Superparamagnetic iron oxide-gold nanoparticles conjugated with porous coordination cages: Towards controlled drug release for non-invasive neuroregeneration

Nanomedicine. 2021 Jul:35:102392. doi: 10.1016/j.nano.2021.102392. Epub 2021 Apr 16.

Abstract

This paper reports a smart intracellular nanocarrier for sustainable and controlled drug release in non-invasive neuroregeneration. The nanocarrier is composed by superparamagnetic iron oxide-gold (SPIO-Au) core-shell nanoparticles (NPs) conjugated with porous coordination cages (PCCs) through the thiol-containing molecules as bridges. The negatively charged PCC-2 and positively charged PCC-3 are compared for intracellular targeting. Both types result in intracellular targeting via direct penetration across cellular membranes. However, the pyrene (Py)-PEG-SH bridge enabled functionalization of SPIO-Au NPs with PCC-3 exhibits higher interaction with PC-12 neuron-like cells, compared with the rhodamine B (RhB)-PEG-SH bridge enabled case and the stand-alone SPIO-Au NPs. With neglectable toxicities to PC-12 cells, the proposed SPIO-Au-RhB(Py)-PCC-2(3) nanocarriers exhibit effective drug loading capacity of retinoic acid (RA) at 13.505 μg/mg of RA/NPs within 24 h. A controlled release of RA is achieved by using a low-intensity 525 nm LED light (100% compared to 40% for control group within 96 h).

Keywords: Intracellular targeting; Non-invasive neuroregeneration; Porous coordination cages; Superparamagnetic iron oxide-gold nanoparticles; Sustainable and controlled drug release.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Delayed-Action Preparations / chemistry
  • Delayed-Action Preparations / pharmacokinetics
  • Delayed-Action Preparations / pharmacology
  • Drug Carriers* / chemistry
  • Drug Carriers* / pharmacokinetics
  • Drug Carriers* / pharmacology
  • Ferric Compounds* / chemistry
  • Ferric Compounds* / pharmacokinetics
  • Ferric Compounds* / pharmacology
  • Gold* / chemistry
  • Gold* / pharmacokinetics
  • Gold* / pharmacology
  • Nanoparticles* / chemistry
  • Nanoparticles* / therapeutic use
  • Nerve Regeneration / drug effects*
  • PC12 Cells
  • Porosity
  • Rats
  • Tretinoin* / chemistry
  • Tretinoin* / pharmacokinetics
  • Tretinoin* / pharmacology

Substances

  • Delayed-Action Preparations
  • Drug Carriers
  • Ferric Compounds
  • ferric oxide
  • Tretinoin
  • Gold