RESUMO
In 5 patients, a change in the genetic landscape from HPV16 positive high-grade squamous intraepithelial lesion (HSIL) to squamous cervical cancer was traced, which occurred in these patients within the period from 7 months to 5 years after diagnosing HSIL. MATERIALS AND METHODS: The DNA from paraffin blocks of dysplasia tissue and the tumor that emerged afterwards was used for the study, which was analyzed using the OncoScan FFPE microarray Assay Kit Affymetrix (USA) for genome-wide determination of gene abundance and 65 key somatic driver mutations of oncogenes and tumor suppressor genes. RESULTS: In the study of HSIL material, somatic mutations were observed in 4/5 cases, 18 different somatic driver mutations of the NRAS, EGFR, BRAF, KRAS, IDH2 oncogenes and TP53 suppressor genes were found and almost no CNA-Copy Number Aberration was identified. HSIL malignization is associated with the appearance of secondary driver mutations in oncogenes and tumor suppressor genes and a large number of structural and numerical CNA, the frequency of which correlates with the time of dysplasia malignization into cancer with a very high correlation coefficient râ¯=â¯0.98, Pâ¯=â¯0.004. The trees of dysplasia evolution into tumor were constructed for each patient. CONCLUSION: According to the results of the work, it is assumed that the initiation of the development of mucosa dysplastic changes is due to primary driver mutations. The formation of secondary driver mutations and CNA are genetic mechanisms of malignant transformation, while the scenarios of the evolution of dysplasia into a tumor are individual and very diverse.
Assuntos
Biomarcadores Tumorais/genética , Mutação , Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/complicações , Lesões Intraepiteliais Escamosas/patologia , Displasia do Colo do Útero/patologia , Neoplasias do Colo do Útero/patologia , Feminino , Seguimentos , Perfilação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Humanos , Infecções por Papillomavirus/virologia , Prognóstico , Lesões Intraepiteliais Escamosas/genética , Lesões Intraepiteliais Escamosas/virologia , Taxa de Sobrevida , Neoplasias do Colo do Útero/genética , Neoplasias do Colo do Útero/virologia , Displasia do Colo do Útero/genética , Displasia do Colo do Útero/virologiaRESUMO
The total chymotrypsin-like activity of proteasornes, the activity of 20S- and 26S-proteasome pools and calpains, and the expression of metalloproteinase PAPP-A in primary tumors and metastasized tissues were studied in 13 patients with epithelial ovarian cancer. It was shown that initiation of the process of tumor dissemination occurs against the background of active proteolytic processes; A decrease in activity of 26S-proteasomes and total calpain activity and increased expression ofmetalloproteinase PAPP-A in the primary tu mors were found in patients with ascites as compared with patients without ascites. The disease progression after treatment and achieved stabilization were found in patients with decreased activity of intracellular proteases and a high content of PAPP-A in the primary tumors.
