• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
https://doi.org/10.11606/D.58.2023.tde-25102023-162822
Document
Author
Full name
Karina Helen Martins
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2023
Supervisor
Committee
Daldegan, Andiara De Rossi (President)
Bufalino, Andreia
Ferraz, Emanuela Prado
León, Jorge Esquiche
Title in Portuguese
Miofibroblastos estromais em correlação com inflamação e dente impactado em cistos odontogênicos: um estudo imunohistoquímico comparativo
Keywords in Portuguese
Cistos odontogênicos
Dente impactado
Imunohistoquímica
Inflamação
Miofibroblastos
Abstract in Portuguese
Miofibroblastos estromais podem atuar favorecendo o crescimento e progressão de lesões odontogênicas, mais comumente do ceratocisto odontogênico (CO). Embora pouco explorado, foi demonstrado que o CO associado a um dente impactado tem uma tendência de crescimento rápido. Não se sabe se esse achado está associado à expressão diferencial de imunomarcadores de miofibroblastos. Treze casos de cada, folículo pericoronário (FP), cisto dentígero inflamado (CDI), cisto dentígero não inflamado (CDN), ceratocisto odontogênico associado a (CO-A) ou não associado (OCN) a dente impactado, foram avaliados através dos imunomarcadores: vimentina, α-SMA, calponina e h-caldesmon. Os dados obtidos foram analisados pelos testes Shapiro-Wilk, Kruskal-Wallis e Dwass-Steel-Critchlow-Fligner Multiple Comparisons, sendo p<0,05 considerado estatisticamente significativo. Todos os casos foram positivos para vimentina, com poucos casos exibindo expressão leve. Todos os FPs foram negativos para α-SMA. COs mostraram expressão significativamente maior de α-SMA do que CDs (p<0,05). Com expressão semelhante entre os grupos CD, a expressão de α-SMA foi maior em CO-A do que em CO-N (p=0,882). Além disso, a idade média de CO-A foi significativamente menor do que pacientes com CO-N. Apenas 4 casos (1 CDI, 3 CO-N) mostraram leve expressão de calponina. Todos os casos foram negativos para h-caldesmon. Nossos resultados sugerem falta de diferenciação miofibroblástica em FPs. A inflamação não parece influenciar a população de miofibroblastos nos CDs. Embora não significativa, uma maior expressão de α-SMA pode explicar as características clínicopatológicas dos pacientes CO-A. A calponina parece não ser um marcador confiável para miofibroblastos nesses casos.
Title in English
Stromal myofibroblasts in correlation with inflammation and impacted tooth in odontogenic cysts: an immunohistochemical comparative study
Keywords in English
Immunohistochemistry
Impacted tooth
Inflammation
Myofibroblasts
Odontogenic cysts
Abstract in English
Stromal myofibroblasts may act favoring growth and progression of odontogenic lesions, notably odontogenic keratocyst (OKC). While little explored the associated inflammation, it has been shown that OKC associated with an impacted tooth has a tendency toward rapid growth. Whether this finding is associated with the differential expression of myofibroblast immunomarkers, is unknown. Thirteen cases of each, pericoronal follicle (PF), inflamed dentigerous cyst (iDC), noninflamed DC (nDC), OKC associated with (OKC-A) or not associated (OKC-N) with impacted tooth, were evaluated through vimentin, α-SMA, calponin and h-caldesmon immunomarkers. The data obtained were analyzed using the Shapiro-Wilk, Kruskal-Wallis and Dwass-SteelCritchlow-Fligner Multiple Comparisons tests, with p<0.05 being considered statistically significant. All cases were vimentin positive, with few cases exhibiting mild expression. All PFs were α-SMA negative. OKCs showed significant higher expression of α-SMA than DCs (p<0.05). With similar expression between DC groups, the α-SMA expression was higher in OKC-A than OKC-N (p=0.882). Also, the mean age of OKC-A was significantly lower than OKC-N patients. Only 4 cases (1 iDC, 3 OKC-N) showed mild expression of calponin. All cases were h-caldesmon negative. Our results suggest lack of myofibroblastic differentiation in PFs. Inflammation does not seem to influence the myofibroblast population in DCs. Although not significant, a higher expression of α-SMA can explain the clinicopathological features of OKC-A patients. Calponin seems not to be a reliable marker for myofibroblasts in these cases.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2023-11-24
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.