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Personalised Medicine pp 41–58Cite as

Role of Protein Linked DNA Breaks in Cancer

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Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 1007))

Abstract

Topoisomerases are a group of specialized enzymes that function to maintain DNA topology by introducing transient DNA breaks during transcription and replication. As a result of abortive topoisomerases activity, topoisomerases catalytic intermediates may be trapped on the DNA forming topoisomerase cleavage complexes (Topcc). Topoisomerases trapping on the DNA is the mode of action of several anticancer drugs, it lead to formation of protein linked DAN breaks (PDBs). PDBs are now considered as one of the most dangerous forms of endogenous DNA damage and a major threat to genomic stability. The repair of PDBs involves both the sensing and repair pathways. Unsuccessful repair of PDBs leads to different signs of genomic instabilities such as chromosomal rearrangements and cancer predisposition. In this chapter we will summarize the role of topoisomerases induced PDBs, identification and signaling, repair, role in transcription. We will also discuss the role of PDBs in cancer with a special focus on prostate cancer.

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  1. Center for Genomics, Helmy Institute for Medical Sciences, Zewail City of Science and Technology, Giza, Egypt

    Walaa R. Allam, Mohamed E. Ashour, Amr A. Waly & Sherif El-Khamisy

  2. Krebs Institute and Sheffield Institute for Nucleic Acids, Department of Molecular Biology and Biotechnology, Firth Court, University of Sheffield, Sheffield, S10 2TN, UK

    Sherif El-Khamisy

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Allam, W.R., Ashour, M.E., Waly, A.A., El-Khamisy, S. (2017). Role of Protein Linked DNA Breaks in Cancer. In: El-Khamisy, S. (eds) Personalised Medicine. Advances in Experimental Medicine and Biology, vol 1007. Springer, Cham. https://doi.org/10.1007/978-3-319-60733-7_3

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