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Related Concept Videos

Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

138
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 20, 2026

Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry
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Decationized polyplexes for gene delivery.

Luís Novo1, Enrico Mastrobattista, Cornelus F van Nostrum

  • 1Utrecht University, Utrecht Institute for Pharmaceutical Sciences, Department of Pharmaceutics , 3584 CG Utrecht , The Netherlands w.e.hennink@uu.nl.

Expert Opinion on Drug Delivery
|November 27, 2014
PubMed
Summary

Decationized polyplexes offer a safer alternative for gene therapy by utilizing neutral polymers. These novel systems overcome the toxicity and efficiency issues associated with traditional polycationic gene delivery vectors.

Keywords:
biocompatibilitygene deliverynanoparticlepolymertargeting

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Area of Science:

  • Biomedical Engineering
  • Molecular Biology
  • Drug Delivery Systems

Background:

  • Synthetic nonviral vectors are crucial for gene therapy due to their manufacturing advantages and lower immunogenicity compared to viral vectors.
  • Polycationic structures are widely used for gene delivery, forming nanoparticles with nucleic acids, but exhibit significant in vivo toxicity and poor biodistribution.
  • Clinical translation of polycationic gene delivery systems is hindered by toxicity and suboptimal in vivo performance, especially upon systemic administration.

Discussion:

  • Decationized polyplexes represent a new generation of gene delivery systems designed to mitigate the drawbacks of polycationic vectors.
  • These systems employ neutral polymers with transient cationic charges and disulfide cross-links, ensuring nucleic acid entrapment without inherent toxicity.
  • The transient cationic charge and disulfide cross-linking maintain physicochemical stability and encapsulation efficiency while reducing systemic toxicity.

Key Insights:

  • Decationized polyplexes offer a promising solution to the toxicity and biodistribution challenges of conventional polycationic gene delivery systems.
  • The innovative design of decationized polyplexes allows for safe and efficient gene delivery, overcoming limitations of previous nonviral vectors.
  • These systems demonstrate potential for improved in vivo performance and reduced adverse effects in gene therapy applications.

Outlook:

  • Further research into decationized polyplexes could lead to the development of advanced, safe, and effective gene delivery platforms.
  • Clinical evaluation of decationized polyplexes is warranted to assess their therapeutic potential and safety profile in various gene therapy contexts.
  • This approach holds promise for overcoming current barriers in gene therapy, paving the way for broader clinical applications.