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Related Concept Videos

Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

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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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Gene Therapy00:59

Gene Therapy

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Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be...
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Related Experiment Video

Updated: Apr 21, 2026

Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry
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Beyond branching: multiknot structured polymer for gene delivery.

Ahmed Aied1, Yu Zheng, Ben Newland

  • 1Charles Institute of Dermatology, University College Dublin , Dublin 4, Ireland.

Biomacromolecules
|November 7, 2014
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Summary
This summary is machine-generated.

New disulfide-reducible polymer nanocarriers offer enhanced gene delivery potency and low cytotoxicity for skin cells. These unique "multiknot" vectors show promise for treating dermatological diseases.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Gene Therapy

Background:

  • Polymer-based gene vectors are safer and easier to produce than viral vectors.
  • However, low transfection efficiency and high cytotoxicity limit their clinical use.
  • Existing polycationic vectors often exhibit toxicity due to excessive charge density.

Purpose of the Study:

  • To synthesize novel disulfide-reducible polymeric gene nanocarriers.
  • To evaluate their transfection potency and cytotoxicity, especially in skin cells.
  • To explore their potential for treating genetic skin disorders.

Main Methods:

  • Synthesis of unique 3D "multiknot" polymers using deactivation-enhanced atom transfer radical polymerization (DE-ATRP).
  • Characterization of nanocarrier structure and properties.
  • In vitro and in vivo transfection efficiency and cytotoxicity assays, including use in 3D skin equivalents.

Main Results:

  • The synthesized multiknot nanocarriers demonstrated significantly enhanced transfection potency compared to PEI and Lipofectamine2000.
  • These vectors exhibited low cytotoxicity, particularly in skin cells.
  • Successful mediation of collagen VII expression in skin equivalents from recessive dystrophic epidermolysis bullosa patients.

Conclusions:

  • The novel multiknot polymer nanocarriers represent a promising platform for gene therapy in dermatology.
  • Their dense, degradable architecture facilitates efficient DNA binding and release.
  • These findings support further investigation for therapeutic applications in skin diseases.