Related Experiment Videos
Inhibition of expression of SV40 virus large T-antigen by antisense oligodeoxyribonucleotides
P Westermann1, B Gross, G Hoinkis
1Zentralinstitut für Molekularbiologie, Akademie der Wissenschaften der DDR, Berlin-Buch.
Abstract:
Expression of large T-antigen in COS cells can be inhibited by treatment of cell monolayers with oligodeoxyribonucleotides complementary to large T mRNA, which were covalently linked to poly-L-lysine. Strongest inhibition was observed with conjugates of oligodeoxynucleotides that hybridize to the sequence immediately 3' to the cap structure of the mRNA. Treatment of SV40 virus-infected CV-1 cells with the same conjugates reduces the virus-induced large T-antigen expression by more than 80%.
Insights
Oligodeoxyribonucleotides linked to poly-L-lysine effectively inhibit large T-antigen expression in COS and CV-1 cells. Targeting mRNA sequences near the cap structure yielded the strongest inhibition of viral protein synthesis.
Area of Science:
- Molecular Biology
- Virology
- Antisense Technology
Background:
- Large T-antigen is a key protein in SV40 viral replication.
- Controlling viral gene expression is crucial for antiviral strategies.
- Oligodeoxyribonucleotides offer a potential method for targeted gene silencing.
Purpose of the Study:
- To investigate the inhibition of large T-antigen expression using modified oligodeoxyribonucleotides.
- To identify optimal target sequences on the large T mRNA for maximum inhibition.
- To evaluate the efficacy of these conjugates in virus-infected cells.
Main Methods:
- Synthesis of oligodeoxyribonucleotides covalently linked to poly-L-lysine.
- Treatment of COS cell monolayers with these conjugates.
- Treatment of Simian Virus 40 (SV40)-infected CV-1 cells with the conjugates.
- Quantification of large T-antigen expression levels.
Main Results:
- Conjugates of oligodeoxyribonucleotides and poly-L-lysine inhibited large T-antigen expression in COS cells.
- The strongest inhibition was achieved when oligodeoxyribonucleotides targeted the region 3' to the mRNA cap structure.
- Treatment of SV40-infected CV-1 cells reduced large T-antigen expression by over 80%.
Conclusions:
- Poly-L-lysine-conjugated oligodeoxyribonucleotides are effective in suppressing large T-antigen expression.
- Targeting specific regions of the mRNA, particularly near the cap structure, enhances inhibitory effects.
- This approach shows promise for controlling viral gene expression in infected cells.