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      저자 : Nikolai V. Litviakov (검색결과 1 건)
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        Amplification of Stem Genes: New Potential Metastatic Makers in Patients with an Early Form of Breast Cancer

        Matvey M. Tsyganov,Marina K. Ibragimova,Alina M. Pevzner,Artem V. Doroshenko,Elena M. Slonimskaya,Nikolai V. Litviakov 대한의학회 2019 Journal of Korean medical science Vol.34 No.49

        Background: According to our previous studies, the presence of amplifications of stem genes can lead to their ectopic expression and this is associated with an increased activity of tumor stem cells in these patients. This leads to a high aggressiveness of the tumor and the development of metastatic disease. The aim was to evaluate the prognostic significance of the presence of amplifications of stem genes and their expression in patients with early breast cancer (BC). Methods: The study included 28 patients with T1NxM0 BC. We used surgical specimens, including formalin-fixed paraffin-embedded archive materials, for 8 patients. A microarray analysis was performed on high-density DNA chips from CytoScanHDArray to assess the status of copy number aberration (CNA) of stem genes locus. Gene expression was assessed using RT-qPCR. Results: CNA analysis of the studied tumors of patients without chemotherapy showed that 17/18 patients without metastases did not have two or more amplifications of chromosomal regions. Ten patients had visceral metastases. In 9/10 of these patients in the primary tumor there were two or more amplifications of the stem genes locus. Two or more amplifications of stem genes locus were found in 12 patients with stage I. Hematogenous metastases did not develop in all patients. Comparison of metastasis-free survival rates in groups of patients with 1 or without amplifications and with two or more amplifications showed statistically significant differences (P = 0.01). Conclusion: Our studies have shown that the presence of clones with two or more amplifications of stem gene in patients with BC T1NxM0 has a significant prognostic value and determines an unfavorable prognosis for distant metastasis.

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