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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Updated: Mar 22, 2026

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Reductive Decationizable Block Copolymers for Stimuli-Responsive mRNA Delivery.

Lutz Nuhn1,2, Leonard Kaps3, Mustafa Diken4

  • 1Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, D-55099, Mainz, Germany.

Macromolecular Rapid Communications
|April 15, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed smart cationic block copolymers for messenger ribonucleic acid (mRNA) delivery. These carriers improve cellular uptake and enable targeted release in the cytoplasm, advancing transient gene therapy applications.

Keywords:
RAFT polymerizationSPAACmRNA deliverypolyplexesstimuli-responsiveness

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Area of Science:

  • Polymer Chemistry
  • Biomaterials Science
  • Gene Therapy

Background:

  • Messenger ribonucleic acids (mRNAs) show promise for transient gene therapy.
  • Poor pharmacokinetic properties of mRNA necessitate advanced delivery systems.
  • Stimuli-responsive carriers are crucial for cellular uptake and controlled release.

Purpose of the Study:

  • To introduce a synthetic strategy for reductive decationizable cationic block copolymers.
  • To create carriers for effective mRNA complexation and cytoplasm-specific release.
  • To demonstrate the versatility of these carriers for advanced mRNA delivery.

Main Methods:

  • RAFT block copolymerization and postpolymerization modification were employed.
  • Disulfide-linked primary amines were incorporated into cationic block copolymers.
  • In vitro transfection experiments were conducted with fibroblasts and macrophages.

Main Results:

  • Cationic block copolymers effectively formed polyplexes with mRNA.
  • Reductive conditions in the cytoplasm facilitated mRNA release.
  • Tailor-made block copolymers mediated cell-specific mRNA transfection and gene expression.
  • Targeting units were ligated onto block copolymers for enhanced delivery.

Conclusions:

  • The developed reductive decationizable block copolymers are versatile mRNA carriers.
  • This system facilitates effective mRNA delivery and gene expression.
  • The approach holds significant potential for advanced mRNA delivery applications in gene therapy.