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Prevention of cisplatin-induced hearing loss by administration of a thiosulfate-containing gel to the middle ear in a guinea pig model
Vise andre og tillknytning
2011 (engelsk)Inngår i: Cancer Chemotherapy and Pharmacology, ISSN 0344-5704, E-ISSN 1432-0843, Vol. 68, nr 6, s. 1547-1556Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Thiosulfate may reduce cisplatin-induced ototoxicity, most likely by relieving oxidative stress and by forming inactive platinum complexes. This study aimed to determine the concentration and protective effect of thiosulfate in the cochlea after application of a thiosulfate-containing high viscosity formulation of sodium hyaluronan (HYA gel) to the middle ear prior to i.v. injection of cisplatin in a guinea pig model. The release of thiosulfate (0.1 M) from HYA gel (0.5% w/w) was explored in vitro. Thiosulfate in the scala tympani perilymph of the cochlea 1 and 3 h after application of thiosulfate in HYA gel to the middle ear was quantified with HPLC and fluorescence detection. Thiosulfate in blood and CSF was also explored. The potential otoprotective effect was evaluated by hair cell count after treatment with thiosulfate in HYA gel applied to the middle ear 3 h prior to cisplatin injection (8 mg/kg b.w.). HYA did not impede the release of thiosulfate. Middle ear administration of thiosulfate in HYA gel gave high concentrations in the scala tympani perilymph while maintaining low levels in blood, and it protected against cisplatin-induced hair cell loss. HYA gel is an effective vehicle for administration of thiosulfate to the middle ear. Local application of a thiosulfate-containing HYA gel reduces the ototoxicity of cisplatin most likely without compromising its antineoplastic effect. This provides a minimally invasive protective treatment that can easily be repeated if necessary.

sted, utgiver, år, opplag, sider
New York: Springer-Verlag New York, 2011. Vol. 68, nr 6, s. 1547-1556
Emneord [en]
Cisplatin, Thiosulfate, Sodium hyaluronan, Topical administration, Guinea pig, Ototoxicity
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Identifikatorer
URN: urn:nbn:se:umu:diva-50850DOI: 10.1007/s00280-011-1656-2ISI: 000297344300020OAI: oai:DiVA.org:umu-50850DiVA, id: diva2:471176
Tilgjengelig fra: 2012-01-02 Laget: 2011-12-29 Sist oppdatert: 2018-06-08bibliografisk kontrollert

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