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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Mechanisms of apoptosis induced by cisplatin in marginal cells in mouse stria vascularis.

Degeneration of the stria vascularis (SV) is amongst the major causes of cisplatin (CDDP)-induced hearing impairment. The pathways of apoptosis occurring in the SV due to CDDP were examined using a mouse experimental model. Temporal bones of adult C57BL/6 mice were collected on days 3, 7 and 14 after the local application of CDDP. Terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling assay and immunostaining for apoptosis-related proteins or reactive radical species were employed for analysis. Local application of CDDP caused apoptotic cell death of marginal cells 3 days after CDDP treatment. Immunohistochemical analyses demonstrated activation of caspase-3 and -9, but not -8, and redistribution of cytochrome c in affected marginal cells, indicating a caspase-dependent, mitochondrion-mediated apoptotic pathway in marginal cells. Temporary expression of hydroxynonenal, nitrotyrosine and inducible nitric oxide synthase in the SV was observed at the induction of apoptosis in marginal cells. CDDP toxicity generates reactive radical species in the SV, which causes mitochondrial membrane permeabilization leading to apoptosis of marginal cells.[1]


  1. Mechanisms of apoptosis induced by cisplatin in marginal cells in mouse stria vascularis. Lee, J.E., Nakagawa, T., Kita, T., Kim, T.S., Iguchi, F., Endo, T., Shiga, A., Lee, S.H., Ito, J. ORL J. Otorhinolaryngol. Relat. Spec. (2004) [Pubmed]
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