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Pinkernelle J, Raffa V, Calatayud MP, et al. Growth factor choice is critical for successful functionalization of nanoparticles. Front Neurosci. 2015;9:305doi: 10.3389/fnins.2015.00305.
Pinkernelle, J., Raffa, V., Calatayud, M. P., Goya, G. F., Riggio, C., & Keilhoff, G. (2015). Growth factor choice is critical for successful functionalization of nanoparticles. Frontiers in neuroscience, 9305. https://doi.org/10.3389/fnins.2015.00305
Pinkernelle, Josephine, et al. "Growth factor choice is critical for successful functionalization of nanoparticles." Frontiers in neuroscience vol. 9 (2015): 305. doi: https://doi.org/10.3389/fnins.2015.00305
Pinkernelle J, Raffa V, Calatayud MP, Goya GF, Riggio C, Keilhoff G. Growth factor choice is critical for successful functionalization of nanoparticles. Front Neurosci. 2015 Sep 02;9:305. doi: 10.3389/fnins.2015.00305. eCollection 2015. PMID: 26388717; PMCID: PMC4557102.
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Front Neurosci. 2015 Sep 02;9:305. doi: 10.3389/fnins.2015.00305. eCollection 2015.

Growth factor choice is critical for successful functionalization of nanoparticles.

Frontiers in neuroscience

Josephine Pinkernelle, Vittoria Raffa, Maria P Calatayud, Gerado F Goya, Cristina Riggio, Gerburg Keilhoff

Affiliations

  1. Department of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University of Magdeburg Magdeburg, Germany ; Institute for Biochemistry and Cell Biology, Otto-von-Guericke University of Magdeburg Magdeburg, Germany.
  2. Department of Biology, University of Pisa Pisa, Italy ; Institute of Life Science, Scuola Superiore Sant' Anna Pisa, Italy.
  3. Aragon Institute of Nanosciences, University of Zaragoza Zaragoza, Spain.
  4. Aragon Institute of Nanosciences, University of Zaragoza Zaragoza, Spain ; Department of Condensed Matter Physics, University of Zaragoza Spain.
  5. Institute of Life Science, Scuola Superiore Sant' Anna Pisa, Italy.
  6. Department of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University of Magdeburg Magdeburg, Germany.

PMID: 26388717 PMCID: PMC4557102 DOI: 10.3389/fnins.2015.00305

Abstract

Nanoparticles (NPs) show new characteristics compared to the corresponding bulk material. These nanoscale properties make them interesting for various applications in biomedicine and life sciences. One field of application is the use of magnetic NPs to support regeneration in the nervous system. Drug delivery requires a functionalization of NPs with bio-functional molecules. In our study, we functionalized self-made PEI-coated iron oxide NPs with nerve growth factor (NGF) and glial cell-line derived neurotrophic factor (GDNF). Next, we tested the bio-functionality of NGF in a rat pheochromocytoma cell line (PC12) and the bio-functionality of GDNF in an organotypic spinal cord culture. Covalent binding of NGF to PEI-NPs impaired bio-functionality of NGF, but non-covalent approach differentiated PC12 cells reliably. Non-covalent binding of GDNF showed a satisfying bio-functionality of GDNF:PEI-NPs, but turned out to be unstable in conjugation to the PEI-NPs. Taken together, our study showed the importance of assessing bio-functionality and binding stability of functionalized growth factors using proper biological models. It also shows that successful functionalization of magnetic NPs with growth factors is dependent on the used binding chemistry and that it is hardly predictable. For use as therapeutics, functionalization strategies have to be reproducible and future studies are needed.

Keywords: PC12 cells; functionalization; glial cell-line derived neurotrophic factor (GDNF); nanoparticles; nerve growth factor (NGF); organotypic spinal cord culture

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