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Previous issue date: 2009-03-06 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Bone morphogenetic proteins (BMPs) are cytokines involved in proliferation and angiogenesis of many kind of human cancer. The present study analyzed the immunohistochemical expression of BMP-2, BMPR-II, BMPR-IA and endoglin (CD105) and their relationship with the biological behavior and local angiogenesis in tongue oral squamous cells carcinoma (SCC). The sample consisted of 25 cases of tongue SCC without metastasis, 25 tongue SCC with metastasis and 25 cases of Inflamatory Fibrous Hyperplasia (IFH).The histological grade of malignancy proposed
by Bryne (1998), adapted by Miranda (2002) was used to classify all tongue SCC cases. Score 0 was attributed to absent-weak immunoexpression and score 1 for strong immunostaning and pattern of distribution was focal or diffuse. Microvessel
counts (MVC) was established for CD105. Most of the patients with tongue SCC was male. The principal age in tongue SCC without metastasis was over 65 years and in
tongue SCC with metastasis was between 45-65 years. There were predominance of stage II in TNM and in the specimens with high-grade, independent of studied group. For BMP-2, 56% of tongue SCC without metastasis and 72% tongue SCC with metastasis exhibited score 1 while the IFH showed secore 0 in 72% of the cases, with statistical association (p=0,007). Considering the BMPR-II, 52% of tongue SCC
without metastasis exhibited score 0; 56% tongue SCC with metastasis and 60% IFH showed score 1. The majority cases of BMPR-IA demonstrated score 1 and 100% of CD105 exhibited strong immunoexpression in tongue SCC. Regarding the pattern distribution, it was noted a tendency to diffuse pattern for the proteins in all groups. The means of MVC were similar in tongue SCC without metastasis (32,91) and in tongue SCC with metastasis (32,05), however existed statistical difference with IFH (p<0,001). There was statistical association of BMP-2 expression with BMPR-II (p=0,008), BMPR-IA (p=0,006) and CD105 (p=0,046). An association between TNM and BMP-2 immunoexpression and their receptors was not detected, nevertheless this association was found with MVC (p=0,047) whose averages were higher for the stages II (35,97) e IV (35,69). No association between histological grading and these proteins was observed. This study suggests that the superexpression of BMP-2 signaling pathways acts on cell proliferation in tongue SCC and can be implicated
with more invasive potential. Additionaly, the CD105 is a potent biological marker of neovascularization in this neoplasm and their association with BMP-2 and BMPR-IA
receptor, showed that this type of cancer in BMP-2 is presented as pro-angiogenic in the metastatic process / As BMPs (prote?nas morfogen?ticas ?sseas) s?o citocinas relacionadas com a prolifera??o e angiog?nese em diversos tipos de c?ncer humano. Com este trabalho foi analisada a express?o imunoistoqu?mica das prote?nas BMP-2, BMPR-IA, BMPR-II e endoglina (CD105), correlacionando-a com o comportamento biol?gico e a angiog?nese local nos carcinomas epiderm?ides de l?ngua (CEL). A amostra foi composta de 25 casos de CEL sem met?stase (CELSM), 25 CEL com met?stase (CELCM) graduados segundo Bryne (1998) e adaptado por Miranda (2002), al?m de 25 casos de hiperplasia fibrosa inflamat?ria (HFI), utilizado como
grupo controle. Foi utilizado escore 0 para marca??o ausente-fraca e 1 para forte; tipo de distribui??o focal ou difuso. Adicionalmente, para o CD105 foi realizada a contagem microvascular (MVC). A maior parte dos pacientes com CEL foi do sexo masculino, no grupo CELSM a faixa et?ria foi maior que 65 anos e o CELCM se encontrou entre 45-65 anos; houve predom?nio do est?gio II do TNM, assim como de
esp?cimes de alto grau, independente do grupo estudado. Para BMP-2, 56% dos CELSM e 72% dos CELCM exibiram escore 1, enquanto a HFI exibiu 72% de escore 0, apresentando associa??o estat?stica (p=0,007). Para BMPR-II 52% dos CELSM exibiram escore 0; 56% CELCM e 60% da HFI escore 1 e no BMPR-IA ocorreu uma predomin?ncia de escore 1 e para o CD105 100% de marca??o forte nos CEL.
Quanto ao tipo de distribui??o notou-se tend?ncia de distribui??o difusa de todas as prote?nas, em todos os grupos. Observaram-se, para MVC, m?dias muito
semelhantes entre os CELSM (32,91) e os CELCM (32,05) exibindo, contudo, diferen?a estat?stica com as HFI (p<0,001).Observa-se uma associa??o estat?stica
da BMP-2 com a BMPR-II (P=0,008), BMPR-IA (p=0,006) e o CD105 (0,046). N?o se observou associa??o entre o TNM e a imunoexpress?o da BMP-2 e seus receptores,
por?m foi encontrada com a MVC (p=0,047), cujas maiores m?dias foram para os est?gios II (35,97) e IV (35,69), tal como n?o ocorreu associa??o entre a grada??o histol?gica e as prote?nas. Conclui-se que a superexpress?o da via de sinaliza??o da BMP-2 atua na prolifera??o celular, contribuindo para maior invasividade do CEL. O CD105 ? um potente marcador de neovasculariza??o deste neoplasma e sua associa??o com a BMP-2 e o receptor BMPR-IA, mostra que neste tipo de neoplasia a BMP-2 se apresenta como pr?-angiog?nico no processo metast?tico
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17141 |
| Date | 06 March 2009 |
| Creators | Ara?jo, Cristina Ruan Ferreira de |
| Contributors | http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787928A2, Freitas, Roseana de Almeida, CPF:28444361453, http://lattes.cnpq.br/9512014003639405, Soares, Andrea Ferreira, CPF:93176961520, Godoy, Gustavo Pina, CPF:85762997472, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4751939A2, Souza, L?lia Batista de, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787927Z7&dataRevisao=null, Pinto, Le?o Pereira |
| 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/doctoralThesis |
| 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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