An inverted-repeat RNA construct for silencing dengue virus type 2 pre-membrane gene suppresses viral replication in BHK-21 cells / 南方医科大学学报
Journal of Southern Medical University
; (12): 642-648, 2013.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-306494
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the anti-viral effects of a plasmid expressing an inverted-repeat RNA targeting dengue virus type-2 (DENV-2) pre-membrane (prM) gene.</p><p><b>METHOD</b>Suckling mice were inoculated with live DENV-2 in the brain. The total RNA was extracted from the brain tissue of the infected mice, and the prM gene fragments were amplified by RT-PCR and then subcloned into XhoI/EcoR I of the pcDNA3.1(+) plasmid in antisense orientation to construct the plasmid pcDNA-asprM. DENV-2 prM sequences were also subcloned into pMD18-T-vector in sense orientation to construct the plasmid pMD18-T- prM. pcDNA-irRNA was constructed by inserting in sense orientation the prM fragment isolated from pMD18-T-prM into the NheI/Kpn I of pcDNA-asprM. The plasmid pcDNA-irRNA was transfected into BHK-21 cells and the anti-viral effects were analyzed by semi-quantitative PCR and real-time PCR.</p><p><b>RESULTS</b>Transfection with the plasmid pcDNA-irRNA caused a reduction of NS3 mRNA expression level by 28% in BHK-21 cells following a 96-h challenge with DENV-2 as compared to the cells without plasmid transfection (positive control). The viral copies in pcDNA-irRNA-transfected cells was 1.44-fold lower than those in the positive control cells following a 72-h virus challenge, and the mRNA expression levels of NS1 were also significantly lower in the transfected cells at 96 h after viral challenge (P<0.05) as shown by real-time quantitative PCR.</p><p><b>CONCLUSION</b>The inverted-repeat RNA for DENV-2 prM gene silencing can suppress DENV-2 replication in BHK-21 cells, which provides a basis for developing dengue virus gene vaccine.</p>
Texto completo:
Disponível
Contexto em Saúde:
ODS3 - Saúde e Bem-Estar
/
Doenças Negligenciadas
Problema de saúde:
Meta 3.3: Acabar com as doenças tropicais negligenciadas e combater as doenças transmissíveis
/
Dengue
Base de dados:
WPRIM (Pacífico Ocidental)
Assunto principal:
Fisiologia
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Replicação Viral
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RNA Viral
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Sequência de Bases
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Células Cultivadas
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Proteínas do Envelope Viral
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Sequências Repetidas Terminais
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Inativação Gênica
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Vírus da Dengue
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Genética
Limite:
Animais
Idioma:
Chinês
Revista:
Journal of Southern Medical University
Ano de publicação:
2013
Tipo de documento:
Artigo