Abstract
To evaluate the initial molecular genetic signs of malignancy of verrucous leukoplakia (VL). The study of VL was carried out on biopsies of 21 patients with the diagnoses of verrucous hyperplasia (VH) (15 cases - 71.4%) and verrucous carcinoma (VC) (6 cases - 28.5%). Tissue antigens were determined using mouse monoclonal antibodies to the Ki-67 protein (MM1, Diagnostic Biosystems). Telomerase activity was determined using rabbit immunoglobulin (TRT, Abbiotec). The amplification of the TERC (Telomerase RNA Component) portion of the RNA of the third chromosome was studied by the FISH method. In the studied groups, high cell proliferation and significant differences between HC and VC were revealed. The amplification of TERC by the FISH method made it possible to carry out differential diagnostics between VG and VC. According to the results of the study, the amplification of the TERC gene was detected in 100% in VC and in 20% in VG. The FISH method makes it possible to detect VL malignancy at an early stage. Amplification of the TERC gene is characteristic of malignant transformation of epithelial cells in VC. In IG, as a rule, there was no amplification, which can serve as evidence of the benign nature of the pathology of COP.
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