Apurinic/apyrimidinic endonuclease 1 (APE1) is overexpressed in malignant transformation of salivary gland pleomorphic adenoma

European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
Leorik Pereira SilvaLélia Batista de Souza

Abstract

DNA repair systems play a critical role in protecting the human genome against cumulative damage. The apurinic/apyrimidinic endonuclease 1 is a protein involved in DNA base excision repair and its expression still needs to be investigated in salivary gland tumors. The objective of this study is to analyze the immunoexpression of apurinic/apyrimidinic endonuclease 1 in pleomorphic adenomas and carcinomas ex pleomorphic adenomas of the salivary glands. A total of 33 pleomorphic adenomas and 16 carcinomas ex pleomorphic adenomas of the salivary glands underwent immunohistochemical study by the polymeric biotin-free technique. Immunopositive cells were analyzed quantitatively. For statistical analysis, Mann-Whitney test was performed and a significance level was set at p ≤ 0.05. All analyzed tumors (n = 49) were positive for apurinic/apyrimidinic endonuclease 1. However, there was a higher median expression in carcinomas ex pleomorphic adenomas (p < 0.001). There was no difference between this protein immunoexpression and tumors of major or minor salivary gland. Overexpression was found mainly in cases of carcinomas ex pleomorphic adenomas with lymph node metastasis (p = 0.002) and invasive growth (p = 0.003), when compared to case...Continue Reading

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Citations

Mar 30, 2018·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·Leorik Pereira SilvaMárcia Cristina da Costa Miguel
Nov 18, 2020·Archives of Oral Biology·Fernanda Aragão FelixCarlos Augusto Galvão Barboza

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