this study was to evaluate if TrxR is a target in the cochlea. Loss of outer hair cells was also compared when cisplatin and oxaliplatin were administered directly to the organ of Corti. Methods: Organ of Corti cell culture was used for direct exposure to cisplatin and oxaliplatin. Hair cells were evaluated and the level of TrxR was assessed. Immunohistochemical staining for TrxR was performed. An animal model was used to evaluate the effect on TrxR after treatment with cisplatin and oxaliplatin in vivo. Results: Direct exposure of cochlear organotypic cultures to either cisplatin or oxaliplatin induced comparable levels of outer hair cell loss and inhibition of TrxR, demonstrating that both drugs are similarly ototoxic provided that the cochlea becomes directly exposed.

sted, utgiver, år, opplag, sider
2014. Vol. 134, nr 5, s. 448-454
Emneord [en]
Ototoxicity, cochlear organotypic culture, animal model, platinum drugs
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Identifikatorer
URN: urn:nbn:se:uu:diva-224708DOI: 10.3109/00016489.2013.879740ISI: 000334403800002OAI: oai:DiVA.org:uu-224708DiVA, id: diva2:719265
Tilgjengelig fra: 2014-05-23 Laget: 2014-05-19 Sist oppdatert: 2017-12-05bibliografisk kontrollert

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