PMID- 37549036 OWN - NLM STAT- MEDLINE DCOM- 20240308 LR - 20240308 IS - 2666-1667 (Electronic) IS - 2666-1667 (Linking) VI - 4 IP - 3 DP - 2023 Sep 15 TI - exo-FISH: Protocol for detecting DNA breaks in repetitive regions of mammalian genomes. PG - 102487 LID - S2666-1667(23)00454-9 [pii] LID - 10.1016/j.xpro.2023.102487 [doi] LID - 102487 AB - Detecting DNA breaks in defined regions of the genome is critical to advancing our understanding of genome stability maintenance. Here, we present exo-FISH, a protocol to label exposed single-stranded DNA in defined repetitive regions of mammalian genomes by combining in vitro restriction enzyme digestion on fixed cells with fluorescence in situ hybridization (FISH). We describe steps for cell harvesting and fixation, slide treatments, and FISH probe hybridization. We then detail procedures for imaging and analysis. For complete details on the use and execution of this protocol, please refer to Saayman et al. (2023).(1). CI - Copyright (c) 2023 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Saayman, Xanita AU - Saayman X AD - Sir William Dunn School of Pathology, University of Oxford, Oxford, UK. Electronic address: xanitasaayman@gmail.com. FAU - Graham, Emily AU - Graham E AD - Sir William Dunn School of Pathology, University of Oxford, Oxford, UK. FAU - Leung, Chin Wei Brian AU - Leung CWB AD - Sir William Dunn School of Pathology, University of Oxford, Oxford, UK. FAU - Esashi, Fumiko AU - Esashi F AD - Sir William Dunn School of Pathology, University of Oxford, Oxford, UK. Electronic address: fumiko.esashi@path.ox.ac.uk. LA - eng PT - Journal Article DEP - 20230806 PL - United States TA - STAR Protoc JT - STAR protocols JID - 101769501 RN - 9007-49-2 (DNA) RN - 0 (DNA, Single-Stranded) SB - IM MH - Animals MH - In Situ Hybridization, Fluorescence/methods MH - *DNA/genetics MH - *Repetitive Sequences, Nucleic Acid/genetics MH - DNA, Single-Stranded MH - DNA Breaks MH - Mammals/genetics PMC - PMC10425934 OTO - NOTNLM OT - Cell Biology OT - In Situ Hybridization OT - Microscopy OT - Molecular Biology OT - Single Cell COIS- Declaration of interests The authors declare no competing interests. EDAT- 2023/08/07 19:10 MHDA- 2024/03/08 06:43 PMCR- 2023/08/06 CRDT- 2023/08/07 12:35 PHST- 2023/04/14 00:00 [received] PHST- 2023/06/07 00:00 [revised] PHST- 2023/07/12 00:00 [accepted] PHST- 2024/03/08 06:43 [medline] PHST- 2023/08/07 19:10 [pubmed] PHST- 2023/08/07 12:35 [entrez] PHST- 2023/08/06 00:00 [pmc-release] AID - S2666-1667(23)00454-9 [pii] AID - 102487 [pii] AID - 10.1016/j.xpro.2023.102487 [doi] PST - ppublish SO - STAR Protoc. 2023 Sep 15;4(3):102487. doi: 10.1016/j.xpro.2023.102487. Epub 2023 Aug 6.