Pathways for maintenance of telomeres and common fragile sites during DNA replication stress
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Pathways for maintenance of telomeres and common fragile sites during DNA replication stress. / Özer, Özgün; Hickson, Ian D.
In: Open Biology, Vol. 8, No. 4, 180018, 2018.Research output: Contribution to journal › Review › Research › peer-review
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TY - JOUR
T1 - Pathways for maintenance of telomeres and common fragile sites during DNA replication stress
AU - Özer, Özgün
AU - Hickson, Ian D.
PY - 2018
Y1 - 2018
N2 - Oncogene activation during tumour development leads to changes in the DNA replication programme that enhance DNA replication stress. Certain regions of the human genome, such as common fragile sites and telomeres, are particularly sensitive to DNA replication stress due to their inherently 'difficult-to-replicate' nature. Indeed, it appears that these regions sometimes fail to complete DNA replication within the period of interphase when cells are exposed to DNA replication stress. Under these conditions, cells use a salvage pathway, termed 'mitoticDNArepair synthesis (MiDAS)', to complete DNA synthesis in the early stages of mitosis. If MiDAS fails, the ensuing mitotic errors threaten genome integrity and cell viability. Recent studies have provided an insight into howMiDAS helps cells to counteractDNAreplication stress. However, our understanding of the molecular mechanisms and regulation of MiDAS remain poorly defined. Here, we provide an overview of how DNA replication stress triggers MiDAS, with an emphasis on how common fragile sites and telomeres are maintained. Furthermore, we discuss how a better understanding of MiDAS might reveal novel strategies to target cancer cells that maintain viability in the face of chronic oncogene-induced DNA replication stress.
AB - Oncogene activation during tumour development leads to changes in the DNA replication programme that enhance DNA replication stress. Certain regions of the human genome, such as common fragile sites and telomeres, are particularly sensitive to DNA replication stress due to their inherently 'difficult-to-replicate' nature. Indeed, it appears that these regions sometimes fail to complete DNA replication within the period of interphase when cells are exposed to DNA replication stress. Under these conditions, cells use a salvage pathway, termed 'mitoticDNArepair synthesis (MiDAS)', to complete DNA synthesis in the early stages of mitosis. If MiDAS fails, the ensuing mitotic errors threaten genome integrity and cell viability. Recent studies have provided an insight into howMiDAS helps cells to counteractDNAreplication stress. However, our understanding of the molecular mechanisms and regulation of MiDAS remain poorly defined. Here, we provide an overview of how DNA replication stress triggers MiDAS, with an emphasis on how common fragile sites and telomeres are maintained. Furthermore, we discuss how a better understanding of MiDAS might reveal novel strategies to target cancer cells that maintain viability in the face of chronic oncogene-induced DNA replication stress.
KW - Alternative lengthening of telomeres
KW - Cancer
KW - Common fragile sites
KW - Homologous recombination
KW - RAD52
U2 - 10.1098/rsob.180018
DO - 10.1098/rsob.180018
M3 - Review
C2 - 29695617
AN - SCOPUS:85055413808
VL - 8
JO - Open Biology
JF - Open Biology
SN - 2046-2441
IS - 4
M1 - 180018
ER -
ID: 209745434