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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2008.tde-27032009-154240
Document
Author
Full name
Juliana Nogueira Martins Rodrigues
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2008
Supervisor
Committee
Durigon, Edison Luiz (President)
Harsi, Charlotte Marianna
Massad, Eduardo
Oliveira, Maria Isabel de
Stewien, Klaus Eberhard
Title in Portuguese
Caracterização molecular do Epstein-Barr vírus (EBV) em pacientes portadores de HIV, em tratamento, atendidos no sistema hospitalar do sistema penitenciário do Estado de São Paulo.
Keywords in Portuguese
Biologia molecular
Sequenciamento genético
Virologia médica
Virologia molecular
Vírus Epstein-Barr
Vírus oncogênico
Abstract in Portuguese
O Epstein-Barr vírus (EBV) é a única espécie humana pertencente ao gênero Lymphocryptovirus. A transmissão ocorre através da saliva contaminada e geralmente ainda na infância. Nosso estudo analisou 165 amostras clínicas de pacientes, portadores de HIV, em tratamento com antiretrovirais, atendidos no Sistema Hospitalar do Sistema Penitenciário do Estado de São Paulo. Nosso enfoque foi pesquisar o EBV nas células mononucleares do sangue periférico, através das técnicas de PCR, Nested-PCR e seqüenciamento de nucleotídeos. Os resultados obtidos, indicaram que 11,51% (19) das amostras analisadas, apresentaram-se positivas para o EBV. Essas 19 amostras, foram seqüenciadas com primers específicos para a região da EBNA-1 (Epstein Barr Nuclear Antigen 1). As amostras foram alinhadas com o auxílio do DNASTAR. Ao alinharmos as amostras, encontramos uma troca de base (de G para A) em 7 amostras e essa troca não alterou a conformação da proteína EBNA-1. Na análise filogenética de nossas sequências com as depositadas no GenBank, foi possível observar dois grupos, que representam tipo 1 e o tipo 2 do EBV. 100% das amostras estudadas por nós foram identificadas como pertencentes ao grupo que caracteriza o tipo 2. Sendo assim, as 7 amostras que apresentaram a troca sugerem a origem um novo subtipo.
Title in English
Molecular characterization of Epstein-Barr virus (EBV) in HIV patients in treatment from the hospitalar system in the penitentiary system from São Paulo State, Brazil.
Keywords in English
Epstein-barr virus
Genetic sequency
Medical virology
Molecular biology
Molecular virology
Oncogenic virus
Abstract in English
The Epstein-Barr Virus (EBV) is the only species to the genus Lymphocriptovirus that infects humans. One of the possible route for its transmission thought by contamined saliva and usually occurs in the childhood. This study analysed 165 clinical samples from HIV infected patients, treated by HARRT, attended in the Hospitalar System in the Penitentiary System from Sao Paulo State. The aim of this study was to search EBV in peripheral blood mononuclear cells by PCR, Nested-PCR and sequencing analysis. The results showed 11,51% of the analysed samples, positive for EBV. This samples, was sequenced with specifics primers from the EBNA-1 (Epstein Barr Nuclear Antigen 1) region. The samples were aligned by DNASTAR program. The aligned sequences showed the base conversion G to A in seven samples. This conversion caused no alteration in the EBNA-1 protein conformation. In the phylogenetic analysis the studied sequences with the sequences from GenBank was possible to observe two groups represented with type 1 and type 2 from EBV. 100% the samples studied was identified with the group characterized by the type 2 to EBV. So the seven samples showed the conversion, suggesting the origin of the one new subtype.
 
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Publishing Date
2009-04-06
 
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