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Published on: September 13, 2012
Delivery of RNAi-Based Oligonucleotides by Electropermeabilization
Sophie Chabot1, Sandrine Pelofy, Justin Teissié
1Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie et de Biologie Structurale (IPBS) BP 64182, 205 route de Narbonne, Toulouse F-31077, France. Muriel.Golzio@ipbs.fr.
Abstract:
For more than a decade, understanding of RNA interference (RNAi) has been a growing field of interest. The potent gene silencing ability that small oligonucleotides have offers new perspectives for cancer therapeutics. One of the present limits is that many biological barriers exist for their efficient delivery into target cells or tissues. Electropermeabilization (EP) is one of the physical methods successfully used to transfer small oligonucleotides into cells or tissues. EP consists in the direct application of calibrated electric pulses to cells or tissues that transiently permeabilize the plasma membranes, allowing efficient in vitro and in vivo. cytoplasmic delivery of exogenous molecules. The present review reports on the type of therapeutic RNAi-based oligonucleotides that can be electrotransferred, the mechanism(s) of their electrotransfer and the technical settings for pre-clinical purposes.
Insights
Electropermeabilization (EP) enhances the delivery of RNA interference (RNAi) oligonucleotides for cancer therapeutics by temporarily opening cell membranes. This method overcomes biological barriers for effective gene silencing.
Area of Science:
- Molecular Biology
- Biotechnology
- Cancer Therapeutics
Background:
- RNA interference (RNAi) offers potent gene silencing for cancer therapy.
- Efficient delivery of RNAi oligonucleotides into target cells remains a significant challenge.
- Electropermeabilization (EP) is a physical method for enhancing cellular uptake.
Purpose of the Study:
- To review therapeutic RNAi oligonucleotides suitable for electrotransfer.
- To elucidate the mechanisms of RNAi oligonucleotide electrotransfer.
- To outline technical settings for preclinical electrotransfer applications.
Main Methods:
- Review of existing literature on RNAi and electropermeabilization.
- Analysis of mechanisms underlying EP-mediated delivery of oligonucleotides.
- Compilation of technical parameters for preclinical electrotransfer.
Main Results:
- EP facilitates the transient permeabilization of cell membranes.
- This permeabilization allows efficient in vitro and in vivo cytoplasmic delivery of RNAi oligonucleotides.
- Various therapeutic RNAi oligonucleotides are amenable to electrotransfer.
Conclusions:
- Electropermeabilization is a promising technique for delivering RNAi-based therapeutics.
- Understanding EP mechanisms and optimizing technical settings are crucial for preclinical development.
- EP holds potential for overcoming delivery barriers in RNAi cancer therapeutics.
