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Master's Dissertation
DOI
https://doi.org/10.11606/D.17.2016.tde-14072015-171556
Document
Author
Full name
Franklin Fernandes Pimentel
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2010
Supervisor
Committee
Tiezzi, Daniel Guimarães (President)
Marana, Heitor Ricardo Cosiski
Santos, Cesar Cabello dos
Title in Portuguese
Superexpressão simultânea das proteínas HER2 e WIPF2 no câncer de mama
Keywords in Portuguese
Câncer de mama
HER2
Transição epitélio mesênquima
WIPF2
Abstract in Portuguese
Introdução: o câncer de mama que apresenta amplificação/superexpressão do HER2 apresenta-se com pior prognóstico e seu amplicon se localiza no locus 17q12-q21. O gene WIPF2, relacionado a motilidade celular, localiza-se no mesmo locus e também se encontra presente no amplicon do HER2. Objetivo: avaliar a superexpressão simultânea do HER2 e WIPF2 através de marcação imunohistoquímica. Métodos: foram selecionados 94 casos de carcinoma ductal invasor de mama, sendo possível a obtenção de material em 87. Foi realizada técnica de microarranjo tecidual e as lâminas foram analisadas. Informações clínicas foram obtidas de prontuário médico. Resultados: após microscopia óptica das lâminas de TMA obtidas e comparação com lâminas convencionais arquivadas, validou-se o método, com bom índice de correlação kappa (0,83 para receptores de estrógeno e 0,84 para receptores de progesterona). Houve associação entre a superexpressão do WIPF2 com casos Ki-67 positivos e em pacientes nuligestas. O grupo HER2 apresentou maior porcentagem de casos WIPF2 positivos em relação ao grupo triplo-negativo à microscopia óptica (66,7% vs. 22,7%, respectivamente; p=0,03). Na análise digital, o perfil molecular HER2 apresentou maior expressão do WIPF2 em relação ao perfil luminal A e ao triplo negativo (23,9 ± 9,0% vs. 14,6 ± 9,0% e 14,2 ± 9,0%, respectivamente; p=0,01). Conclusão: O WIPF2 é mais expresso por tumores com o perfil HER2, assim como se associa a tumores com maior proliferação e tumores em pacientes nulíparas.
Title in English
Simultaneous overexpression of HER2 and WIPF2 proteins in breast cancer
Keywords in English
Breast cancer
EMT
HER2
WIPF2
Abstract in English
Introduction: the breast cancer with amplification/overexpression of HER2 shows worse prognosis and its amplicon is located in the 17q12-21 locus. The gene WIPF2, related to cellular mobility, is located in the same locus and is also present in the HER2 amplicon. Objective: to evaluate HER2 and WIPF2 simultaneous overexpression using immunohistochemistry technique. Methods: we selected 94 invasive ductal carcinoma samples and it was possible to evaluate 87. Tissue microarray has been done and slides analyzed. Clinical informations were obtained from clinical files. Results: after optical microscopy of TMA slides and comparison with conventional slides, the method was validated with a high correlation kappa index (0.83 for estrogen receptors and 0.84 for progesterone receprtors). The WIPF2 overexpression was associated with positive Ki-67 tumors and nuliparous women. The HER2 group presented greater percentage of WIPF2 positive cases when compared with triple-negative group using optical microscopy (66.7% vs. 22.7%, respectively, p=0.03). With the digital analysis, the HER2 group presented greater expression of WIPF2 when compared with luminal A and triple-negative groups (23.9 ± 9.0% vs. 14.6 ± 9.0% e 14.2 ± 9.0%, respectively; p=0.01). Conclusion: WIPF2 is more expressed in the HER2 group tumors. It is also related to high proliferation index and nuliparous women´s tumors.
 
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FranklinOrig.pdf (7.59 Mbytes)
Publishing Date
2016-01-13
 
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