In vitro and in vivo targeted delivery of IL-10 interfering RNA by JC virus-like particles.

Abstract:

BACKGROUND:RNA interference (RNAi) is a powerful tool to silence gene expression post-transcriptionally. Delivering sequences of RNAi in vivo remains a problem. The aim of this study was to use JC virus (JCV) virus-like particles (VLPs) as a vector for delivering RNAi in silencing the cytokine gene of IL-10. METHODS:JCV VLPs were generated by recombinant JCV VP1 protein in yeast expression system. DNA fragment containing IL-10 shRNA was packaged into VLPs by osmotic shock. RESULTS:In RAW 264.7 cells, IL-10 shRNA was found to reduce IL-10 expression by 85 to 89%, as compared with VLPs alone. IL-10 shRNA did not cross-react with TNF-alpha mRNA or influence the expression of TNF-alpha. In BALB/c mice IL-10 shRNA could reduce 95% of IL-10 secretion. Surprisingly, it also down regulated TNF-alpha expression. CONCLUSIONS:We show for the first time that JCV VLPs empty capsids are competent vectors to deliver RNAi and are nontoxic to cells, suggesting that JCV VLPs is an efficient agent to deliver RNAi in both murine macrophage cells and BALB/c mice. This system provides an efficient means for delivering the RNAi for gene therapy purposes.

journal_name

J Biomed Sci

authors

Chou MI,Hsieh YF,Wang M,Chang JT,Chang D,Zouali M,Tsay GJ

doi

10.1186/1423-0127-17-51

subject

Has Abstract

pub_date

2010-06-24 00:00:00

pages

51

eissn

1021-7770

issn

1423-0127

pii

1423-0127-17-51

journal_volume

17

pub_type

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