• 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.85.2014.tde-26022015-112419
Document
Author
Full name
Débora Christina Salum
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2014
Supervisor
Committee
Felinto, Maria Claudia França da Cunha (President)
Brant, Antonio Jedson Caldeira
Bustillos, José Oscar Willian Vega
Góes, Cláudia Akemi Kodaira
Kai, Jiang
Title in Portuguese
Marcadores à base de terras raras para detecção de estrogênios sinalizadores em fluídos biológicos
Keywords in Portuguese
estrogênio
luminescência
nanopartículas poliméricas
terras raras
Abstract in Portuguese
O desenvolvimento de nanosensores luminescentes, não tóxicos e biocompatíveis estão sendo utilizados para marcação e visualização de células em biologia celular e imunoensaios ultrassensíveis. Neste trabalho, marcadores biológicos à base de terras raras para a detecção do 17-β-estradiol (E2), em fluido biológico(plasma) foram estudados. Os complexos precursores à base de terras raras (Eu3+ e Tb3+) foram sintetizados e caracterizados. O complexo contendo tta- de Eu3+ e liganteauxiliar TOPO [Eu(tta)3(TOPO)2] registrou a maior eficiência de luminescência dentre todos os demais compostos estudados e foi escolhido como sonda luminescente para desenvolvimento das etapas seguintes deste trabalho. Este complexo foi incorporado às matrizes poliméricas, PMMA e PHB, em diferentes concentrações de dopagens pordois métodos distintos: nanoprecipitação crioscópica e pela técnica de emulsão-difusão. As nanopartículas poliméricas de PMMA demonstraram maior eficiêncialuminescente quando dopadas com concentração de 5% do complexo precursor [Eu(tta)3(TOPO)2]. Estas nanopartículas foram funcionalizadas com 1,6 hexodiamino eposteriormente foram ligadas a um dialdeído que servirá como ponte na reação comas entidades biológicas. No entanto, devido à transferência de energia do sistemaorgânico Ac-Ac/nanossensor, as nanopartículas poliméricas luminescentes de PHBdemonstraram maior intensidade de sinal para a detecção do 17-β-estradiol por espectrofluorimetria. Pode-se concluir que as nanopartículas produzidas e testadasneste trabalho são fortes candidatas para a detecção do 17-β-estradiol em plasma sanguíneo ou outras entidades biológicas, apresentando opções diagnósticas, conduta extremamente importante para direcionamento terapêutico.
Title in English
Markers based on rare earths for detection of estrogen indicators in biological fluids
Keywords in English
estrogen
luminescence
polymeric nanoparticle
rare earths
Abstract in English
The development of luminescent, non-toxic and biocompatible nanosensors are being used for marker and imaging of cells in cellular biology and ultrasensitive immunoassays. In this work, biological markers based on rare earths for detection of 17 β -estradiol (E2), in biological fluids (Plasmon), were studied. The precursor complexes based on rare earths ( Eu3+ and Tb3+) were synthesized and characterized. The complex containing tta Eu3+ and secondary ligand TOPO- [Eu(tta)3(TOPO)2] registered the highest luminescence efficiency among all other compounds studied and was chosen as luminescent probe for the following development stages of this work. This complex was doped into polymer matrices, PMMA and PHB, at different concentrations of doping by two different methods: cryoscopic nanoprecipitation and emulsion-diffusion technique. The PMMA polymer nanoparticles demonstrated higher luminescence efficiency when doped with 5% concentration of the precursor complex [Eu(tta)3(TOPO)2]. These nanoparticles were functionalized with 1,6 diaminohexane and later they were linked to a dialdehyde that will serve as a bridge in the reaction with the biological entities . These nanoparticles were functionalized with 1,6 diaminohexane and later they were linked to a dialdehyde that can serve as a bridge in the reaction with the biological entities. Due to the energy transfer Ac- Ac/nanosensor, the PHB polymeric nanoparticles showed higher luminescence intensity signal for the detection of 17- β -estradiol by spectrofluorimetry. It can be concluded that the nanoparticles produced and tested in this work are strong candidates for the detection of 17β- estradiol in the blood plasma or others biological entities, presenting diagnostic options, an extremely important conduct for therapeutic direction.
 
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.
2014SalumDebora.pdf (8.78 Mbytes)
Publishing Date
2015-03-04
 
WARNING: Learn what derived works are clicking here.
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.