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Related Experiment Video

Updated: Jul 12, 2026

Controllable Ion Channel Expression through Inducible Transient Transfection

Controllable Ion Channel Expression through Inducible Transient Transfection

Published on: February 17, 2017

Transient suppression of transgene expression by means of antisense oligonucleotides: a method for the production of

Z Raykov¹, V Legrand, H E Homann

¹Program of Applied Tumor Virology, Abt F0100 and INSERM U375, Deutsches Krebsforschungszentrum, Heidelberg, Germany.

|April 9, 2002

Summary

Researchers developed a new method using antisense oligonucleotides to control toxic gene expression during recombinant adenovirus production. This strategy successfully produced adenoviruses with toxic genes, overcoming previous production challenges.

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Transgene Expression in Cultured Cells Using Unpurified Recombinant Adeno-Associated Viral Vectors

Transgene Expression in Cultured Cells Using Unpurified Recombinant Adeno-Associated Viral Vectors

Published on: October 20, 2023

Area of Science:

Molecular Biology
Gene Therapy
Virology

Background:

Recombinant adenoviruses are used for gene therapy, but delivering toxic genes is challenging.
Toxic gene expression can harm cells needed for vector production, limiting high-titer stock generation.

Purpose of the Study:

To develop a novel strategy for transiently down-regulating toxic transgene expression during vector production.
To enable the production of recombinant adenoviruses carrying toxic genes, such as the parvoviral NS1 protein.

Main Methods:

Utilized phosphorothioate-modified antisense oligodeoxyribonucleotides for post-transcriptional gene silencing.
Applied the antisense strategy to the production of hybrid adenoviruses encoding the cytotoxic parvoviral protein NS1.
Assessed the impact of antisense treatment on NS1 RNA and protein levels and vector production.

Main Results:

Adenovirus generation was suppressed when the toxic NS gene was included in the vector genome.
Antisense oligonucleotide treatment rescued the production of NS-harboring adenoviruses.
Treatment led to a significant reduction in NS RNA and protein levels in producer cells.

Conclusions:

Antisense oligonucleotides offer a viable strategy for managing harmful transgene expression during vector production.
This approach can overcome limitations in generating adenoviral and other gene therapy vectors with toxic payloads.