title: The optimization of sample treatment for spectral karyotyping with applications for human tumour cells.
abstract: Spectral karyotyping (SKY) represents an important tool for the investigation of the complex chromosomal rearrangements (CCRs) in many human malignancies which may be difficult to characterize by conventional banding techniques. The main goal of our work was to optimize the most important steps in the preparation of molecular cytogenetic slides for a SKY protocol. This approach consisted of optimization of both the aging procedure and protease pretreatment of the slides, with special regard given to the preservation of chromosome structure and shape, as well as to the intensity of hybridization signals. The best results were obtained with a chemical aging procedure using SSC or ethanol in combination with trypsin pretreatment applied at a higher concentration for a shorter period of pretreatment. A resulting protocol for SKY also applicable to human solid tumour cells was subsequently proposed. The practical potential of the SKY technique was demonstrated on examples of two types of human embryonal tumours--neuroblastoma and Wilms' tumour, in which some kinds of chromosomal aberrations were not detectable by means of classic cytogenetic methods.
authors.affiliation: Laboratory of Tumor Biology and Genetics, Department of Genetics and Molecular Biology, Institute of Experimental Biology, School of Science, Masaryk University, Brno, Czech Republic.
authors.forename: T
authors.initials: T
authors.lastname: Loja
authors.forename: P
authors.initials: P
authors.lastname: Kuglik
authors.forename: A
authors.initials: A
authors.lastname: Oltova
authors.forename: P
authors.initials: P
authors.lastname: Smuharova
authors.forename: K
authors.initials: K
authors.lastname: Zitterbart
authors.forename: V
authors.initials: V
authors.lastname: Bajciova
authors.forename: R
authors.initials: R
authors.lastname: Veselska
mesh_terms: D001773:Blood Cells / Q000166:cytology / Q000187:drug effects; D016922:Cellular Senescence / Q000187:drug effects; D002648:Child; D006801:Humans; D007211:Indoles; D008677:Metaphase / Q000187:drug effects; D009447:Neuroblastoma / Q000235:genetics* / Q000473:pathology*; D009693:Nucleic Acid Hybridization; D010447:Peptide Hydrolases / Q000494:pharmacology; D013048:Specimen Handling / Q000379:methods*; D032681:Spectral Karyotyping / Q000379:methods*; D009396:Wilms Tumor / Q000235:genetics* / Q000473:pathology*
chemical_list: D007211:Indoles; C007293:DAPI; D010447:Peptide Hydrolases