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Related Experiment Video

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In vivo Electroporation of Developing Mouse Retina
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New Method for Efficient siRNA Delivery in Retina Explants: Reverse Magnetofection.

Marco Bassetto1, Merve Sen2, Florent Poulhes1

  • 1OZ Biosciences, Parc scientifique de Luminy, Case 922, zone entreprise, 13288 Marseille, France.

Bioconjugate Chemistry
|June 3, 2021
PubMed
Summary

Researchers developed a novel "Reverse Magnetofection" method using magnetic nanoparticles (MNPs) for efficient RNA interference (RNAi) delivery to all retinal layers. This breakthrough offers a promising, non-toxic strategy for retinal gene therapy and drug development.

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Area of Science:

  • Ophthalmology
  • Nanotechnology
  • Molecular Biology

Background:

  • Increasing prevalence of retinal disorders causing visual impairment and blindness.
  • Limited effective treatments due to challenges in delivering drugs to the posterior eye segment.
  • Difficulties in delivering RNA interference (RNAi) to the inner retina.

Purpose of the Study:

  • To develop an efficient method for delivering RNAi to all retinal layers.
  • To establish an ex vivo model for high-content screening of retinal molecular drugs.
  • To overcome the limitations of current drug delivery systems for retinal therapies.

Main Methods:

  • Development of a magnetic nanoparticles (MNPs)-based transfection method.
  • Utilizing organotypic retinal explants as an ex vivo model.
  • Implementing a novel magnetic targeting approach termed "Reverse Magnetofection".

Main Results:

  • Demonstrated efficient delivery of small interfering RNA (siRNA) to all retinal layers in adult rat retinas.
  • Successfully attracted siRNA complexed to MNPs from culture media into retinal explants.
  • Established a non-toxic and effective method for RNAi delivery in retinal tissue.

Conclusions:

  • "Reverse Magnetofection" offers a novel, non-toxic strategy for RNAi-based gene and molecular therapy in the retina.
  • This method enables efficient siRNA delivery throughout the retina using magnetic targeting.
  • The approach is transferable to various organ explant systems for drug screening and development.