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Doctoral Thesis
DOI
https://doi.org/10.11606/T.58.2022.tde-06122022-155844
Document
Author
Full name
Amanda Silva Bertasso
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2022
Supervisor
Committee
Nelson Filho, Paulo (President)
Cerri, Paulo Sérgio
Queiroz, Alexandra Mussolino de
Simões, Francisco Xavier Paranhos Coêlho
Title in Portuguese
Quantificação de células da resposta imune e inflamatória e de peptídeo antimicrobiano (beta-defensina-3), em cistos radiculares de dentes decíduos e permanentes
Keywords in Portuguese
Beta-defensinas
Cistos radiculares
Dentes decíduos
Dentes permanentes
Imunohistoquimica
Inflamação
Resposta imune
Abstract in Portuguese
O objetivo do presente estudo foi quantificar células da resposta imune e inflamatória (mastócitos, células dendríticas plasmocitóides maduras e imaturas, linfócitos T regulatórios - TREGS - maduros e imaturos, linfócitos T, linfócitos T citotóxicos e Linfócitos B), em cistos radiculares de dentes decíduos e permanentes. Além disso, foi avaliada a presença/ausência, a intensidade e a porcentagem de marcação para beta-defensina-3 (hBD-3). Foram selecionados 19 casos de cistos radiculares de dentes decíduos e 17 cistos radiculares de dentes permanentes, os quais foram submetidos à análise imunohistoquímica por meio de marcadores específicos. Os resultados obtidos foram submetidos aos testes de D'Agostino & Pearson, Mann Whitney, teste t, Kruskal-Wallis e pós-teste de Dunn, com nível de significância de 5%. Verificou-se que todos os tipos celulares avaliados estavam presentes em todas os cistos radiculares. Os dentes decíduos apresentaram maior expressão de células dendríticas plasmocitóides (maduras e imaturas), Linfócitos B e Linfócitos T (p<0,05), enquanto os dentes permanentes apresentaram maior expressão de linfócitos T, Dendríticas Plasmocitóides imaturas, linfócitos T citotóxicos e linfócitos B (p<0,05). A hBD-3 foi expressa em 78,5% dos dentes decíduos e em 76,9% dos dentes permanentes, no epitélio e na cápsula, porém nos dentes decíduos essa expressão ocorreu de maneira semelhante na cápsula e no epitélio (p>0,05), enquanto que nos dentes permanentes houve maior expressão na cápsula (p<0,05). Nos dentes decíduos observou-se maior produção de hBD-3 nas lesões pequenas, em comparação às lesões grandes (p<0,05). Por outro lado, nos dentes permanentes não foi observada diferença na produção de hBD-3 entre lesões pequenas e lesões grandes (p>0,05). Concluiu-se que todas as células avaliadas estavam presentes em todos os casos (100%). As células com maior expressão nos dentes decíduos foram as células dendríticas plasmocitóides imaturas, enquanto que nos dentes permanentes foram os Linfócitos T. A hBD-3 foi produzida pelo epitélio/cápsula, tanto em dentes decíduos quanto em dentes permanentes. Nos dentes decíduos observou-se maior produção de hBD-3 nas lesões pequenas, em comparação às lesões grandes. Por outro lado, nos dentes permanentes não foi observada diferença na produção de hBD-3 entre lesões pequenas e lesões grandes.
Title in English
Quantification of immune and inflammatory cell responses and antimicrobial peptide (beta-defensin-3) in radicular cysts of primary and permanent teeth
Keywords in English
Beta-defensins
Immune response
Immunohistochemistry
Inflammation
Permanent teeth
Primary teeth
Radicular cysts
Abstract in English
The aim of the present study was to quantify immune and inflammatory response cells (mast cells, mature and immature plasmacytoid dendritic cells, regulatory T lymphocytes - TREGS - mature and immature, T lymphocytes, cytotoxic T lymphocytes and B lymphocytes), in radicular cysts of primary and permanent teeth. In addition, presence/absence, intensity and percentage of immunostaining for betadefensin-3 (hBD-3) were evaluated. Nineteen cases of periapical cysts of deciduous teeth and 17 periapical cysts of permanent teeth were selected, which were submitted to immunohistochemical analysis using specific markers. The results obtained were submitted to D'Agostino & Pearson, Mann Whitney, t-test, KruskalWallis and Dunn's post-test, with a significance level of 5%. All cell types evaluated were present in all radicular cysts. Primary teeth showed higher expression of plasmacytoid dendritic cells (mature and immature) (p<0.05), T lymphocytes (p<0.05) and B lymphocytes (p<0.05), while permanent teeth showed higher expression of plasmacytoid dendritic cells immature (p<0.05), T lymphocytes(p<0.05), B lymphocytes (p>0.05) and cytotoxic T lymphocytes (p>0.05). Beta-defensin-3 was expressed in 78.5% of deciduous teeth and in 76.9% of permanent teeth, in the epithelium and capsule. In primary teeth, this expression occurred in a similar way in the capsule and in the epithelium (p>0.05), while in permanent teeth there was greater expression in the capsule (p<0.05). In primary teeth, a higher production of hBD-3 was observed in small lesions, compared to large lesions (p<0.05). On the other hand, in permanent teeth, no difference was observed in the production of hBD-3 between small and large lesions (p>0.05). It was concluded that all evaluated cells were present in all cases (100%). The cells with the highest expression in primary teeth were the plasmacytoid dendritic cells, while in the permanent teeth the T lymphocytes were the cells with the highest expression. Beta-defensin-3 was produced by the epithelium/capsule in both primary and permanent teeth. In primary teeth, a higher production of hBD-3 was observed in small lesions, compared to large lesions. On the other hand, in permanent teeth, no difference was observed in the production of hBD-3 between small and large lesions.
 
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Publishing Date
2022-12-07
 
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