PMID- 20809313 OWN - NLM STAT- MEDLINE DCOM- 20101214 LR - 20131121 IS - 1940-6029 (Electronic) IS - 1064-3745 (Linking) VI - 659 DP - 2010 TI - Simultaneous visualization of FISH signals and bromo-deoxyuridine incorporation by formamide-free DNA denaturation. PG - 203-18 LID - 10.1007/978-1-60761-789-1_14 [doi] AB - The replication timing of different DNA sequences in the mammalian cell nucleus is a tightly regulated system, which affects important cellular processes such as genes expression, chromatin epigenetic marking, and maintenance of chromosome structure. For this reason, it is important to study the replication properties of specific sequences, to determine for example, if the replication timing varies in different tissues, or in the presence of specific reagents, such as hormones, or other biologically active molecules. In this chapter, we present a technique, which allows identification of specific DNA sequences by fluorescence in situ hybridization (FISH) and simultaneously analyses the incorporation of a thymidine analogue, 5-bromo-2-deoxyuridine (BrdU), to mark DNA replication. First, tissue culture cells are synchronized at the beginning of the S-phase. BrdU is then added, either at specific time-points during S-phase or during the whole of the cell cycle. After harvesting the cells, the chromosomal DNA is hybridized to FISH probes that identify specific DNA sequences; this is performed without the teratogen formamide normally used in FISH. Finally, the cell preparations are analysed with an epifluorescence microscope to determine if the sequence of interest incorporates BrdU and in which point of the S-phase. FAU - Moralli, Daniela AU - Moralli D AD - Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK. FAU - Monaco, Zoia L AU - Monaco ZL LA - eng PT - Journal Article PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 RN - 0 (DNA Probes) RN - 38966-21-1 (Aphidicolin) RN - 9007-49-2 (DNA) RN - G34N38R2N1 (Bromodeoxyuridine) SB - IM MH - Aphidicolin/metabolism MH - Bromodeoxyuridine/*metabolism MH - Cell Line MH - DNA/*genetics/metabolism MH - DNA Probes/metabolism MH - In Situ Hybridization, Fluorescence/*methods MH - Nucleic Acid Denaturation MH - Time Factors EDAT- 2010/09/03 06:00 MHDA- 2010/12/16 06:00 CRDT- 2010/09/03 06:00 PHST- 2010/09/03 06:00 [entrez] PHST- 2010/09/03 06:00 [pubmed] PHST- 2010/12/16 06:00 [medline] AID - 10.1007/978-1-60761-789-1_14 [doi] PST - ppublish SO - Methods Mol Biol. 2010;659:203-18. doi: 10.1007/978-1-60761-789-1_14.