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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Nanoassemblies of Chitosan-Based Polyelectrolyte Complexes as Nucleic Acid Delivery Systems.

Hussein H Genedy1, Thierry Delair1, Pierre Alcouffe1

  • 1Université Claude Bernard Lyon 1, UMR 5223, CNRS, INSA Lyon, Université Jean Monnet, Ingénierie des Matériaux Polymères, F-69622 Villeurbanne, France.

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Chitosan-dextran sulfate polyelectrolyte complexes form stable, sterilizable nanovectors for nucleic acid delivery. These biocompatible nanoassemblies offer a green and scalable platform for targeted gene therapy applications.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Drug Delivery

Background:

  • Effective nucleic acid delivery necessitates vectorization for nuclease protection, immune evasion, and cellular targeting.
  • Ideal nanovectors must be safe, manufacturable, and stable for clinical applications.

Purpose of the Study:

  • To develop and characterize novel, biocompatible nanovectors for nucleic acid delivery using a green synthesis approach.
  • To demonstrate the potential of chitosan-based polyelectrolyte complexes as versatile nanocarriers.

Main Methods:

  • Utilized polyelectrolyte complexation of chitosan and dextran sulfate at 25 °C in water.
  • Characterized nanoassemblies for size (20-35 nm), colloidal stability (>1 year), and steam sterilizability.
  • Demonstrated encapsulation/adsorption of model nucleic acids and surface attachment of targeting agents.

Main Results:

  • Green synthesis yielded stable nanoassemblies (20-35 nm) with long-term colloidal stability (>1 year).
  • Nanovectors were steam sterilizable and capable of carrying nucleic acids via encapsulation or adsorption.
  • Surface functionalization with targeting agents was successfully achieved.

Conclusions:

  • Chitosan-based polyelectrolyte complexes represent a promising, biocompatible platform for nanovector development.
  • The green synthesis process offers a scalable and safe method for producing stable nanocarriers.
  • These nanovectors show potential for targeted nucleic acid delivery in therapeutic applications.