The optimization of sample treatment for spectral karyotyping with applications for human tumour cells

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Authors

LOJA Tomáš KUGLÍK Petr OLTOVÁ Alexandra ŠMUHAŘOVÁ Petra ZITTERBART Karel BAJČIOVÁ Viera VESELSKÁ Renata

Year of publication 2007
Type Article in Periodical
Magazine / Source Cytogenetic and Genome Research
MU Faculty or unit

Faculty of Science

Citation
Field Genetics and molecular biology
Keywords spectral karyotyping; molecular cytogenetics; aging procedure; protease pretreatment; human tumour cells; neuroblastoma; Wilms' tumour
Description 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.
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