Renal cortical mitochondria are the source of oxygen free radicals enhanced by gentamicin.

Abstract:

:Rat renal cortical mitochondria were isolated from Wistar male rats weighing 80 to 120 g to investigate whether the source of oxygen free radicals was renal cortical mitochondria enhanced by gentamicin. In renal cortical mitochondria with or without the addition of gentamicin, DMSO, DFO, CAT, SOD, and MT1 were added separately, then incubated at 37 degrees C for 90 min. Superoxide anions and hydroxyl radicals were then determined. The results showed that superoxide anions and hydroxyl radicals generated in mitochondria were enhanced by the addition of in vitro gentamicin (12.4 mg/mL) when compared to those without the addition of gentamicin. Dimethylsulfoxide (DMSO), catalase (CAT), and deferoxamine (DFO) significantly inhibited hydroxyl radicals enhanced by gentamicin, but superoxide dismutase (SOD) and metallothionein-1 (MT1) did not. SOD significantly inhibited the production of superoxide anions. Our data indicated that renal cortical mitochondria are the source of oxygen free radicals and that production is enhanced by gentamicin. This provides more insight on the pathogenetic role of hydroxyl radicals and superoxide anions in gentamicin-induced nephrotoxicity in vitro.

journal_name

Ren Fail

journal_title

Renal failure

authors

Yang CL,Du XH,Han YX

doi

10.3109/08860229509036371

subject

Has Abstract

pub_date

1995-01-01 00:00:00

pages

21-6

issue

1

eissn

0886-022X

issn

1525-6049

journal_volume

17

pub_type

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