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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Avaliação do papel biológico do gene homeobox HOXA10 em carcinomas espinocelulares orais / Biological role of HOXA10 homeobox gene in oral squamous cell carcinoma

Pereira, Manoela Carrera Martinez Cavalcante, 1982- 21 August 2018 (has links)
Orientadores: Ricardo Della Coletta, Tuula Anneli Salo / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-21T22:14:14Z (GMT). No. of bitstreams: 1 Pereira_ManoelaCarreraMartinezCavalcante_D.pdf: 2016848 bytes, checksum: 00c1511261259785b77ebe40882c174f (MD5) Previous issue date: 2012 / Resumo: Embora os genes HOX sejam conhecidos por atuarem na regulação de eventos importantes para o desenvolvimento embrionário, incluindo proliferação, diferenciação e migração celular, alterações no padrão de expressão têm sido frequentemente associadas ao desenvolvimento de neoplasias malignas. Estudos em nosso laboratório caracterizaram o perfil de expressão dos 39 membros da família HOX de genes homeobox em amostras orais de mucosa normal e carcinoma espinocelular (CEC), identificando genes diferencialmente expressos. Dentre estes genes destacou-se HOXA10, que tem a sua expressão associada a fenótipos importantes para o desenvolvimento tumoral e ao prognóstico. O objetivo deste estudo foi confirmar os níveis elevados de expressão de HOXA10 em CECs orais em comparação a mucosa oral normal e analisar o efeito da superexpressão e neutralização do gene HOXA10 na modulação dos principais eventos biológicos associados ao fenótipo tumoral. Os níveis de HOXA10 foram avaliados por imuno-histoquímica e qRT-PCR e os efeitos de HOXA10 sobre a proliferação, apoptose, adesão, transição epitélio-mesenquima (TEM), migração e invasão celular foram avaliados em clones celulares de queratinócitos normais HaCaT superexpressando HOXA10 e em clones da linhagem de carcinoma de língua HSC-3 expressando uma sequência de shRNA (short harpin RNA) para neutralizar a expressão de HOXA10. A expressão de HOXA10 foi significantemente maior nas amostras de CEC oral quando comparado com as amostras de tecido normal. A superexpressão de HOXA10 nas células HaCaT significantemente aumentou os níveis de expressão de N-caderina e ?-catenina, sem alteração no perfil protéico. Enquanto a adesão das células HaCaT com superexpressão de HOXA10 foi reduzida na superfície sem tratamento (plástico), na superfície tratada com colágeno tipo I foi significantemente aumentada, condizendo com o maior potencial migratório adquirido por estas células. A neutralização de HOXA10 significantemente reduziu a capacidade proliferativa das células HSC-3. Em adição, o silenciamento de HOXA10 induziu significantemente a expressão de marcadores da TEM, a adesão celular e os potenciais de migração e invasão das células HSC-3. Tanto a superexpressão quanto a neutralização de HOXA10 não modularam as taxas de apoptose. Em conclusão, os resultados deste estudo sugerem que a expressão de HOXA10 modula eventos importantes para o desenvolvimento e progressão dos CECs orais / Abstract: Although HOX genes are known for acting in the regulation of important events during embryogenesis, such as cellular proliferation, differentiation and migration, alterations in their expression patterns have been frequently associated to the development of cancers. Studies in our laboratory characterized the expression profile of the 39 members of the HOX family of homeobox genes in oral samples of normal mucosa and squamous cell carcinoma (SCC), identifying differently expressed genes. Among those genes are HOXA10, which has its expression related to tumor development and prognosis. The aim of the study was to valitade the elevated levels of HOXA10 on oral SCCs comparing to the normal oral mucosa, and to analyze the effects of the overexpression and neutralization of HOXA10 in modulating the main biological events associated to tumorigenesis. The levels of HOXA10 were evaluated by immunohistochemistry and qRT-PCR, and the HOXA10 effects on proliferation, apoptosis, adhesion, epitelial-mesenchimal transition (EMT), migration and invasion were evaluated on HaCaT normal keratinocytes cells overexpressing HOXA10 and on HSC-3 tongue carcinoma cells expressing a shRNA sequence to neutralize HOXA10 expression. The expression of HOXA10 was significantly higher on oral SCC samples when compared to the normal tissue controls. HaCaT cells overexpressing HOXA10 showed higher expression of N-cadherin and ?-catenin mRNA levels, and adhesion and migration were coordinately regulated on those cells. The neutralization of HOXA10 reduced significantly the proliferation capacity of HSC-3 cells, while induced significantly the expression of EMT markers, cell adhesion as well as the migration and invasion of HSC-3 cells. Overexpression and neutralization of HOXA10 did not modulate apoptosis rates. In conclusion, the results of this study suggest that the HOXA10 expression modulates important events associated with development and progression of oral SCCs / Doutorado / Patologia / Doutor em Estomatopatologia
12

A comparison of the presence and behaviour of round cells in acanthosis, dyskeratosis, carcinoma in situ and squamous cell of the oral cavity

Browne, Graeme Anthony January 1976 (has links)
No description available.
13

Impairment of intra-oral sensation, discrimination ability, and swallowing function following radiotherapy and surgery for oral and pharyngeal cancer /

Bodin, Ingrid, January 2004 (has links)
Diss. Umeå : Univ., 2004.
14

Der Mundhöhlenkrebs und seine Vorstadien ultrastrukturelle und immunpathologische Aspekte = Oral cancer and precancer : ultrastructural and immunopathologic aspects /

Burkhardt, Arne. January 1980 (has links)
Habilitationsschrift--Hamburg. / In German with summary in English and German. Includes bibliographical references (p. 235-264) and index.
15

Das Haemangioma-Cavernosum der Mundhöhle

Kemper, Bernhard. January 1934 (has links)
Thesis (doctoral)--Westphalia, 1934.
16

Der Mundhöhlenkrebs und seine Vorstadien ultrastrukturelle und immunpathologische Aspekte = Oral cancer and precancer : ultrastructural and immunopathologic aspects /

Burkhardt, Arne. January 1980 (has links)
Habilitationsschrift--Hamburg. / In German with summary in English and German. Includes bibliographical references (p. 235-264) and index.
17

Das Haemangioma-Cavernosum der Mundhöhle

Kemper, Bernhard. January 1934 (has links)
Thesis (doctoral)--Westphalia, 1934.
18

Perceived efficacy and utilization of the OralCDx brush biopsy

Huffman, Courtney N., January 2002 (has links)
Thesis (M.S.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains vi, 52 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 37-38).
19

Snuff-induced lesions a clinical and experimental study /

Hirsch, Jan-Michaél. January 1983 (has links)
Thesis (doctoral)--University of Göteborg, 1983. / Extra t.p. with thesis statement inserted. Includes the author's five published papers. Includes bibliographical references.
20

Human papillomavirus and oral cancer

Liu, Xuan. January 1998 (has links)
Thesis (Ph. D.)--University of California, Los Angeles, 1998. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

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