Bioconjugação de nanopartículas de ouro em peptídeos sintéticos baseados em sequências imunogênicas de NS1 oriundas dos vírus Dengue tipo I, II, III, e IV

Detalhes bibliográficos
Ano de defesa: 2017
Autor(a) principal: Costa, Danilo Soares
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal do Espírito Santo
BR
Mestrado em Biotecnologia
Centro de Ciências da Saúde
UFES
Programa de Pós-Graduação em Biotecnologia
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
61
Link de acesso: http://repositorio.ufes.br/handle/10/7111
Resumo: Recently, nanocarriers made of synthetic peptides conjugated with gold nanoparticles (AuNP) has been considered an efficient platform for immunogen delivery and production of antibodies. Although metal nanovaccines surpass issues arising from traditional vaccination with live attenuated pathogens or inactivated pathogens, the application and stability of nanobiointerfaces in biological systems remains a questionable gap related to the method for conjugation. This work describes bioconjugation via electrostatic attraction and covalent bound of immunogenic peptides on the surface of gold nanosphere and evaluates their stability in a large range of salt concentrations and pH. Protean® software predicted the immunogenic sequences in non-structural protein 1 (NS1) from the 04 dengue virus (DENV) serotypes, then synthesized in solid phase and characterized with HPLC and ICP-MS. Techniques such as UV-vis, Fluorimetry, FTIR, Raman, Zeta Potential and DLS, as well as TEM were employed to characterize both electrostatic and covalent approaches before and after bioconjugation. The interaction between peptide derived from DENV1 NS1 with AuNP demonstrated better efficiency in the connection process and in the stability of the conjugated nanbiomaterial for both approaches. Therefore, these data open new perspectives for the use of nanobioconjugates with immunogenic peptides as platforms for drug / immunogen delivery.