Sequential Cdk1 and Plk1 phosphorylation of caspase-8 triggers apoptotic cell death during mitosis
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Sequential Cdk1 and Plk1 phosphorylation of caspase-8 triggers apoptotic cell death during mitosis. / Matthess, Yves; Raab, Monika; Knecht, Rainald; Becker, Sven; Strebhardt, Klaus.
In: MOL ONCOL, Vol. 8, No. 3, 2014, p. 596-608.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Sequential Cdk1 and Plk1 phosphorylation of caspase-8 triggers apoptotic cell death during mitosis
AU - Matthess, Yves
AU - Raab, Monika
AU - Knecht, Rainald
AU - Becker, Sven
AU - Strebhardt, Klaus
N1 - Copyright © 2013 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
PY - 2014
Y1 - 2014
N2 - Caspase-8 is crucial for cell death induction, especially via the death receptor pathway. The dysregulated expression or function of caspase-8 can promote tumor formation, progression and treatment resistance in different human cancers. Here, we show procaspase-8 is regulated during the cell cycle through the concerted inhibitory action of Cdk1/cyclin B1 and polo-like kinase 1 (Plk1). By phosphorylating S387 in procaspase-8 Cdk1/cyclin B1 generates a phospho-epitope for the binding of the PBD of Plk1. Subsequently, S305 in procaspase-8 is phosphorylated by Plk1 during mitosis. Using an RNAi-based strategy we could demonstrate that the extrinsic cell death is increased upon Fas-stimulation when endogenous caspase-8 is replaced by a mutant (S305A) mimicking the non-phosphorylated form. Together, our data show that sequential phosphorylation by Cdk1/cyclin B1 and Plk1 decreases the sensitivity of cells toward stimuli of the extrinsic pathway during mitosis. Thus, the clinical Plk1 inhibitor BI 2536 decreases the threshold of different cancer cell types toward Fas-induced cell death.
AB - Caspase-8 is crucial for cell death induction, especially via the death receptor pathway. The dysregulated expression or function of caspase-8 can promote tumor formation, progression and treatment resistance in different human cancers. Here, we show procaspase-8 is regulated during the cell cycle through the concerted inhibitory action of Cdk1/cyclin B1 and polo-like kinase 1 (Plk1). By phosphorylating S387 in procaspase-8 Cdk1/cyclin B1 generates a phospho-epitope for the binding of the PBD of Plk1. Subsequently, S305 in procaspase-8 is phosphorylated by Plk1 during mitosis. Using an RNAi-based strategy we could demonstrate that the extrinsic cell death is increased upon Fas-stimulation when endogenous caspase-8 is replaced by a mutant (S305A) mimicking the non-phosphorylated form. Together, our data show that sequential phosphorylation by Cdk1/cyclin B1 and Plk1 decreases the sensitivity of cells toward stimuli of the extrinsic pathway during mitosis. Thus, the clinical Plk1 inhibitor BI 2536 decreases the threshold of different cancer cell types toward Fas-induced cell death.
KW - Apoptosis
KW - Caspase 8
KW - Cell Cycle
KW - Cell Cycle Proteins
KW - Cyclin-Dependent Kinases
KW - HeLa Cells
KW - Humans
KW - Mitosis
KW - Mutation
KW - Neoplasms
KW - Phosphorylation
KW - Protein-Serine-Threonine Kinases
KW - Proto-Oncogene Proteins
U2 - 10.1016/j.molonc.2013.12.013
DO - 10.1016/j.molonc.2013.12.013
M3 - SCORING: Journal article
C2 - 24484936
VL - 8
SP - 596
EP - 608
JO - MOL ONCOL
JF - MOL ONCOL
SN - 1574-7891
IS - 3
ER -