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- W2103266525 abstract "Head and neck cancer including oral cancer is considered to develop by accumulated genetic alterations and the major pathway is cancerization from lesions such as intraepithelial dysplasia in oral leukoplakia and erythroplakia. The relationship of proliferation markers with the grading of dysplasia is uncertain. The involvement of EBV in oral carcinogenesis is not fully understood.The present study was designed to investigate the role of EBV and DNA Topoisomerase II proportional (DNA-Topo II proportional) during oral carcinogenesis and to examine the prognostic significance of these protein expressions in OSCCs.Using specific antibodies for EBV and DNA-Topo II proportional, we examined protein expressions in archival lesion tissues from 16 patients with oral epithelial dysplasia, 22 oral squamous cell carcinoma and 20 normal oral mucosa by immunohistochemistry. Clinical information was obtained through the computerized retrospective database from the tumor registry.DNA-Topo II proportional was expressed in all examined specimens. Analysis of Variance ANOVA revealed highly significant difference (P < 0.01) in young aged labial tissues and significant (P < or = 0.05) in gingival and not significant (P > 0.05) in inferior surface of tongue and in hard palatal tissues. Significant differences were observed between OEDs and NSE (P < 0.001) and SCCs and controls (P < 0.001), also, significant differences could be observed between SCCs and OEDs. DNA-Topo II proportional expression was significantly higher in tumors of low differentiation versus tumors of moderate and high differentiation (P < 0.001), DNA-Topo II proportional expression was correlated with age, tumor size, tumor stage, node metastasis and tumor differentiation, but not with gender and tumor site. None of normal squamous epithelium (NSE) expressed EBV. Heterogeneous reactivity for EBV was observed through the series of dysplasia and squamous cell carcinoma. Its expression increased progressively with lymph node metastasis and low tumor differentiation, but no significant association could be observed with other clinicopathological parameters. EBV protein expression was increased with elevated Topo II-proportional LI in OEDs and OSCCs. A tendency to positive correlation between EBV and Topo II proportional, variant expression was observed in OEDs but not in OSCCs.EBV and DNA Topo II-alphaLI expression are possible indicators in oral carcinogenesis and may be valuable diagnostic and prognostic indices in oral carcinoma." @default.
- W2103266525 created "2016-06-24" @default.
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- W2103266525 date "2008-01-01" @default.
- W2103266525 modified "2023-10-16" @default.
- W2103266525 title "The significance of Epstein Barr Virus (EBV) & DNA Topoisomerase II alpha (DNA-Topo II alpha) immunoreactivity in normal oral mucosa, Oral Epithelial Dysplasia (OED) and Oral Squamous Cell Carcinoma (OSCC)" @default.
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- W2103266525 doi "https://doi.org/10.1186/1746-1596-3-45" @default.
- W2103266525 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2611966" @default.
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- W2103266525 hasPublicationYear "2008" @default.
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