Pharmaceutical Research

, Volume 32, Issue 1, pp 103–121 | Cite as

Nanomagnetic Activation as a Way to Control the Efficacy of Nucleic Acid Delivery

  • Bartosz F. Grześkowiak
  • Yolanda Sánchez-Antequera
  • Edelburga Hammerschmid
  • Markus Döblinger
  • Dietmar Eberbeck
  • Anna Woźniak
  • Ryszard Słomski
  • Christian Plank
  • Olga Mykhaylyk
Research Paper

ABSTRACT

Purpose

To explore the potential of magnetofection in delivering pDNA to primary mouse embryonic fibroblasts (PMEFs) and porcine fetal fibroblasts (PFFs) and investigate an effect of magnetic cell labeling on transfection efficacy.

Methods

The formulation and a dose of the magnetic vector were optimized. The efficacy of the procedure was quantified by vector internalization, transgene expression and cell iron loading upon specific labeling with Ab-conjugated magnetic beads or non-specific labeling with MNPs.

Results

Up to sixty percent of PMEF and PFF cells were transfected at low pDNA doses of 4–16 pg pDNA/cell. Specific labeling of the PMEFs with MNPs, resulted in a 3- and 2-fold increase in pDNA internalization upon magnetofection and lipofection, respectively, that yielded a 2–4-fold increase in percent of transgene-expressing cells. Non-specific cell labeling had no effect on the efficacy of the reporter expression, despite the acquisition of similar magnetic moments per cell. In PFFs, specific magnetic labeling of the cell surface receptors inhibited internalization and transfection efficacy.

Conclusions

Magnetic labeling of cell-surface receptors combined with the application of an inhomogenous magnetic field (nanomagnetic activation) can affect the receptor-mediated internalization of delivery vectors and be used to control nucleic acid delivery to cells.

KEY WORDS

magnetic cell labeling magnetic nanoassemblies magnetic nanoparticles nanomagnetic activation nucleic acid delivery 

ABBREVIATIONS

CPM

Counts per minutes

DMEM

Dulbecco’s modified Eagle’s medium

EDTA

Ethylenediaminetetraacetic acid

FBS

Fetal bovine serum

iPSCs

Induced pluripotent stem cells

MNPs

Magnetic nanoparticles

PBS

Dulbecco’s phosphate buffered saline

PCS

Photon correlation spectroscopy

PE

Phycoerythrin

PEI

Polyethylenimine

PFF

Porcine fetal fibroblasts

PMEF

Primary mouse embryonic fibroblasts

TEM

Transmission electron microscopy

TEOS

Tetraethyl orthosilicate

THPMP

3-(trihydroxysilyl) propylmethylphosphonate

Notes

ACKNOWLEDGMENTS AND DISCLOSURES

We are thankful to Mikołaj Grzeszkowiak for the work on transmission electron microscopy analysis of the microbeads. We gratefully acknowledge the support from the German Research Foundation through the DFG Research Unit FOR917 (Project PL 281/3-1, TR 408/6-1), from the German Federal Ministry of Education and Research through grants ZIM-KOOP ’STEP-MAG’, and from the Excellence Cluster ‘Nanosystems Initiative Munich’. The work was supported by the International PhD Projects Program of the Foundation for Polish Science operated within the Innovative Economy Operational Program (IE OP) 2007–2013 of the European Regional Development Fund.

Supplementary material

11095_2014_1448_MOESM1_ESM.pdf (1.4 mb)
ESM 1 (PDF 1423 kb)

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Bartosz F. Grześkowiak
    • 1
    • 2
    • 3
  • Yolanda Sánchez-Antequera
    • 1
  • Edelburga Hammerschmid
    • 1
  • Markus Döblinger
    • 4
  • Dietmar Eberbeck
    • 5
  • Anna Woźniak
    • 2
  • Ryszard Słomski
    • 2
    • 3
  • Christian Plank
    • 1
  • Olga Mykhaylyk
    • 1
    • 6
  1. 1.Institute of Experimental Oncology and Therapy ResearchKLinikum rechts der Isar der Technischen Universität MünchenMunichGermany
  2. 2.The NanoBioMedical CentreAdam Mickiewicz UniversityPoznanPoland
  3. 3.Department of Biochemistry and BiotechnologyPoznań University of Life SciencesPoznanPoland
  4. 4.Department of ChemistryLudwig-Maximilians-Universität MünchenMunichGermany
  5. 5.Physikalisch-Technische Bundesanstalt Abbestraße 2-12BerlinGermany
  6. 6.Institute of Experimental Oncology and Therapy ResearchTechnische Universität MünchenMunichGermany

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