Wright, Anthony; Forge, Andrew; Jagger, Daniel J; (2022) Structural changes in the human stria vascularis induced by aminoglycosides and loop diuretics. Hearing Research , 426 , Article 108626. 10.1016/j.heares.2022.108626.

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Abstract

The human stria vascularis has been examined both by scanning and transmission electron microscopy in normal controls and from individuals who had received loop diuretics, aminoglycoside antibiotics or some combination of the two prior to their deaths. The tissues were preserved by perilymphatic perfusion of fixative within an hour of death and preservation was adequate. The normal ultrastructure is described and does not differ significantly from that found in experimental animals. The loop diuretics are associated with structural changes that cannot be distinguished from those found in animals treated with large doses of the same drugs. The aminoglycosides caused some changes, but the patients had been in renal failure and this probably contributed to the structural alterations. The combination of a loop diuretic and aminoglycoside was associated with a range of alterations from mild to severe. Overall, the three treatment groups had a series of ultrastructural changes resembling those found in animal models thereby justifying the use of experimental animals to predict human ototoxicity.

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