HDAC inhibitor-induced activation of NF-κB prevents apoptotic response of E1A + Ras-transformed cells to proapoptotic stimuli
HDAC inhibitors (HDACIs) are capable of suppressing the cell growth of tumour cells due to the induction of apoptosis and/or cell cycle arrest. This allows of considering HDACIs as promising agents for tumour therapy. The final outcome – apoptotic cell death or cell cycle arrest – depends on the typ...
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Published in | The international journal of biochemistry & cell biology Vol. 42; no. 11; pp. 1847 - 1855 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Netherlands
Elsevier Ltd
01.11.2010
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Subjects | |
Online Access | Get full text |
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Summary: | HDAC inhibitors (HDACIs) are capable of suppressing the cell growth of tumour cells due to the induction of apoptosis and/or cell cycle arrest. This allows of considering HDACIs as promising agents for tumour therapy. The final outcome – apoptotic cell death or cell cycle arrest – depends on the type of tumour and cellular context. In this report, we addressed the issue by analysing effects produced in E1A
+
Ras-transformed MEF cells by HDAC inhibitors sodium butyrate (NaB), Trichostatin A (TSA) and some others. It has been shown that the HDACIs induced cell cycle arrest in E1A
+
Ras-transformed cells but not apoptosis. The antiapoptotic effect of HDACIs is likely to be a result of NF-κB-dependent signaling pathway activation. HDACI-induced activation of NF-κB takes place in spite of a deregulated PI3K/Akt pathway in E1A
+
Ras cells, suggesting an alternative mechanism for the activation of NF-κB based on acetylation. HDACI-dependent activation of NF-κB prevents the induction of apoptosis by cytostatic agent adriamycin and serum deprivation. Accordingly, suppression of NF-κB activity in HDACI-arrested cells by the chemical inhibitor CAPE or RelA-siRNA resulted in the induction of an apoptotic programme. Thus, our findings suggest that the activation of the NF-κB pathway in HDACI-treated E1A
+
Ras-transformed cells blocks apoptosis and may thereby play a role in triggering the programme of cell cycle arrest and cellular senescence. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1357-2725 1878-5875 |
DOI: | 10.1016/j.biocel.2010.08.001 |