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Previous issue date: 2014-02-13 / The radicular cysts (RCs) and dentigerous (DCs), despite having different etiologies, form a pathological cavity lined by epithelium, which grows due to the buildup of fluid inside, as the surrounding bone is reabsorbed and the epithelium will being induced to proliferate. The epithelial proliferation, which has been identified as one of the key processes in the growth of odontogenic cystic lesions, is influenced by growth factors such as EGFR (epidermal growth receptor factor) and podoplanin (PDPN), many of which may have its production stimulated mainly during inflammatory processes. The objective of this research was to evaluate and compare the immunohistochemical expression of EGFR and PDPN in 30 cases of RCs and 30 cases of DCs, semiquantitatively, in light microscopy, associating it with the degree of inflammation, cellular localization of immunostaining and with the immunostained epithelial layers. Data were statistically analyzed by Chi-square test and Fisher exact test, considering a significance level of 5 %. The results showed high immunoreactivity of both proteins in the lesions studied, only statistically significant difference was observed in immunostaining of PDPN (p=0.033), which proved higher in RCs. The other analyzed parameters showed no relevant significant differences. We conclude that, as EGFR and PDPN showed high immunoreactivity in cystic lesions analyzed, these proteins participate the pathogenesis of these lesions through the epithelial stimulation process, despite having different etiologies. Furthermore, it can infer that the higher immunostaining of PDNP in RCs that DCs showed no distinction indicator between the two lesions, regarding their etiologies, once this protein also showed a considerable expression in DCs, independent of the intensity of the inflammatory infiltrate / Os cistos radiculares (CRs) e dent?geros (CDs), apesar de possu?rem etiologias diferentes, formam uma cavidade patol?gica revestida por epit?lio, a qual cresce em fun??o do ac?mulo de l?quido em seu interior, ? medida que o osso ao redor ? reabsorvido e o epit?lio vai sendo induzido a proliferar. A prolifera??o epitelial, que tem sido apontada como um dos processos determinantes no crescimento das les?es c?sticas odontog?nicas, ? influenciada por fatores de crescimento como o EGFR (receptor do fator de crescimento epid?rmico) e a podoplanina (PDPN), muitos dos quais podem ter sua produ??o estimulada principalmente durante processos inflamat?rios. O objetivo desta pesquisa foi avaliar e comparar a express?o imunoistoqu?mica do EGFR e da PDPN em 30 casos de CRs e 30 casos de CDs, de forma semiquantitativa, em microscopia de luz, associando-a com o grau de inflama??o, localiza??o celular da imunocolora??o e com as camadas epiteliais imunomarcadas. Os dados foram avaliados estatisticamente por meio de testes do Qui-quadrado e Exato de Fisher, considerando-se um n?vel de signific?ncia de 5%. Os resultados mostraram que houve elevada imunorreatividade das duas prote?nas nas les?es estudadas, sendo observada apenas diferen?a estat?stica significativa na imunoexpress?o da PDPN (p=0,033), que se mostrou mais elevada nos CRs. Os demais par?metros analisados n?o demonstraram diferen?as significativas relevantes. Conclui-se que, como o EGFR e a PDPN apresentaram elevada imunoexpress?o nas les?es c?sticas analisadas, essas prote?nas participam da patog?nese dessas les?es atrav?s da estimula??o epitelial, apesar de apresentarem etiologias diferentes. Al?m disso, pode-se inferir que a maior imunomarca??o da PDPN em CRs do que em CDs n?o se mostrou indicador de distin??o entre as duas les?es, com rela??o ?s suas etiologias, uma vez que nestes ?ltimos essa prote?na tamb?m apresentou express?o consider?vel, independente da intensidade do infiltrado inflamat?rio
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17132 |
| Date | 13 February 2014 |
| Creators | Maia, Viviane Alves de Oliveira |
| Contributors | CPF:02569549410, http://lattes.cnpq.br/4649601602612601, Silveira, Ericka Janine Dantas da, CPF:02869049420, http://lattes.cnpq.br/2186658404241838, N?brega, Fernando Jos? de Oliveira, CPF:02692435427, http://lattes.cnpq.br/8597370276326959, Gurgel, Bruno C?sar de Vasconcelos |
| 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/masterThesis |
| 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 |
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