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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

Nanopartículas poliméricas de PLGA no tratamento de carcinoma hepatocelular e câncer colo-retal / PLGA polymeric nanoparticles in the treatment of hepatocellular carcinoma and colorectal cancer

Baldim, Victor 02 September 2011 (has links)
Orientador: Francisco Benedito Teixeira Pessine / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Química / Made available in DSpace on 2018-08-18T17:10:14Z (GMT). No. of bitstreams: 1 Baldim_Victor_M.pdf: 1808226 bytes, checksum: 7d81445a4d4297b7466e764b52804247 (MD5) Previous issue date: 2011 / Resumo: Neste trabalho preparamos e utilizamos nanopartículas de PLGA-DOTAP encapsulando o peptídeo P17, que bloqueia a ação da citocina imunossupressora TGF-b, no tratamento de camundongos BALB/c fêmea, inoculados via subcutânea com células de hepatocarcinoma (CHC) murino BNL ou de câncer colo-retal (CCR) murino CT26. No modelo de CHC, nanopartículas foram administradas em conjunto com vírus adenoassociados recombinantes, cujo DNA viral codificava a citocina imunoestimuladora IL-12. No modelo de CCR, nanopartículas foram testadas como potencializadoras de uma vacina contra câncer colo-retal. Além disso, a biodistribuição de nanopartículas de PLGA-DOTAP, funcionalizadas ou não com a glicoproteína assialofetuína, foi verificada pelos métodos de bioluminescência em câmara escura com detector CCD e por PCR quantitativa em tempo real. Como resultado, observou-se que nanopartículas de PLGA-DOTAP encapsulando o fármaco P17 são capazes de potencializar a vacina contra CCR e que a glicoproteína assialofetuína é capaz de direcioná-las ao fígado / Abstract: In this research we prepared and used PLGA-DOTAP nanoparticles loaded with the peptide P17, which blocks the action of the imunossupressive cytokine TGF-b, in the treatment of female BALB/c mice inoculated subcutaneously with BNL (murine hepatocellular carcinoma (HCC) cells) or CT26 (murine colorectal cancer (CRC) cells). In the HCC model, nanoparticles were administered together with recombinant adeno-associated virus whose viral DNA encodes the immunostimulatory cytokine IL-12. In the CRC model, nanoparticles were tested as vaccine booster against colorectal cancer. In addition, the biodistribution of PLGA-DOTAP nanoparticles functionalized or not with the asialofetuin glycoprotein was verified by bioluminescence and real-time quantitative PCR. As a result, it was observed that P17 containing DOTAP-PLGA nanoparticles are able to increase vaccine efficiency and that asialofetuin glycoprotein is able to direct them to the liver / Mestrado / Físico-Química / Mestre em Química

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