Effects of aminoglycoside administration on cochlear elements in human temporal bones

Takeshi Kusunoki, Sebahattin Cureoglu, Patricia A. Schachern, Andre Sampaio, Hisaki Fukushima, Mehmet F. Oktay, Michael M. Paparella

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Although there have been numerous reports on the relationship between the period of aminoglycoside administration and cochlear damage in animals, to date there have been no such studies in humans. The purpose of this study is to observe the early and late cochlear effects of aminoglycoside administration on hair cells, spiral ganglion cells, stria vascularis, and spiral ligament. Specimens were divided into three groups. Group I included "normal" temporal bones with no histopathologic findings of otitis media and no history of otologic or ototoxic drug administration. Group II consisted of temporal bones that received aminoglycosides within 2 weeks before death and group III of temporal bones that had aminoglycosides from 2 weeks to 6 months prior to death. Patients in groups II and III received gentamycin, kanamycin or tobramycin. Temporal bones were excluded from groups II and III if patients had a history of otologic disease or other ototoxic drugs. All temporal bones were examined under light microscopy. Standard cytocochleograms and spiral ganglion cell reconstructions were done on all temporal bones. Morphometric measurements of areas of stria vascularis were made in all turns of the cochlea on mid-modiolar sections. Spiral ligament was divided into four segments according to the locations of different types of fibrocytes. The mean loss of fibrocytes in each segment was estimated. The percentages of intact outer hair cells in the basal turn were significantly greater in group I compared to groups II and III. The mean area of the stria vascularis in the apical turn was significantly less in groups II and III compared to group I. This study demonstrates that in a short period (within 2 weeks) after aminoglycoside administration, a decrease in hair cells and in the area of the stria vascularis occurred.

Original languageEnglish (US)
Pages (from-to)383-388
Number of pages6
JournalAuris Nasus Larynx
Issue number4
StatePublished - Dec 2004


  • Hair cell
  • Human temporal bone
  • Ototoxicity of aminoglycoside
  • Spiral ganglion cell
  • Spiral ligament
  • Stria vascularis

Fingerprint Dive into the research topics of 'Effects of aminoglycoside administration on cochlear elements in human temporal bones'. Together they form a unique fingerprint.

Cite this