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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2010.tde-06102010-171847
Document
Author
Full name
Fábio Aparecido Barbosa Cabral
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Casseb, Jorge Simão do Rosário (President)
Benard, Gil
Ventura, Armando Morais
Title in Portuguese
Avaliação da carga viral plasmática do HTLV-1 em indivíduos assintomáticos e desenvolvendo a mielopatia associada ao HTLV-1/paraparesia espástica tropical (HAM/TSP).
Keywords in Portuguese
Carga viral (Avaliação)
Doenças da medula espinhal
HTLV-1
Linfócitos T
Mielopatia associada ao HTLV-1/paraparesia espástica tropical (HAM/TSP)
Nested PCR
Reação em Cadeia por Polimerase (PCR)
Abstract in Portuguese
O vírus linfotrópico das células T humanas tipo 1 (HTLV-1), é responsável por patologias como a mielopatia associada ao HTLV-1 ou paraparesia espástica tropical (HAM/TSP) e a leucemia/linfoma das células T do adulto (ATL) dentre outras. As vias de replicação até hoje demonstradas, não suportam a hipótese de um estado virêmico. Neste estudo, a detecção de partículas virais plasmáticas foi executada, por PCR em Tempo Real e Nested PCR em 190 amostras de pacientes infectados pelo HTLV-1(assintomáticos ou com HAM/TSP), em acompanhamento, no Instituto de Infectologia Emílio Ribas. 12 indivíduos (8%) testados por PCR em tempo real (n=150) e 6 indivíduos (18%) testados por Nested PCR (n=33, dado que sete amostras foram excluídas da análise) apresentaram RNA do HTLV-1 detectável no plasma. Em conclusão, foi possível identificar RNA plasmático do HTLV-1, tanto em pessoas assintomáticas quanto com HAM/TSP. Esta detecção abre novas possibilidades de discussão sobre a replicação do HTLV-1 e das vias de transmissão, sugerindo maiores investigações para elucidar o assunto.
Title in English
Evaluation of HTLV-1 plasmatic viral load in asymptomatic and HTLV-1-associated myelopathy/Tropical spastic paraparesis (HAM/TSP) individuals.
Keywords in English
Diseases of the spinal cord
HTLV-1
HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP)
Nested PCR
Polymerase Chain Reaction (PCR)
T lymphocytes
Viral load (Evaluation)
Abstract in English
The human T-cell lymphotropic virus type1 (HTLV-1) is responsible for some pathologies such as HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) and Adult T-cell Leukemia/ Lymphoma (ATL) among others. Its ways of replication so far presented do not support the hypothesis of a viremic stage. In this study, the detection of the plasmatic viral load was performed by real time PCR and Nested PCR in 190 samples from HTLV-1 infected individuals (Either Asymptomatic or HAM/TSP cases) following up at Instituto de Infectologia Emílio Ribas. 12 individuals (8%) tested by Real time PCR (n= 150) and 6 individuals (18%) tested by Nested PCR (n= 33, given that 7 samples were excluded from the analysis) presented detectable HTLV-1 RNA in the plasma. In conclusion, it was possible to indentify HTLV-1 plasmatic RNA in asymptomatic carriers as well as in HAM/TSP cases. This detection opens new possibilities of discussion about HTLV-1 replication and transmission pathways, suggesting further investigation for clarifying this matter.
 
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Publishing Date
2010-10-28
 
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