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Related Experiment Video

Updated: Apr 3, 2026

Long-term Silencing of Intersectin-1s in Mouse Lungs by Repeated Delivery of a Specific siRNA via Cationic Liposomes. Evaluation of Knockdown Effects by Electron Microscopy
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Long-term Silencing of Intersectin-1s in Mouse Lungs by Repeated Delivery of a Specific siRNA via Cationic Liposomes. Evaluation of Knockdown Effects by Electron Microscopy

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Cuboplexes: Topologically Active siRNA Delivery.

Hojun Kim1, Cecilia Leal1

  • 1Materials Science and Engineering Department, University of Illinois at Urbana-Champaign , 1304 West Green Street, Urbana, Illinois 61801, United States.

ACS Nano
|September 22, 2015
PubMed
Summary
This summary is machine-generated.

Novel PEGylated cuboplexes enhance small interfering RNA (siRNA) delivery by utilizing unique internal structures for improved endosomal escape, surpassing traditional lipoplex systems for gene silencing.

Keywords:
PEGylated liposomesbicontinuous cubic phasescubosomesliposomesnanomedicinenanoparticlessiRNA delivery

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Area of Science:

  • Biotechnology
  • Nanomedicine
  • Molecular Biology

Background:

  • RNA interference (RNAi) technology shows promise but lacks FDA-approved human systems.
  • Nanoparticle physicochemical properties are crucial for biological stability and siRNA delivery efficiency.
  • Endosomal escape remains a critical challenge for RNAi therapeutics.

Purpose of the Study:

  • To design and evaluate novel lipid-based nanoparticles for enhanced siRNA delivery.
  • To investigate the role of internal nanoparticle structure in promoting endosomal escape.
  • To compare the gene silencing efficiency of new cuboplexes with traditional lipoplexes.

Main Methods:

  • Development of sterically stabilized lipid-based particles with bicontinuous cubic internal structures (cuboplexes).
  • Loading of large amounts of small interfering RNA (siRNA) into the cuboplexes.
  • Evaluation of particle-endosomal membrane interactions, focusing on elasticity energetics.
  • Assessment of gene knockdown efficiencies in comparison to traditional lipoplexes.

Main Results:

  • The designed PEGylated cuboplexes demonstrated efficient siRNA loading and delivery.
  • Cuboplex-endosomal membrane interactions were governed by elasticity energetics, facilitating endosomal disruption.
  • The cuboplex system achieved superior gene silencing efficiencies compared to conventional lipoplexes.
  • Steric stabilization contributed to adequate biodistribution profiles.

Conclusions:

  • Internal nanoparticle structure is a key factor in enhancing siRNA delivery and endosomal escape.
  • PEGylated cuboplexes represent a promising next-generation carrier for RNAi therapeutics.
  • This approach overcomes limitations of traditional lipoplexes, paving the way for improved gene silencing therapies.