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Related Experiment Video

Updated: Jun 2, 2026

Protocol for MicroRNA Transfer into Adult Bone Marrow-derived Hematopoietic Stem Cells to Enable Cell Engineering Combined with Magnetic Targeting
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Protocol for MicroRNA Transfer into Adult Bone Marrow-derived Hematopoietic Stem Cells to Enable Cell Engineering Combined with Magnetic Targeting

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Efficient transfection method using deacylated polyethylenimine-coated magnetic nanoparticles.

Daisuke Kami1, Shogo Takeda, Hatsune Makino

  • 1Innovative Integration between Medicine and Engineering Based on Information Communications Technology, Yokohama National University Global COE Program, Yokohama, Japan. dkami@tmig.or.jp

Journal of Artificial Organs : the Official Journal of the Japanese Society for Artificial Organs
|May 3, 2011
PubMed
Summary

New magnetic nanoparticles coated with deacylated polyethylenimine (PEI max) significantly improve gene delivery efficiency for gene therapy. These PEI max-nanoparticles show high transfection rates and low cytotoxicity, even in serum conditions.

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Area of Science:

  • Biotechnology
  • Nanomedicine
  • Gene Therapy

Background:

  • Nonviral gene vectors often exhibit low transfection efficiencies, limiting their application in gene therapy.
  • Developing efficient and safe gene delivery systems is crucial for advancing therapeutic strategies.

Purpose of the Study:

  • To develop and characterize novel magnetic nanoparticles coated with deacylated polyethylenimine (PEI max) for enhanced gene delivery.
  • To evaluate the transfection efficiency and properties of these PEI max-nanoparticles as a gene carrier.

Main Methods:

  • Magnetic nanoparticles (d = 121.32 ± 27.36 nm) were synthesized and coated with PEI max, a cationic polymer.
  • The PEI max-nanoparticles were used for plasmid DNA delivery, with gene expression facilitated by an external magnetic field.
  • Transfection efficiency was assessed in cells, and the impact of serum on gene transfer was evaluated.

Main Results:

  • PEI max-coated magnetic nanoparticles achieved a high transfection efficiency of 81.1 ± 4.0%.
  • The PEI max-nanoparticles demonstrated superior gene delivery compared to traditional polyethylenimine (PEI).
  • Gene transfer efficiency remained unaffected by the presence of serum in cellular environments.

Conclusions:

  • PEI max-nanoparticles represent a promising gene carrier with significantly enhanced transfection efficiency.
  • These nanoparticles offer a versatile platform for delivering various DNA formulations.
  • The developed system exhibits low cytotoxicity and maintains efficacy in complex biological conditions, suggesting potential for clinical gene therapy applications.