• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Doctoral Thesis
DOI
https://doi.org/10.11606/T.87.2010.tde-30092010-102942
Document
Author
Full name
Reginaldo Almeida da Trindade
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Costa, Maria Helena Bueno da (President)
Alonso, Silvia Del Valle
Araujo, Pedro Soares de
Kubrusly, Flavia Saldanha
Sant'Anna, Osvaldo Augusto Brazil Esteves
Title in Portuguese
Encapsulação das proteínas do veneno de abelha em microesferas de PLGA (Poliéster de Ácido Láctico-Co-Glicólico) para imunoterapia.
Keywords in Portuguese
Biotecnologia
Imunologia médica
Imunoproteínas
Imunoterapia
Microencapsulação
Venenos de origem animal
Abstract in Portuguese
Nesta tese, foi apresentado um estudo sistemático para o desenvolvimento de uma nova formulação do veneno de abelha (BV) encapsulado em microesferas (MS) de PLGA para VIT. Estudou-se a estabilidade das proteínas do BV durante o processo de microencapsulação. Houve uma correlação entre as diferentes soluções salinas e as alterações na solubilidade e nas conformações estruturais do BV. Foram preparadas formulações BV-MS-PLGA estáveis com atividade biológica preservada. As MS tiveram eficiência de encapsulação entre 49-75% e perfis trifásicos de liberação do BV. Houve mudanças estruturais no BV liberado, mas seu reconhecimento imunológico foi mantido. Ensaios ex vivo e in vivo mostraram que as formulações evitaram as reações inflamatórias causadas pelo contato direto do BV com o organismo, aumentando a fagocitose das partículas com BV, o entregando diretamente ao meio intracelular. As formulações BV-MS-PLGAs estimularam a produção de anticorpos anti-BV equivalentes à VIT tradicional com a redução do número de injeções necessárias para se produzir o mesmo efeito imunológico. Portanto, as MS-PLGA contendo BV são seguras e eficazmente superiores à VIT tradicional.
Title in English
Encapsulation of bee venom proteins within PLGA (Polyester of Lactide-Co-Glycolide Acid) microspheres for immunotherapy.
Keywords in English
Biotechnology
Immunoproteins
Immunotherapy
Medical immunology
Microencapsulation
Poisons of animal origin
Abstract in English
In this thesis, it was presented a systematic study to develop a new formulation of bee venom (BV) encapsulated within PLGA-MS for VIT. It was studied the stability of BV proteins during the microencapsulation process. There was a correlation between the different salt solutions and changes in the solubility and structural conformations of BV. It was prepared stable BV-PLGA-MS formulations with preserved biological activity. The MS showed encapsulation efficiencies between 49-75%, and a triphasic release profiles of BV. Although structural changes were observed in the released BV, its immunological recognition was maintained. Ex vivo and in vivo assays showed that formulations avoided the inflammatory reactions caused by direct contact of BV and organism leading to increases in phagocytosis rate of particles containing BV, providing its delivery directly to the intracellular environment. These formulations could stimulate the production of anti-BV antibodies comparable to traditional VIT with reduced number of injections needed to produce the same immunological effect. Therefore, PLGA-MS containing BV are safe and effectively superior to the VIT traditional.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2010-11-16
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • TRINDADE, Reginaldo A., et al. PLGA microspheres containing bee venom proteins for preventive immunotherapy [doi:10.1016/j.ijpharm.2011.02.027]. International Journal of Pharmaceutics [online], 2012, vol. 423, n. 1, p. 124-133.
  • TRINDADE, Reginaldo Almeida da, S. DE ARAUJO, Pedro, and HELENA BUENO-DA-COSTA, Maria. Hoffmeister Ion Series Protected Bee Venom Proteins from Damages Induced by Microencapsulation Process [doi:10.2174/2210304X11202010054]. Drug Delivery Letters [online], 2012, vol. 2, n. 1, p. 54-59.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.