Dehydroepiandrosterone Sulfate Reduces Acoustic Injury of the Guinea-Pig Cochlea

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  • Tabuchi Keiji
    Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Murashita Hidekazu
    Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Tobita Tadamichi
    Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Oikawa Keiko
    Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Tsuji Shigeki
    Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Uemaetomari Isao
    Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Hara Akira
    Department of Otolaryngology, Graduate School of Comprehensive Human Sciences, University of Tsukuba

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The present study was performed to determine effects of dehydroepiandrosterone sulfate (DHEAS), a neurosteroid, on acoustic injury. Albino guinea pigs were exposed to a 2 kHz pure tone of 120 or 125 dB sound pressure level for 10 min immediately after intravenous administration of DHEAS. Statistically significant improvement in the compound action potential threshold shifts and in amplitude reduction of distortion-product otoacoustic emissions was observed 1 week after the acoustic overexposure in the animals treated with DHEAS. The present results suggest that DHEAS has a protective effect against acoustic injury of the cochlea.<br>

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