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Related Concept Videos

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Membrane-enclosed structures called vesicles transport proteins and lipids across the cell. The vesicles derive their cargo from the plasma membrane, Golgi, ER, or endosome. Coated vesicles are spherical, protein-coated carriers with a 50–100 nm diameter that mediate bidirectional transport between the ER and the Golgi. The distribution of proteins between the ER and Golgi complex is dynamic and is maintained by different coated vesicles. Their formation is driven by the assembly of...
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Thiol-Functionalized Block Copolymer Vesicles.

J Rosselgong1, A Blanazs1, P Chambon1

  • 1Department of Chemistry, Dainton Building, The University of Sheffield, Sheffield, South Yorkshire, S3 7HF, United Kingdom.

ACS Macro Letters
|May 24, 2022
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Summary
This summary is machine-generated.

Researchers created thiol-functionalized block copolymer vesicles using polymerization-induced self-assembly. These versatile nanoparticles can be easily modified for potential drug delivery applications, showing promise for enhanced muco-adhesion.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Block copolymer vesicles are self-assembled nanostructures with potential applications in drug delivery.
  • RAFT-mediated polymerization-induced self-assembly (PISA) is a powerful technique for creating well-defined polymer architectures.
  • Functionalization of nanoparticles is crucial for targeted delivery and enhanced therapeutic efficacy.

Purpose of the Study:

  • To develop a facile method for preparing thiol-functionalized block copolymer vesicles.
  • To demonstrate the versatility of these vesicles for subsequent modification and functionalization.
  • To explore the potential of these thiol-functionalized vesicles for drug delivery applications, particularly focusing on muco-adhesion.

Main Methods:

  • Synthesis of disulfide-functionalized poly(glycerol monomethacrylate) macro-chain transfer agent (macro-CTA).
  • Chain extension of macro-CTA with 2-hydroxypropyl methacrylate via RAFT-mediated PISA to form diblock copolymer vesicles.
  • Reductive cleavage of disulfide bonds to generate thiol groups.
  • Post-assembly functionalization of thiol groups with cationic or fluorescent moieties.

Main Results:

  • Successfully prepared thiol-functionalized block copolymer vesicles through RAFT-mediated PISA.
  • Demonstrated efficient reductive cleavage of disulfide bonds to yield reactive thiol groups.
  • Achieved facile derivatization of vesicles with cationic groups or fluorescent tags (rhodamine B).
  • Anticipated enhanced muco-adhesion properties for potential drug delivery applications.

Conclusions:

  • Thiol-functionalized block copolymer vesicles can be readily synthesized using RAFT-PISA.
  • The generated thiol groups allow for straightforward post-assembly modification.
  • These functionalized vesicles hold promise for advanced drug delivery systems due to potential muco-adhesion.