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A versatile upconversion surface evaluation platform for bio-nano surface selection for the nervous system.

Libing Fu1, Marco Morsch, Bingyang Shi

  • 1International Joint Centre for Biomedical Innovations, School of Life Sciences, Henan University, Jin Ming Avenue, Kaifeng, Henan 475004, China.

Nanoscale
|September 7, 2017
PubMed
Summary
This summary is machine-generated.

Developing nanoparticle surfaces for neurodegenerative disease treatment is key. This study created a platform showing PEG-COOH surfaces are best for neural applications, improving nanoparticle safety and efficacy.

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Area of Science:

  • Nanomedicine
  • Biomaterials Science
  • Neuroscience

Background:

  • Developing diagnostic and therapeutic nanotools for neurodegenerative diseases faces challenges with nanoparticle surface stability and cytotoxicity in the central nervous system.
  • The nano-bio interface is critical for nanoparticle performance and safety within biological environments.

Purpose of the Study:

  • To establish a comprehensive evaluation platform for selecting suitable nanoparticle surfaces for central nervous system applications.
  • To systematically assess the in vitro and in vivo performance of surface-functionalized upconversion nanoparticles (UCNPs).

Main Methods:

  • Fabrication of lanthanide-doped UCNPs with strong tissue-penetrating emission at 800 nm.
  • Functionalization of UCNPs with four different surfaces for comparative evaluation.
  • Systematic assessment of spectral emission, biophysical stability, cytotoxicity, and cell uptake using cultured neural cells (NSC-34) and zebrafish models.

Main Results:

  • Polyethylene glycol with carboxylic acid (PEG-COOH) emerged as the superior surface modification for UCNPs.
  • PEG-UCNPs demonstrated excellent dispersal and uptake into spinal motor neurons in living zebrafish.
  • The developed platform effectively evaluated nanoparticle surface suitability for neural applications.

Conclusions:

  • A versatile upconversion nanoparticle platform was developed for systematic in vitro and in vivo evaluation of nanoparticle surfaces.
  • PEG-COOH surface modification enhances UCNP bioavailability and neuronal uptake for potential theranostic applications in neurodegenerative diseases.
  • This approach provides valuable insights for designing future multifunctional nanosystems for neurological disorders.