Details

Autor(en) / Beteiligte

• Knauer, Shirley K
• Krämer, Oliver H
• Knösel, Thomas
• Engels, Knut
• Rödel, Franz
• Kovács, Adorján F
• Dietmaier, Wolfgang
• Klein-Hitpass, Ludger
• Habtemichael, Negusse
• Schweitzer, Andrea
• Brieger, Jürgen
• Rödel, Claus
• Mann, Wolf
• Petersen, Iver
• Heinzel, Thorsten
• Stauber, Roland H

Titel

Nuclear export is essential for the tumor-promoting activity of survivin

Ist Teil von

• The FASEB journal, 2007-01, Vol.21 (1), p.207-216

Ort / Verlag

United States: The Federation of American Societies for Experimental Biology

Erscheinungsjahr

2007

Link zum Volltext

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• Survivin appears to function as an apoptosis inhibitor and a regulator of cell division during development and tumorigenesis. Here we report the molecular characterization of the nucleocytoplasmic transport of survivin and its potential implications for tumorigenesis. We identified an evolutionary conserved Crm1-dependent nuclear export signal (NES) in survivin. In dividing cells, the NES is essential for tethering survivin and the survivin/Aurora-B kinase complex to the mitotic machinery, which in turn appears to be essential for proper cell division. In addition, export seems to be required for the cytoprotective activity of survivin, as export-deficient survivin fails to protect tumor cells against chemo- and radiotherapy-induced apoptosis. These findings appear to be clinically relevant since preferential nuclear localization of survivin correlated with enhanced survival in colorectal cancer patients. Targeting survivin's nuclear export by the application of NES-specific antibodies promoted its nuclear accumulation and inhibited its cytoprotective function. We demonstrate that nuclear export is essential for the biological activity of survivin and promote the identification of molecular decoys to specifically interfere with survivin's nuclear export as potential anticancer therapeutics.--Knauer, S. K., Krämer, O. H., Knösel, T., Engels, K., Rödel, F., Kovács, A. F., Dietmaier, W., Klein-Hitpass, L., Habtemichael, N., Schweitzer, A., Brieger, J., Rödel, C., Mann, W., Petersen, I., Heinzel, T., Stauber, R. H. Nuclear export is essential for the tumor-promoting activity of survivin.