PMID- 15502216 OWN - NLM STAT- MEDLINE DCOM- 20050222 LR - 20190902 IS - 1064-3745 (Print) IS - 1064-3745 (Linking) VI - 291 DP - 2005 TI - The comet-FISH technique: a tool for detection of specific DNA damage and repair. PG - 107-19 AB - The comet-FISH technique described in this protocol is a tool to detect genome region-specific DNA damage and repair. It is a combination of two established techniques, the comet assay (or single-cell gel electrophoresis, or the single-cell gel test), to separate highly fragmented from moderately or nonfragmented DNA and to measure it, and fluorescence in situ hybridization (FISH), to specifically label DNA sequences of interest. Comet-FISH exists in two versions, based on the neutral and the alkaline comet assays. A detailed description of the comet assay is given in Chapter 9, so readers who are not familiar with this technique can work directly with the protocol described here, without referring to additional protocols reported elsewhere. The neutral version of the comet assay detects double-strand breaks, while the alkaline version detects both double- and single-strand breaks as well as abasic sites or sites of incomplete repair. This chapter also details cell preparation and production of the hybridization probes adapted to the comet-FISH technique. Finally, microscopic analysis of comet-FISH results is described, and possible procedures of quantification of the specific DNA damage are presented. FAU - Rapp, Alexander AU - Rapp A AD - Department for Single Cell and Single Molecule Techniques, Institute for Molecular Biotechnology Jena, Germany. FAU - Hausmann, Michael AU - Hausmann M FAU - Greulich, Karl Otto AU - Greulich KO LA - eng PT - Journal Article PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 SB - IM MH - Animals MH - Comet Assay/*methods MH - *DNA Damage MH - *DNA Repair MH - Humans MH - In Situ Hybridization, Fluorescence/*methods EDAT- 2004/10/27 09:00 MHDA- 2005/02/23 09:00 CRDT- 2004/10/27 09:00 PHST- 2004/10/27 09:00 [pubmed] PHST- 2005/02/23 09:00 [medline] PHST- 2004/10/27 09:00 [entrez] AID - 1-59259-840-4:107 [pii] AID - 10.1385/1-59259-840-4:107 [doi] PST - ppublish SO - Methods Mol Biol. 2005;291:107-19. doi: 10.1385/1-59259-840-4:107.