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Doctoral Thesis
DOI
10.11606/T.5.2011.tde-18022011-144806
Document
Author
Full name
Hirofumi Iyeyasu
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Soares, Fernando Augusto (President)
Barros, Alfredo Carlos Simoes Dornellas de
Brentani, Maria Mitzi
Campos, Antônio Hugo José Fróes de Marques
Silva, Ismael Dale Cotrim Guerreiro da
Title in Portuguese
Estudo de moléculas de adesão no câncer de mama bilateral
Keywords in Portuguese
Análise em microsséries
Carcinoma ductal de mama
Imunoistoquímica
Mama bilateral
Moléculas de adesão
Abstract in Portuguese
Carcinoma da mama com apresentação bilateral é uma doença pouco avaliada na literatura, com raros trabalhos científicos que comparam os aspectos moleculares de ambos os tumores. No presente estudo, analisamos os tumores de 45 pacientes portadoras de carcinoma ductal invasivo bilateral em relação às expressões de claudinas-4 e 7, de E-caderina e de -catenina por meio de imunoistoquímica em TMA. Além desses marcadores, analisamos o estado dos receptores de estrógeno e de progesterona, bem como diversas características histopatológicas (grau histológico, nuclear, mitose, infiltrado, desmoplasia e necrose). A amostra foi caracterizado por média de idade de 52,4 anos e os tumores foram divididos em mama primário (MP) e mama secundário (MS). Não houve diferenças entre os dois grupos (MP e MS) nos marcadores testados, sendo que a expressão foi coincidente nas seguintes proporções: claudina-4 (83,8%, p=0,61), claudina-7 (82,2%, p=0,29), E-caderina (81%, p=0,48), -catenina (89,7%, p=0,48), receptor de estrogeno (66%, p=0.75) e receptor de progesterona (55%, p=0.99). Em relação aos aspectos morfológicos, grau histológico (SBR) II, infiltrado inflamatório discreto, necrose, desmoplasia moderada e índice mitótico (<10fm/10cga) foram coincidentes em 57,8%, 60%, 55,6%, 63,6% e 55,6%, respectivamente. Os presentes resultados nos permitem inferir que os tumores de apresentação bilateral são, em sua maioria, similares do ponto de vista morfológico e da expressão dos marcadores testados
Title in English
Analyse of adhesion molecules in bilateral breast câncer
Keywords in English
Adhesion molecules
Bilateral breast
Imunoistoquímica
Invasive ductal carcinoma
Microarray
Abstract in English
Forty-five patients with invasive ductal carcinoma were evaluated for the expression of claudin-4, claudin-7, E-cadherin, and -catenin through tissue microarray (TMA) and immunohistochemistry (IHC) analysis. Besides these markers, estrogen (ER) and progesterone receptor (PR) status was analyzed, in addition to histopathologic characteristics, i.e., histologic grade, nuclear, mitoses, infiltrate, desmoplasia, and necrosis. Tumors were divided into primary breast (PB) and secondary breast (SB). The expression of claudin-4 and -7 was coincident in PB and SB in 83.78% and 82.22% respectively. The expression of -catenin and E-cadherin in PB and SB was coincident in 89.74% and 80.95% respectively. Estrogen receptor status was (+) in both breasts in 66%, while progesterone receptor status (+) was in 55%. The histological grade using the Nottingham-modified Scarff-Bloom-Richardson grading system (MSBR) showed mild infiltrate, necrosis (+), moderate desmoplasia and mitotic index (<10) was coincident in 57.77%, 60.00%, 55.55%, 63.63% and 55.55% respectively. The degree of agreement showed claudin-4 (p=0.61), claudin-7 (p=0.29), E-cadherin (p=0.48), and -catenin (p=0.48). The expression of claudin-4 and -7, E-cadherin and -catenin present a strong agreement between tumors, showing that bilateral tumors are not different. Histopathologic characteristics showed a lesser agreement between tumors
 
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HirofumeIyeyasu.pdf (2.32 Mbytes)
Publishing Date
2011-02-22
 
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