Related Experiment Video
Updated: Jul 5, 2026
11:42
High Yield Expression of Recombinant Human Proteins with the Transient Transfection of HEK293 Cells in Suspension
Published on: December 28, 2015
Modified concatemeric oligonucleotide complexes: new system for efficient oligonucleotide transfer into mammalian
Olesya N Gusachenko Simonova1, Dmitrii V Pishnyi, Valentin V Vlassov
1Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia. olesya.simonova@niboch.nsc.ru
Human Gene Therapy
|May 7, 2008
Summary
Cholesterol modification enhances the cellular uptake of antisense oligonucleotides. This self-assembling system improves gene silencing without additional transfection agents, advancing oligonucleotide therapeutics.
Area of Science:
- Molecular Biology
- Biochemistry
- Drug Delivery
Background:
- Antisense oligonucleotides (ASOs) and small interfering RNAs (siRNAs) are key tools for gene expression manipulation and gene-targeted therapeutics.
- Poor cellular uptake remains a significant challenge for oligonucleotide-based therapies.
- Supramolecular concatemer formation can enhance oligonucleotide binding to mammalian cells.
Purpose of the Study:
- To improve the cellular delivery efficiency of oligonucleotide concatemers.
- To investigate the impact of cholesterol modification on oligonucleotide concatemer systems.
- To evaluate the uptake, cellular distribution, and biological activity of cholesterol-modified complexes.
Main Methods:
- Formation of supramolecular concatemeric complexes using antisense oligonucleotides and cholesterol-modified carrier oligonucleotides.
- Assessment of cellular uptake and distribution of these complexes.
- Evaluation of the biological activity, specifically target gene expression inhibition.
Main Results:
- Incorporation of antisense oligonucleotides into self-assembling concatemeric systems promotes cellular delivery.
- Cholesterol modification enhances the efficiency of oligonucleotide concatemer delivery into cells.
- Specific inhibition of target gene expression was achieved without supplementary transfection agents.
Conclusions:
- Cholesterol-modified oligonucleotide concatemers offer an effective strategy for enhancing cellular uptake.
- This self-assembling system facilitates efficient delivery and gene silencing, overcoming a major hurdle in oligonucleotide therapeutics.
- The findings support the potential of this approach for developing novel gene-targeted therapies.
