Made available in DSpace on 2014-12-17T15:32:28Z (GMT). No. of bitstreams: 1
MartaRP.pdf: 1904281 bytes, checksum: 2912c6b8ea9a773c553d0776245f93a5 (MD5)
Previous issue date: 2009-02-27 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The Oral Epithelial Dysplasia (OED) is the lesion that precedes or co-exists with the Oral Squamous Cell Carcinoma (OSCC), presenting molecular and/or histological similar alterations. The divergences about the malignization potential of OEDs and the role of inflammation in this process make hard the early diagnosis and evaluation of OSCCs aggressiveness. Thus, it became the goal of this study to evaluate the role of inflammation in oral carcinogenesis and tumoral aggressiveness. For this purpose a morphological study was performed in 20 OED cases and 40 OSCC cases to detect the malignization potential of OEDs and the histologic malignancy grading (HMG) of OSCCs, analyzing superficial masses for dismorphism evaluation and the invasive front for evaluation of tumoral growing; and immunohistochemical, using anti-CD8, anti-FOXP3, anti-TGF?, anti-TNF? and anti-NF-?B antibodies, comparing their with the types lesion, histological degree and intensity of the inflammatory infiltrate. The results were statistically significant for the parameters: cell maturity (p=0,0001), masses presence (p=0,038) and dismorphism (p=0,037), when associated to HMG. To compare the expression of the markers with the types lesion, a significantly higher expression of CD8 (p=0,001) and NF-?B (p=0,002) in the OED, and also a smaller expression of the epithelial TGF? in the severe OEDs (p=0,011), without significant expression between OSCC degrees. By relating the expression of the studied markers with the inflammatory infiltrate intensity, a positive relation was observed with: inflammatory TNF?(p=0,003), epithelial TNF? and NF-?B (p=0,051 and p=0,004), in OEDs; and with CD8 (p=0,021) and TNF? (p=0,015) in conjunctive OSCCs; and a negative relation with epithelial TNF? (p=0,034) in OSCCs. No significant relation was found between FOXP3 with any of the studied variables. These findings lead to the conclusion that, the study of the invasive front is as important as the study of superficial masses for the evaluation of tumoral aggressiveness; the intensity of the inflammatory infiltrate has no use as a parameter for prognostic evaluation of OSCC in routine exams, but, the molecular events detected in this study may be necessary to give basis for determining the malignant potential in OEDs and aggressiveness in OSCCs / A Displasia Epitelial Oral (DEO) ? a les?o que precede ou co-existe com o Carcinoma Epiderm?ide Oral (CEO), apresentando altera??es moleculares e/ou histol?gicas
semelhantes. As diverg?ncias sobre o potencial de maligniza??o das DEO e o papel da inflama??o nestes processos t?m dificultado o diagn?stico precoce e a avalia??o da agressividade dos CEO. Sendo assim, tornou-se objetivo deste estudo avaliar o papel da
inflama??o na carcinog?nese oral e agressividade tumoral. Para isso foi realizado estudo morfol?gico em 20 casos de DEO e 40 casos de CEO para detectar o potencial de maligniza??o das DEO e o Grau Histol?gico de Malignidade (GHM) dos CEO, analisando as massas superficiais para avalia??o do dismorfismo e o front invasivo para avalia??o do crescimento tumoral; e imuno-histoqu?mico, utilizando os anticorpos anti-CD8, anti-FOXP3, anti-TGF?, anti-TNF-? e anti-NF-?B, para comparar a express?o dos mesmos com o tipo de les?o, grau histol?gico e intensidade do infiltrado
inflamat?rio. Os resultados foram estatisticamente significantes para os par?metros, maturidade celular (p=0,0001), presen?a de massas (p=0,038) e dismorfismo (p=0,037), quando associados aos GHM. Ao comparar a express?o dos marcadores com o tipo de les?o, encontrou-se uma express?o significativamente maior do CD8 (p=0,001) e do NF-?B (p=0,002) nas DEO, assim como uma menor express?o do TGF? epitelial nas
DEO severas (p=0,011), n?o tendo express?o significativa entre os graus dos CEO. Ao relacionar a express?o dos marcadores estudados com a intensidade do infiltrado
inflamat?rio, observou-se uma rela??o positiva com o TNF? inflamat?rio (p=0,003), o TNF? e o NF-?B epiteliais (p=0,051 e p=0,004), nas DEO; com o CD8 (p=0,021) e o
TNF? (p=0,015) no conjuntivo dos CEO; e uma rela??o negativa com o TNF? (p=0,034) epitelial dos CEO. N?o foi encontrada rela??o significativa da FOXP3 com nenhuma das vari?veis estudadas. Esses achados levaram a concluir que, o estudo do front invasivo ? t?o importante quanto o estudo das massas superficiais para avalia??o da agressividade tumoral; a intensidade do infiltrado inflamat?rio n?o pode ser utilizado
como par?metro para avalia??o progn?stica do CEO no exame de rotina; mas os eventos moleculares detectados neste estudo podem ser necess?rios para embasar a determina??o do potencial de malignidade nas DEO e da agressividade nos CEO
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17142 |
| Date | 27 February 2009 |
| Creators | Piva, Marta Rabello |
| Contributors | http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787927Z7&dataRevisao=null, Souza, Gleicy F?tima Medeiros de, CPF:62528890400, http://lattes.cnpq.br/8188425303512198, Soares, Rosilene Calazans, CPF:87677040420, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4701209J8, Pinto, Le?o Pereira, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787928A2, Queiroz, L?lia Maria Guedes, CPF:59539224420, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793681A0&dataRevisao=null, Souza, L?lia Batista de |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Patologia Oral, UFRN, BR, Odontologia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0031 seconds