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Tarasov V.A.,Russian Academy of Sciences | Matishov D.G.,Russian Academy of Sciences | Shin E.F.,Russian Academy of Sciences | Boyko N.V.,Russian Academy of Sciences | And 6 more authors.
Russian Journal of Genetics | Year: 2014

Applying the method of multiple parallel sequencing on the MiSeq platform (Illumina, United States), a comparative analysis of miRNA expression in tumor and normal colon tissue cells was performed. Forty miRNAs aberrantly expressed in cancer were detected. Among them, 15 and 25 miRNAs showed increased and decreased expression, respectively, for all or most of the cases. Sixteen miRNA clusters were identified, which showed a coordinated or incompletely coordinated aberrant expression in colorectal cancer cells. In two (miR-183/182 and miR-106b/25) and four (miR-143/145, miR-497/195, miR-30e/30c-1, and miR-30a/30c-2) miRNA clusters, respectively, a statistically significant coordinated increase or decrease in expression was registered for all miRNAs within the corresponding cluster. Three aberrantly expressed well-known miRNAs (miR-100-5p, miR-30d-5p, and miR-204-5p) were identified, which, however, had never before been associated with colorectal cancer. The obtained results demonstrate the potential and promising application of 6 miRNA clusters with coordinated aberrant expression as markers for colorectal cancer. © 2014, Pleiades Publishing, Inc.

Frantsiyants E.M.,Rostov Scientific Research Institute of Oncology | Komarova E.F.,Rostov Scientific Research Institute of Oncology | Pozdnyakova V.V.,Rostov Scientific Research Institute of Oncology | Rozenko L.Y.,Rostov Scientific Research Institute of Oncology | And 3 more authors.
Molecular Biology | Year: 2014

Skin melanoma is believed to arise from the malignant development of congenital or acquired pigmented nevi under the action of various causative agents. A study of samples of skin melanoma tissues, as well as pigmented nevus tissues that were obtained from patients of both sexes, was carried out using enzymelinked immunosorbent assay. The study included a comparative analysis of activities of plasmin and plasminogen, as well as the activities and concentrations of urokinase type plasminogen activator, tissue-type plasminogen activator, and an inhibitor of plasminogen activator, as well as the levels of a number of growth factors, including vascular endothelial growth factor and its receptor, epidermal growth factor and its receptor, transforming growth factor, fibroblast growth factor, and finally insulin-like growth factors 1 and 2. The data underpin the possibility of malignant transformation of skin nevi and indicate provisional mechanisms of tumorigenesis. These results are useful for the development of preventive and risk evaluation methods for neoplastic transformation. © 2014 Pleiades Publishing, Inc.

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