These authors contributed equally to this study
Dynamic intracellular survivin in oral squamous cell carcinoma: underlying molecular mechanism and potential as an early prognostic marker†
Version of Record online: 2 MAR 2007
Copyright © 2007 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
The Journal of Pathology
Volume 211, Issue 5, pages 532–540, April 2007
How to Cite
Engels, K., Knauer, S., Metzler, D., Simf, C., Struschka, O., Bier, C., Mann, W., Kovács, A. and Stauber, R. (2007), Dynamic intracellular survivin in oral squamous cell carcinoma: underlying molecular mechanism and potential as an early prognostic marker. J. Pathol., 211: 532–540. doi: 10.1002/path.2134
No conflicts of interest were declared.
- Issue online: 8 MAR 2007
- Version of Record online: 2 MAR 2007
- Manuscript Accepted: 4 DEC 2006
- Manuscript Revised: 28 NOV 2006
- Manuscript Received: 19 JUL 2006
- BMBF. Grant Number: NGFN01GS0451
- Deutsche Krebshilfe. Grant Number: FKZ:102362
- Stiftung Tumorforschung-Kopf-Hals
- head and neck cancer;
- cancer therapy;
- cell cycle
Survivin functions as an apoptosis inhibitor and a regulator of cell division in many tumours. The intracellular localization of survivin in tumours has been suggested as a prognostic marker. However, current reports are inconsistent and the underlying molecular mechanisms are not understood. The present study has examined the localization and prognostic value of nuclear and cytoplasmic survivin in the pre-therapeutic biopsies from 71 oral and oropharyngeal squamous carcinoma (OSCC) patients. Statistical analysis indicated that preferential nuclear versus cytoplasmic survivin correlated with favourable versus unfavourable disease outcome. Uni- and multi-variate analysis showed that in contrast to total survivin expression, the difference between nuclear and cytoplasmic survivin was a strong predictor for relapse-free survival (p = 0.0003). As a potential underlying molecular mechanism, it is shown in OSCC cell lines that predominantly cytoplasmic survivin mediates protection against chemo- and radio-therapy-induced apoptosis. Importantly, the cytoplasmic localization of survivin is regulated by its nuclear export signal (NES), and export-deficient nuclear survivin is not cytoprotective. This study suggests that the difference between cytoplasmic and nuclear survivin is an indicator for survivin activity in tumour cells. Thus, this difference may serve as a predictive marker of outcome in OSCC patients undergoing multi-modality therapy. The pharmacogenetic interference with survivin's cytoplasmic localization is also to be pursued as a potential therapeutic strategy. Copyright © 2007 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.