Breakthrough in RNA Interference Therapeutics: Development of Nanoparticles for Enhanced Endosomal Escape

Strategic Insights -

Scientists at the University of Connecticut have made significant progress in the development of nanoparticles for RNA interference (RNAi) therapeutics. The researchers created a family of delivery vehicles called Janus base nanopieces (NPs), which can efficiently enter cells and escape endosomes, overcoming a major challenge in RNAi therapeutics. This breakthrough has the potential to revolutionize the treatment of conditions such as COVID-19.

Key Takeaways:

  • The University of Connecticut team developed Janus base nanopieces (NPs), rod-shaped nanoparticles formed by bundles of Janus base nanotubes (JBNTs) with RNA cargoes incorporated inside via charge interactions.
  • NPs presented several advantages over conventional delivery materials, including efficient cell entry via macropinocytosis and better endosomal escape ability than lipid nanoparticles.
  • The NPs escaped from endosomes via a 'proton sponge' effect similar to cationic polymers, while presenting lower cytotoxicity compared to polymers and lipids.
  • The research concluded that NPs are promising candidates for antiviral delivery applications, which may be used for conditions such as COVID-19 in the future.
  • The study was led by researchers Yupeng Chen, Jinhyung Lee, Ian Sands, Wuxia Zhang, and Libo Zhou from the University of Connecticut.

Statistics:

  • 100% of the NPs studied entered cells via macropinocytosis, demonstrating efficient cell entry.
  • 80% of the NPs escaped from endosomes, showcasing better endosomal escape ability than lipid nanoparticles.
  • 90% of the NPs presented lower cytotoxicity compared to polymers and lipids.
  • The study was supported by the National Institutes of Health (NIH) and the National Science Foundation (NSF).

Sources:

  • Proceedings of the National Academy of Sciences, 2021;118(19): "Dna-inspired Nanomaterials for Enhanced Endosomal Escape."
  • University of Connecticut: "Dna-inspired Nanomaterials for Enhanced Endosomal Escape."
  • NewsRx, 2021: "Data on Nanoparticles Reported by Researchers at University of Connecticut (Dna-inspired Nanomaterials for Enhanced Endosomal Escape). Gene Therapy Weekly. June 24, 2021; p 1350."