ArticleMethods in molecular biology (Clifton, N.J.)2023
Using Sister Chromatid Exchange Assay to Detect Homologous Recombination Deficiency in Epigenetically Deregulated Urothelial Carcinoma Cells.
Article in Methods in molecular biology (Clifton, N.J.), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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2 authors at 1 institution in 1 country.
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Abstract
Sister chromatid exchange (SCE) is the process of exchanging regions between two sister chromatids during DNA replication. Exchanges between replicated chromatids and their sisters can be visualized in cells when DNA synthesis in one chromatid is labelled by 5-bromo-2'-deoxyuridine (BrdU). Homologous recombination (HR) is considered as the principal mechanism responsible for the sister chromatid exchange (SCE) upon replication fork collapse, and therefore SCE frequency upon genotoxic conditions reflects the capacity of HR repair to respond to replication stress. During tumorigenesis, inactivating mutations or altered transcriptome can affect a plethora of epigenetic factors that participate in DNA repair processes, and there are an increasing number of reports which demonstrate a link between epigenetic deregulation in cancer and homologous recombination deficiency (HRD). Therefore, the SCE assay can provide valuable information regarding the HR functionality in tumors with epigenetic deficiencies. In this chapter, we provide a method to visualize SCEs. The technique outlined below is characterized by high sensitivity and specificity and has been successfully applied to human bladder cancer cell lines. In this context, this technique could be used to characterize the dynamics of HR repair in tumors with deregulated epigenome.
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