title: Single-cell analysis of aneuploidy events using yeast whole chromosome painting probes (WCPPs).
abstract: Aneuploidy is considered a widespread genetic variation in such cell populations as yeast strains, cell lines and cancer cells, and spontaneous changes in the chromosomal copy number may have implications for data interpretation. Thus, aneuploidy monitoring is essential during routine laboratory practice, especially while conducting biochemical and/or gene expression analyses. In the present study, we constructed a panel of whole chromosome painting probes (WCPPs) to monitor aneuploidy in a single yeast Saccharomyces cerevisiae cell. The WCPP-based system was validated using "normal" haploid and diploid cells, as well as disomic cells both with and without cell synchronisation. FISH that utilised WCPPs was combined with DNA cell cycle analysis (imaging cytometry) to provide a detailed analysis of signal variability during the cell cycle. Chromosome painting can be utilised to detect spontaneously formed disomic chromosomes and study aneuploidy-promoting conditions. For example, the frequency of disomic chromosomes was increased in cells lacking NAD(+)-dependent histone deacetylase Sir2p compared with wild-type cells (p<0.05). In conclusion, WCPPs may be considered to be a powerful molecular tool to identify individual genomic differences. Moreover, the WCPP-based system may be used at the single-cell level of analysis to supplement array-based techniques and high-throughput analyses at the population scale.
authors: Department of Genetics, University of Rzeszow, Rejtana 16C, 35-959 Rzeszow, Poland. Electronic address: mawnuk@gmail.com.
authors: Maciej
authors: M
authors: Wnuk
authors: Department of Genetics, University of Rzeszow, Rejtana 16C, 35-959 Rzeszow, Poland.
authors: Beata
authors: B
authors: Miedziak
authors: Department of Genetics, University of Rzeszow, Rejtana 16C, 35-959 Rzeszow, Poland.
authors: Klaudia
authors: K
authors: Kulak
authors: Department of Genetics, University of Rzeszow, Rejtana 16C, 35-959 Rzeszow, Poland.
authors: Anita
authors: A
authors: Panek
authors: Department of Genetics, University of Rzeszow, Rejtana 16C, 35-959 Rzeszow, Poland.
authors: Ewelina
authors: E
authors: Golec
authors: Department of Genetics, University of Rzeszow, Rejtana 16C, 35-959 Rzeszow, Poland.
authors: Anna
authors: A
authors: Deregowska
authors: Department of Genetics, University of Rzeszow, Rejtana 16C, 35-959 Rzeszow, Poland.
authors: Jagoda
authors: J
authors: Adamczyk
authors: Department of Biochemistry and Cell Biology, University of Rzeszow, Poland.
authors: Anna
authors: A
authors: Lewinska
mesh_terms: D000782:Aneuploidy; D020223:Chromosome Painting / Q000379:methods*; D015342:DNA Probes; D017404:In Situ Hybridization, Fluorescence / Q000379:methods*; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D059010:Single-Cell Analysis / Q000379:methods*
chemical_list: D015342:DNA Probes
keywords: Aneuploidy; Fluorescence in situ hybridisation; Whole chromosome painting probes; Yeast