Carboplatin induces less apoptosis in the cochlea of guinea pigs than cisplatin.

Abstract:

BACKGROUND:Cisplatin (CDDP) is known to cause inner ear damage while carboplatin (CBDCA) induces less ototoxicity than CDDP. We examined apoptotic changes in the cochlea of guinea pigs after injection of CDDP or CBDCA using immunohistochemical and electrophysiological techniques. METHODS:Three days after the injection of each solution, the cochleas were immunohistochemically examined for the presence of fragments of single-stranded DNA (ssDNA). The auditory brain stem response was recorded before and three days after the injection. RESULTS:We detected fragments of ssDNA in the stria vascularis and the spiral ligament of the CDDP-treated cochlea. In this group, the threshold of the auditory brainstem response was significantly elevated, however, in the CBDCA group, no apparent change of the threshold was detected. In the CBDCA group, fragments of ssDNA were detected in the stria vascularis and the spiral ligament. The number of cells that stained positive for ssDNA, was less than that in the CDDP group. CONCLUSIONS:Our findings indicate that CBDCA induces less apoptosis than CDDP and that this phenomenon contributes to the ototoxicity of CDDP.

journal_name

Chemotherapy

journal_title

Chemotherapy

authors

Watanabe KC,Jinnouchi K,Hess A,Michel O,Baba S,Yagi T

doi

10.1159/000057667

subject

Has Abstract

pub_date

2002-05-01 00:00:00

pages

82-7

issue

2

eissn

0009-3157

issn

1421-9794

pii

57667

journal_volume

48

pub_type

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