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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

Modelo experimental de quimioembolizaÃÃo hepÃtica / Experimental model of chemoembolization hepatic

Jamil Martins Zarur 09 September 2004 (has links)
CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior / OBJETIVO: Estabelecer um modelo de tumor no fÃgado de ratos para estudo do comportamento tumoral e avaliar o uso da quimiembolizaÃÃo transarterial. MÃTODOS: Utilizou-se oitenta e oito ratos Wistar, fÃmeas, adultos, pesando entre 175- 284 g . Realizado incisÃo abdominal de 3 cm e implantou-se o carcinossarcoma de Walker 256 no lÃbulo esquerdo do fÃgado. Dividiu-se em trÃs grupos que receberam respectivamente 100x 103 , 200x 103 e 300x 103 cÃlulas tumorais, avaliado a pega do tumor e a sobrevida. Em outro grupo de experimento com 39 animais inoculados com tumor de Walker foi avaliado a sobrevida dos animais apÃs infusÃo do 5-Flourouracil (5-FU) por via intra-peritoneal e intra-arterial. RESULTADOS: O implante do carcinossarcoma de Walker no fÃgado de ratos apresentou desenvolvimento de 100 %, teve um crescimento rÃpido e desenvolvimento de metÃstases tardiamente, levando os animais ao Ãbito entre o sÃtimo e dÃcimo quinto dia. A quimiembolizaÃÃo transarterial à possÃvel de ser realizada experimentalmente. O uso do 5-FU aumentou a sobrevida em comparaÃÃo ao grupo controle. CONCLUSÃO: O modelo de implante do tumor de Walker no fÃgado de ratos à eficiente, de fÃcil reprodutibilidade, e sobrevida mÃdia de 9,96Â0.3 dias. A quimioterapia transarterial hepÃtica pode ser realizada experimentalmente para avaliar diversas drogas. / PURPOSE: An animal model to study the behaviour of liver tumor in rat and its response after use of transarterial chemoembolization. METHODS: We use 88 Wistar rats, all of them were females, adult, weight 175-284 g. Abdominal incison of three cm and implanted the Walker carcinossarcoma 256 at left lobule of the liver. The animals were divided into three grups, that received 100x103 , 200x103, and 300x103 cells. Followed up the animas to avaliate life standing and tumoral development. In another experiment was used 39 animals which already had Walker 256 tumor and we study the survival of the animals after treatment with 5-FU IP or 5-FU IA. RESULTS: The orevall tumor development rate were 100%. Tumor growth was fast, and devolopment metastases on old fase. The animals dead between 7 and 15 day. Its possible to do chemoembolization experimentaly, after the use of 5-FU the rate survival increased. CONCLUSION: The model with Walker 256 tumor developed here is easy to repoduce, efficient, with high tumor development rate observed, the life standing is about 9,96  0,3 days. The chemoembolization experiment allows to assess several drugs.

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