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  • Title: Changes in Serum Prestin Concentration After Exposure to Cisplatin.
    Author: Liba B, Naples J, Bezyk E, Campbell C, Mei M, Parham K.
    Journal: Otol Neurotol; 2017 Dec; 38(10):e501-e505. PubMed ID: 29065096.
    Abstract:
    HYPOTHESIS: There are temporal changes in the outer-hair-cell-specific protein, prestin, in the blood after administration of low-dose cisplatin. METHODS: Two rodent models of ototoxicity were used. After control and baseline data collection, mice (n = 30) and guinea pigs (n = 10), respectively, were treated with cisplatin at 8 mg/kg. Auditory brainstem responses were recorded on Days 1, 3, 7, and 14 after treatment. Five mice were sacrificed at each time point and serum samples were obtained. A group of 10 guinea pigs were tested and serum samples were collected at each time point. Serum prestin concentrations were measured using separate enzyme-linked immunosorbent assays for each species. RESULTS: Auditory brainstem responses thresholds changed relatively little in mice, but gradually increased in guinea pigs, as a function of time after cisplatin exposure. In contrast, serum prestin concentrations rose, reaching a peak on Days 3 and 7 after cisplatin treatment in mouse and guinea pig, respectively, before declining back to or below baseline/control levels 14 days after treatment. CONCLUSION: There was a time-dependent pattern of change in serum prestin after exposure to low-dose cisplatin in a resistant (mouse) and sensitive (guinea pig) rodent models. These comparative results suggest prestin may serve as a biomarker for cisplatin ototoxicity.
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