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Related Experiment Videos

Modulating viral gene expression by aptamers to RNA structures.

Jean-Jacques Toulmé1, Fabien Darfeuille, Gaëlle Kolb

  • 1Inserm U386, IFR 66, Université Victor-Segalen, 146, rue Léo-Saignat, 33076 Bordeaux cedex 2, France. jean-jacques.toulme@bourdeaux.inserm.fr

Biology of the Cell
|July 18, 2003
PubMed
Summary

Researchers developed specific RNA-targeting oligonucleotides. These aptamers inhibit Human Immunodeficiency virus-1 and Hepatitis C virus replication by blocking essential viral gene expression and translation.

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Area of Science:

  • Molecular Biology
  • Virology
  • Biochemistry

Background:

  • RNA hairpins are crucial structural motifs in viral genomes.
  • Targeting these structures offers a potential antiviral strategy.
  • Specific RNA-protein interactions are key to viral replication.

Purpose of the Study:

  • To develop high-affinity, specific oligonucleotides against viral RNA hairpins.
  • To investigate the potential of these oligonucleotides as antiviral agents.
  • To demonstrate inhibition of viral transcription and translation.

Main Methods:

  • In vitro selection (SELEX) to identify aptamers.
  • Chemical modification of aptamers.
  • In vitro transcription assays.
  • Cell-free translation assays.

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  • Cell culture experiments.

    • Main Results:

    • Oligonucleotides with high affinity and specificity for target RNA hairpins were generated.
    • Anti-TAR aptamers competed with the viral protein Tat and inhibited HIV-1 transcription.
    • Antisense oligomers targeting HCV mRNA blocked translation in vitro and in cells.

    Conclusions:

    • Oligonucleotides can be effectively selected for specific RNA targets.
    • Developed aptamers show promise for inhibiting HIV-1 and HCV replication.
    • Targeting viral RNA structures is a viable antiviral therapeutic approach.