1887

Abstract

Dengue virus (DENV) infection in humans can cause flu-like illness, life-threatening haemorrhagic fever or even death. There is no specific anti-DENV therapeutic or approved vaccine currently available, partially due to the possibility of antibody-dependent enhancement reaction. Small interfering RNAs (siRNAs) that target specific viral genes are considered a promising therapeutic alternative against DENV infection. However, , siRNAs are vulnerable to degradation by serum nucleases and rapid renal excretion due to their small size and anionic character. To enhance siRNA delivery and stability, we complexed anti-DENV siRNAs with biocompatible gold nanoparticles (AuNPs) and tested them . We found that cationic AuNP–siRNA complexes could enter Vero cells and significantly reduce DENV serotype 2 (DENV-2) replication and infectious virion release under both pre- and post-infection conditions. In addition, RNase-treated AuNP–siRNA complexes could still inhibit DENV-2 replication, suggesting that AuNPs maintained siRNA stability. Collectively, these results demonstrated that AuNPs were able to efficiently deliver siRNAs and control infection , indicating a novel anti-DENV strategy.

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2014-08-01
2021-03-08
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