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Cationic switchable lipids: pH-triggered molecular switch for siRNA delivery.

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  • 1Faculty of Pharmacy, University of Montreal, P.O. Box 6128, Downtown Station, Montreal, QC, Canada. jeanne.leblond-chain@umontreal.ca.

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This summary is machine-generated.

Researchers developed pH-sensitive cationic lipidoids that improve endosomal escape for gene delivery. This breakthrough enables efficient gene knockdown in vitro and in vivo, paving the way for new therapeutic applications.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Molecular Engineering

Background:

  • Endosomal entrapment hinders the efficacy of many gene delivery systems.
  • Cationic lipidoids are widely explored for gene delivery due to their ability to complex with nucleic acids.
  • Stimulus-responsive materials offer enhanced control over drug and gene release.

Purpose of the Study:

  • To design and synthesize novel cationic lipidoids incorporating a pH-sensitive molecular switch.
  • To investigate the role of the molecular switch in endosomal escape and gene delivery efficiency.
  • To evaluate the in vitro and in vivo performance of the developed lipid nanoparticles for gene knockdown.

Main Methods:

  • Synthesis of cationic lipidoids with embedded pH-sensitive molecular switches.
  • Characterization of conformational changes in response to endosomal pH.
  • In vitro gene delivery assays and gene knockdown efficiency measurements.
  • In vivo studies to assess therapeutic efficacy and biodistribution.

Main Results:

  • The pH-sensitive molecular switch successfully triggered conformational changes at endosomal pH.
  • The developed cationic lipidoids demonstrated efficient endosomal escape.
  • The leading lipid nanoparticle formulation achieved significant gene knockdown both in vitro and in vivo.
  • The materials showed promise for therapeutic applications in gene delivery.

Conclusions:

  • pH-sensitive molecular switches integrated into cationic lipidoids can enhance endosomal escape for gene delivery.
  • The identified lipid material is effective for gene knockdown, demonstrating therapeutic potential.
  • This work provides a foundation for designing advanced stimulus-responsive molecular switches for drug and gene delivery systems.