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Working on genomic stability: From the S-phase to mitosis
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Working on genomic stability: From the S-phase to mitosis
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Journal Article
Working on genomic stability: From the S-phase to mitosis
2020
Overview
[EN]Fidelity in chromosome duplication and segregation is indispensable for maintaining genomic stability and the perpetuation of life. Challenges to genome integrity jeopardize cell survival and are at the root of di erent types of pathologies, such as cancer. The following three main sources of genomic instability exist: DNA damage, replicative stress, and chromosome segregation defects. In response to these challenges, eukaryotic cells have evolved control mechanisms, also known as checkpoint systems, which sense under-replicated or damaged DNA and activate specialized DNA repair machineries. Cells make use of these checkpoints throughout interphase to shield genome integrity before mitosis. Later on, when the cells enter into mitosis, the spindle assembly checkpoint (SAC) is activated and remains active until the chromosomes are properly attached to the spindle apparatus to ensure an equal segregation among daughter cells. All of these processes are tightly interconnected and under strict regulation in the context of the cell division cycle. The chromosomal instability underlying cancer pathogenesis has recently emerged as a major source for understanding the mitotic processes that helps to safeguard genome integrity. Here, we review the special interconnection between the S-phase and mitosis in the presence of under-replicated DNA regions. Furthermore, we discuss what is known about the DNA damage response activated in mitosis that preserves chromosomal integrity.
Publisher
MDPI,MDPI AG
Subject
/ Biochemistry, Molecular Biology
/ Cancer
/ Cell Cycle Proteins - genetics
/ Chromosomal Instability - genetics
/ Chromosome Segregation - genetics
/ DNA
/ Genomes
/ Genomic Instability - genetics
/ Genomic Instability - physiology
/ Genomics
/ Humans
/ Kinases
/ Licenses
/ M Phase Cell Cycle Checkpoints - genetics
/ Mitosis
/ Proteins
/ Review
/ Spindle Apparatus - genetics
/ Yeast
