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000796740.pdf: 844755 bytes, checksum: 57dac5aa0fed7a3e3886e9c2d4b0f257 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / A leucoplasia bucal é considerada uma lesão cancerizável para o desenvolvimento do carcinoma espinocelular (CEC), e vários fatores de risco podem estar relacionados a essa carcinogênese, incluindo o papiloma vírus humano (HPV). Na mucosa bucal tem sido feita a associação da leucoplasia bucal com o HPV. O objetivo desse estudo foi detectar a presença do DNA do HPV em amostras de tecidos fresco, saliva, plasma e células exfoliadas orais, extraídas de pacientes com e sem leucoplasia bucal, analisadas através da técnica de nested PCR (nPCR). Para este estudo foram avaliados 32 pacientes portadores de leucoplasia bucal e 24 pacientes selecionados de forma caso-controle. Foi realizada a extração de DNA das amostras, e em seguida a sua amplificação através da PCR. A nPCR para detecção do HPV revelou a presença do vírus em 68,75% das amostras de tecido fresco, 50% no plasma, 28,1% no citobrush, 62,5% na saliva no grupo de pacientes com leucoplasia em comparação com 45,8%, 54,2%, 45,8%, 50% nas amostras de tecido fresco, plasma, citobrush e saliva do grupo controle respectivamente. Baseado no presente estudo o HPV poderia ser um co-fator etiológico na patogênese da leucoplasia oral. / The oral leukoplakia is considered as a pre-malignant lesion for the development of the oral squamous cell carcinoma, and several risk factors can be related to this carcinogenesis, including the human papillomavirus (HPV). HPV is the main cause of cervix cancer, and your role in the oral carcinogenesis is still controversial. The aims of this study was to detect the presence of HPV DNA in fresh tissue samples, plasma and oral exfoliated cells extracted from patients 32 with oral leukoplakia, and 24 controls analyzed through the technique of nPCR and make a comparison among these biological materials sources. It was performed the extraction of DNA from 37 patients with oral leukoplakia, and amplification of the human ?-globin gene was carried out in all samples to confirm the presence and integrity of DNA. Nested PCR assays revealed the presence of HPV DNA in 68.75% of fresh tissue, 50.0% of plasma, 62.5% of saliva, and in 28.1% of oral exfoliated cells extracted from patients. Based on the current experiment, HPV could potentially be an etiologic co-factor in the pathogenesis of oral leukoplakia. / FAPESP: 11/17791-5 / FAPESP: 11/05499-8
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.unesp.br:11449/115851 |
| Date | 16 August 2013 |
| Creators | Ferreira, Lígia Lavezo [UNESP] |
| Contributors | Universidade Estadual Paulista (UNESP), Miyahara, Glauco Issamu [UNESP], Nunes, Cáris Maroni [UNESP] |
| Publisher | Universidade Estadual Paulista (UNESP) |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | 77 f : il. + 1 CD-ROM |
| Source | Aleph, reponame:Repositório Institucional da UNESP, instname:Universidade Estadual Paulista, instacron:UNESP |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -1, -1, -1 |
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