Affiliations: [a] Laboratory of Molecular and Cell Biology, S.P. Kapitsa Research Institute of Technology, Ulyanovsk State University, Ulyanovsk, Russia | [b] Department of General and Clinical Pharmacology and Microbiology, Faculty of Medicine, Ulyanovsk State University, Ulyanovsk, Russia | [c] Second Surgical Department, Ulyanovsk Oncology Center, Ulyanovsk, Russia | [d] Department of Biology, Ecology and Natural Resources Management, Faculty of Ecology, Ulyanovsk State University, Ulyanovsk, Russia
Correspondence:
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Corresponding author: Eugenia Rastorgueva, Laboratory of Molecular and Cell Biology, S.P. Kapitsa Research Institute of Technology, Ulyanovsk State University, 42 Leo Tostoy St., Ulyanovsk, 432017, Russia. Tel.: +7 9033386189; E-mail: rastorgueva.e.v@yandex.ru.
Abstract: In this paper, we have studied the role of chromosomal abnormalities in the expression of small nucleolar RNAs (snoRNAs) of radioresistant (K562) and radiosensitive (HL-60) leukemia cell line. Cells were exposed to an X-ray dose of 4 Gy. SnoRNA expression was investigated using NGS sequencing. The distribution of expressed snoRNAs on chromosomes has been found to be different for two cell lines. The most significant differences in the expression of snoRNAs were found in the K562 cell line based on the analysis of the dynamics of log2fc values. The type of clustering, the number and type of snoRNAs slightly differed in the chromosomes with trisomy and monosomy and had a pronounced difference in pairs with marker chromosomes in both cell lines. In this study, we have demonstrated that chromosomal abnormalities alter the expression of snoRNA after irradiation. Trisomies and monosomies do not have such a noticeable effect on the expression of snoRNAs as the presence of marker chromosomes.
Keywords: snoRNA, radioresistance, radiosensitivity, cancer cells, marker chromosomes
