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- Title
Establishment of a Screening System for Selection of siRNA Target Sites Directed against Hepatitis B Virus Surface Gene.
- Authors
Zhou, Xiu-Min; Lin, Ju-Sheng; Shi, Yi; Tian, De-An; Huang, Huan-Jun; Zhou, He-Jun; Jin, You-Xin
- Abstract
To study the inhibitory effects of plasmid-derived small interfering RNA (siRNA) and synthetic siRNA on the expression of the hepatitis B virus surface (HBs) gene, three plasmid-derived siRNAs and one synthetic siRNA that complement the coding region of the HBs gene were prepared. The HBs expression plasmid pHBs-EGFP was also constructed. HeLa cells were co-transfected with pHBs-EGFP and the above siRNAs. The HBs mRNA quantities were measured by reverse-transcription PCR, and the level of HBs-EGFP fusion protein was quantified by fluorescent microscope. The concentrations of the hepatitis B virus surface antigen (HBsAg) derived from the culture supernatant of transfected HepG2.2.15 cells were measured by an enzyme-linked immunosorbent assay (ELISA) kit. The results showed that the three plasmid-derived siRNAs and the synthetic siRNA can effectively reduce the quantities of HBs mRNA and protein. The plasmid-derived siRNA psiRNA1 was found to be the most effective inhibitor of HBs expression. It can inhibit HBs-EGFP expression by 63.3% and suppress HBs mRNA by 75.6%. To further substantiate the above observations, psiRNA1 was transfected into HepG2.2.15 cells (an HBV secreting cell line). The transfections resulted in almost complete blockage of HBsAg production, whereas control vector-transfected cells secreted high levels of HBsAg 7 days post-transfection. In conclusion, our data suggests that RNA interference (RNAi) is an efficient approach for reducing the level of HBs transcripts and proteins and for suppressing HBsAg production.Edited byZheng-Hong YUAN
- Subjects
SMALL interfering RNA; HEPATITIS B virus; PLASMIDS; VIRAL envelopes; POLYMERASE chain reaction; CYTOPLASMIC inheritance; CELL surface antigens
- Publication
Acta Biochimica et Biophysica Sinica, 2005, Vol 37, Issue 5, p310
- ISSN
1672-9145
- Publication type
Article
- DOI
10.1111/j.1745-7270.2005.00049.x