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Related Experiment Video

Updated: Jul 17, 2026

Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry
08:51

Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry

Published on: March 1, 2013

Octaarginine-modified multifunctional envelope-type nanoparticles for gene delivery.

I A Khalil1, K Kogure, S Futaki

  • 1Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan.

Gene Therapy
|February 3, 2007
PubMed
Summary

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This study introduces a novel multifunctional envelope-type nano device (MEND) for gene delivery. MEND shows efficient and safe gene transfection, demonstrating potential for enhanced hair growth applications.

Area of Science:

  • Biotechnology
  • Nanomedicine
  • Gene Therapy

Background:

  • Developing efficient and safe non-viral gene delivery systems is crucial for therapeutic applications.
  • Current viral vectors often exhibit toxicity and immunogenicity issues.
  • Mimicking viral structures offers a promising strategy for enhanced cellular uptake and endosomal escape.

Purpose of the Study:

  • To develop and characterize a novel multifunctional envelope-type nano device (MEND) for gene delivery.
  • To evaluate the transfection efficiency and cytotoxicity of MEND compared to adenovirus.
  • To assess the therapeutic potential of MEND for in vivo applications, specifically hair growth stimulation.

Main Methods:

  • Fabrication of MEND particles with a DNA core within a lipid envelope functionalized with octaarginine peptide.

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Last Updated: Jul 17, 2026

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  • Assessment of cellular uptake mechanism, identifying macropinocytosis mediated by the peptide.
  • In vitro transfection assays using a luciferase expression plasmid and comparison with adenovirus.
  • In vivo studies involving topical application of MEND carrying a hair growth-related gene (caBmpr1a) in a mouse model.

    • Main Results:

    • MEND particles successfully delivered DNA cargo into cells.
    • Octaarginine peptide facilitated macropinocytosis, leading to avoidance of lysosomal degradation.
    • MEND-mediated gene transfection achieved efficiency comparable to adenovirus but with significantly lower cytotoxicity.
    • Topical application of MEND carrying caBmpr1a gene demonstrated a significant positive impact on hair growth in vivo.

    Conclusions:

    • Multifunctional envelope-type nano device (MEND) represents a promising non-viral gene delivery platform.
    • MEND offers a safer alternative to viral vectors with comparable or superior transfection efficiency.
    • The demonstrated efficacy in promoting hair growth highlights the therapeutic potential of MEND in regenerative medicine.