Epigenetic control of cellular senescence in disease: opportunities for therapeutic intervention

Stuart P. Atkinson; W. Nicol Keith

doi:10.1017/S1462399407000269

Epigenetic control of cellular senescence in disease: opportunities for therapeutic intervention

Published online by Cambridge University Press: 13 March 2007

Stuart P. Atkinson and

W. Nicol Keith

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Stuart P. Atkinson: Affiliation:
Centre for Oncology and Applied Pharmacology, University of Glasgow, Cancer Research UK Beatson Laboratories, Bearsden, Glasgow, G61 1BD, UK.
W. Nicol Keith*: Affiliation:
Centre for Oncology and Applied Pharmacology, University of Glasgow, Cancer Research UK Beatson Laboratories, Bearsden, Glasgow, G61 1BD, UK.
*: *Corresponding author: W. Nicol Keith, Centre for Oncology and Applied Pharmacology, University of Glasgow, Cancer Research UK Beatson Laboratories, Alexander Stone Building, Garscube Estate, Switchback Rd, Bearsden, Glasgow, G61 1BD, UK. Tel: +44 (0)141 330 4811; Fax: +44 (0)141 330 4127; E-mail: n.keith@beatson.gla.ac.uk

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Abstract

Understanding how senescence is established and maintained is an important area of study both for normal cell physiology and in tumourigenesis. Modifications to N-terminal tails of histone proteins, which can lead to chromatin remodelling, appear to be key to the regulation of the senescence phenotype. Epigenetic mechanisms such as modification of histone proteins have been shown to be sufficient to regulate gene expression levels and specific gene promoters can become epigenetically altered at senescence. This suggests that epigenetic mechanisms are important in senescence and further suggests epigenetic deregulation could play an important role in the bypass of senescence and the acquisition of a tumourigenic phenotype. Tumour suppressor proteins and cellular senescence are intimately linked and such proteins are now known to regulate gene expression through chromatin remodelling, again suggesting a link between chromatin modification and cellular senescence. Telomere dynamics and the expression of the telomerase genes are also both implicitly linked to senescence and tumourigenesis, and epigenetic deregulation of the telomerase gene promoters has been identified as a possible mechanism for the activation of telomere maintenance mechanisms in cancer. Recent studies have also suggested that epigenetic deregulation in stem cells could play an important role in carcinogenesis, and new models have been suggested for the attainment of tumourigenesis and bypass of senescence. Overall, proper regulation of the chromatin environment is suggested to have an important role in the senescence pathway, such that its deregulation could lead to tumourigenesis.

Type: Research Article
Information: Expert Reviews in Molecular Medicine , Volume 9 , Issue 7 , March 2007 , pp. 1 - 26

DOI: https://doi.org/10.1017/S1462399407000269 [Opens in a new window]
Copyright: Copyright © Cambridge University Press 2007

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Epigenetic control of cellular senescence in disease: opportunities for therapeutic intervention

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Epigenetic control of cellular senescence in disease: opportunities for therapeutic intervention

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