Abstract
Immunohistochemical study for single-stranded DNA (ssDNA) with vestibule of guinea pigs was performed after the injection of keyhole limpet hemocyanin (KLH) into the right endolymphatic sac. Endolymphatic hydrops became evident by expansion of the Reissner's membrane in the cochlea of all animals 1 day after the injection of KLH. Increased ssDNA expression was detected in the sensory epithelium and transitional area, while temporal bones in the control group did not show any ssDNA immunoreactivities. ssDNA is accompanied with the apoptotic change in the vestibule. Our results suggest that apoptotic changes could be involved in the hydropic vestibule and these phenomena lead inner ear disturbance as seen in endolymphatic hydrops.
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