Bioactive, luminescent and mesoporous europium-doped hydroxyapatite as a drug carrier

Biomaterials. 2008 Nov;29(32):4341-7. doi: 10.1016/j.biomaterials.2008.07.042. Epub 2008 Aug 19.

Abstract

Bioactive, luminescent and mesoporous europium-doped hydroxyapatite (Eu:HAp) was successfully prepared through a simple one-step route using cationic surfactant as template. The obtained multifunctional hydroxyapatite was performed as a drug delivery carrier to investigate the drug storage/release properties using ibuprofen (IBU) as a model drug. The structural, morphological, textural and optical properties were well characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), Fourier transform infrared spectroscopy (FT-IR), N(2) adsorption/desorption, and photoluminescence (PL) spectra, respectively. The results reveal that the multifunctional hydroxyapatites exhibit the typical ordered characteristics of the hexagonal mesostructure, and have rod-like morphology with the particle size of 20-40 nm in width and 100-200 nm in length. The drug storage/release test indicates that the luminescent HAp shows much similar drug loading amount and cumulative release rate to those of pure HAp. Interestingly, the IBU-loaded samples still show red luminescence of Eu(3+) ((5)D(0)-(7)F(1),(2)) under UV irradiation, and the emission intensities of Eu(3+) in the drug carrier system vary with the released amount of IBU, thus making the drug release be easily tracked and monitored by the change of the luminescence intensity.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Drug Carriers / chemistry*
  • Drug Carriers / metabolism*
  • Durapatite / chemistry*
  • Durapatite / metabolism*
  • Europium / chemistry*
  • Luminescence*
  • Microscopy, Electron, Scanning
  • Microscopy, Electron, Transmission
  • Porosity
  • Spectrum Analysis
  • X-Ray Diffraction

Substances

  • Drug Carriers
  • Europium
  • Durapatite