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Related Experiment Video

Updated: May 24, 2026

Preparation of Multifunctional Silk-Based Microcapsules Loaded with DNA Plasmids Encoding RNA Aptamers and Riboswitches
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Promising plasmid DNA vector based on APTES-modified silica nanoparticles.

Tuck-yun Cheang1, Bing Tang, An-wu Xu

  • 1Department of Vascular Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.

International Journal of Nanomedicine
|March 10, 2012
PubMed
Summary

Aminopropyltriethoxysilane-functionalized silicon dioxide nanoparticles (APTES-SiNPs) show high gene transfection efficiency comparable to Lipofectamine 2000. These novel nonviral gene therapy vectors exhibit reduced cytotoxicity, offering a promising alternative for in vivo applications.

Keywords:
Lipofectamine® 2000aminopropyltriethoxysilanegene therapy vectornanomedicinesilicon dioxide nanoparticles

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Gene Therapy

Background:

  • Nanoparticles offer significant potential for biomedical applications, including gene and drug delivery.
  • Conventional gene therapy vectors like viral vectors, organic polymers, and liposomes have critical drawbacks for in vivo use.

Purpose of the Study:

  • To develop and characterize aminopropyltriethoxysilane-functionalized silicon dioxide nanoparticles (APTES-SiNPs) as a nonviral gene therapy vector.
  • To compare the gene transfection efficiency and cytotoxicity of APTES-SiNPs with a standard transfection agent, Lipofectamine® 2000.

Main Methods:

  • Synthesis and functionalization of silicon dioxide nanoparticles with aminopropyltriethoxysilane (APTES-SiNPs).
  • Characterization of APTES-SiNPs for their physical and chemical properties.
  • Evaluation of gene transfection efficiency using plasmid DNA.
  • Assessment of cytotoxicity of APTES-SiNPs compared to Lipofectamine® 2000.

Main Results:

  • APTES-SiNPs demonstrated gene transfection efficiency nearly equivalent to Lipofectamine® 2000.
  • APTES-SiNPs exhibited significantly lower cytotoxicity compared to Lipofectamine® 2000.
  • The developed nanoparticles effectively transfected plasmid DNA into cells.

Conclusions:

  • APTES-SiNPs represent a promising nonviral gene therapy vector.
  • These nanoparticles offer a potential solution to overcome the limitations of conventional gene delivery systems.
  • The reduced cytotoxicity of APTES-SiNPs enhances their potential for safe and effective in vivo gene therapy applications.