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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Detecção e análise do Papilomavírus humano (HPV) em carcinomas mamários de mulheres do Nordeste do Brasil

LIMA, Elyda Gonçalves de 11 March 2016 (has links)
Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2017-07-12T15:20:04Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Tese_Elyda Gonçalves_PPGG_2016.pdf: 2873444 bytes, checksum: a341f8fc45a442c022975db79d659268 (MD5) / Made available in DSpace on 2017-07-12T15:20:04Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Tese_Elyda Gonçalves_PPGG_2016.pdf: 2873444 bytes, checksum: a341f8fc45a442c022975db79d659268 (MD5) Previous issue date: 2016-03-11 / CAPES / O câncer da mama é o tipo de câncer que mais acomete mulheres em todo o mundo. Diversos fatores estãoassociados ao desenvolvimento desta neoplasia, dentre elas as infecções virais. Entre os três vírus mais estudados como causa de carcinogênese mamária está oPapillomavirus humano (HPV). Assim, oobjetivo foi detectar e analisar o HPV emcarcinomasmamáriosde mulheres do Nordeste do Brasil. A detecção do DNA viral foi realizada PCR, as amostras positivasforam tipificadas por sequenciamento. A quantificação da carga viral e a determinação do status físico por qPCR, e a detecção as oncoproteínas de E6 e E7 de HPV por imunohistoquímica. O DNA de HPV foi detectado em 46,7% dos carcinomas de mama HPV-positivos. O HPV16foi omais prevalente, 92% dos casos. A carga viral do HPV apresentou uma média de 14,2 cópias em 104 células, noscarcinomas de mama. Além disso, em 57,2% dos carcinomas mamáriosHPV-positivas apresentaram o DNA viral integrado ao genoma do hospedeiro. Altas taxas de detecção das oncoproteínas E6(89,5%) e E7(90%) foram identificadas nos carcinomas de mama HPV-positivos. Já as proteínas supressoras de tumor, p53 e p16INK4A, apresentaram taxas menores 95,7% e 92,3% respectivamente. Os resultados deste estudo sugerem que o vírus esteja em atividade nas células tumorais e provavelmente desempenhem papel na carcinogênese mamária. / Breast cancer is the type of cancer that affects more women around the world. Several factors are associated with the development of cancer, among which viral infections. Of the three most-studied virus as a cause of mammary carcinogenesis is the Human papillomavirus (HPV). The objective was to detect and analyze HPV in breast carcinomas of women in northeastern Brazil. The detection of viral DNA was performed PCR positive samples were typed by sequencing. The quantification of viral load and to determine the physical status by qPCR, and detection of the oncoproteins E6 and HPV E7 by immunohistochemistry. HPV DNA was detected in 46.7% of HPV-positive breast carcinomas. HPV16 was the most prevalent, 92% of cases. The HPV viral load averaged 14.2 copies in 104 cells in breast carcinomas. Furthermore, 57.2% of HPV-positive breast carcinomas showed the integrated viral DNA into the host genome. High rates of detection of E6 (89.5%) and E7 (90%) were identified in HPV-positive breast tumors. Already the tumor suppressor protein p53 and p16INK4a, had lower rates 95.7% and 92.3% respectively. The results of this study suggests that the virus is active in tumor cells and probably play role in breast carcinogenesis.

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