Cisplatin-induced apoptosis in auditory cells: Role of death receptor and mitochondrial pathways

Prasad Devarajan, Michelle Savoca, M. Patricia Castaneda, Moon Soo Park, Nora Esteban-Cruciani, Gilda Kalinec, Federico Kalinec

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

Cisplatin, a commonly used chemotherapeutic agent, has a major limitation due to its ototoxicity. Previous studies have shown that cisplatin induces apoptosis in auditory sensory cells, but the underlying mechanisms remain to be elucidated. In this study, cisplatin was found to induce apoptosis in a cochlear cell line, in a dose- and duration-dependent manner. Specific caspase assays revealed an early (6 h) but transient increase in caspase 8 activity, and a delayed (12 h) increase in caspase 9 activity. The enhanced caspase 8 activity was preceded by upregulation of p53 expression, and coincided with cleavage of Bid to its truncated form. This was followed temporally by activation and mitochondrial translocation of Bax, induction of mitochondrial permeability transition, release of cytochrome c into the cytosol, activation of caspase 9, and entry into the execution phase of apoptosis. Our results indicate the involvement of both the death receptor mechanisms as well as mitochondrial pathways in cisplatin-induced apoptosis of auditory cells in an in vitro model system.

Original languageEnglish (US)
Pages (from-to)45-54
Number of pages10
JournalHearing Research
Volume174
Issue number1-2
DOIs
StatePublished - Dec 2002

Fingerprint

Death Domain Receptors
Cisplatin
Cell Death
Apoptosis
Caspase 9
Caspase 8
Cochlea
Caspases
Cytochromes c
Cytosol
Permeability
Up-Regulation
Cell Line

Keywords

  • Apoptosis
  • Auditory cell
  • Cisplatin
  • Ototoxicity

ASJC Scopus subject areas

  • Sensory Systems

Cite this

Devarajan, P., Savoca, M., Castaneda, M. P., Park, M. S., Esteban-Cruciani, N., Kalinec, G., & Kalinec, F. (2002). Cisplatin-induced apoptosis in auditory cells: Role of death receptor and mitochondrial pathways. Hearing Research, 174(1-2), 45-54. https://doi.org/10.1016/S0378-5955(02)00634-2

Cisplatin-induced apoptosis in auditory cells : Role of death receptor and mitochondrial pathways. / Devarajan, Prasad; Savoca, Michelle; Castaneda, M. Patricia; Park, Moon Soo; Esteban-Cruciani, Nora; Kalinec, Gilda; Kalinec, Federico.

In: Hearing Research, Vol. 174, No. 1-2, 12.2002, p. 45-54.

Research output: Contribution to journalArticle

Devarajan, P, Savoca, M, Castaneda, MP, Park, MS, Esteban-Cruciani, N, Kalinec, G & Kalinec, F 2002, 'Cisplatin-induced apoptosis in auditory cells: Role of death receptor and mitochondrial pathways', Hearing Research, vol. 174, no. 1-2, pp. 45-54. https://doi.org/10.1016/S0378-5955(02)00634-2
Devarajan P, Savoca M, Castaneda MP, Park MS, Esteban-Cruciani N, Kalinec G et al. Cisplatin-induced apoptosis in auditory cells: Role of death receptor and mitochondrial pathways. Hearing Research. 2002 Dec;174(1-2):45-54. https://doi.org/10.1016/S0378-5955(02)00634-2
Devarajan, Prasad ; Savoca, Michelle ; Castaneda, M. Patricia ; Park, Moon Soo ; Esteban-Cruciani, Nora ; Kalinec, Gilda ; Kalinec, Federico. / Cisplatin-induced apoptosis in auditory cells : Role of death receptor and mitochondrial pathways. In: Hearing Research. 2002 ; Vol. 174, No. 1-2. pp. 45-54.
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