Porous YAG:Nd3+ fibers with excitation and emission in the human "NIR optical window" as luminescent drug carriers.
Chemistry
; 18(9): 2609-16, 2012 Feb 27.
Article
em En
| MEDLINE
| ID: mdl-22271350
ABSTRACT
The design and preparation of luminescent drug carriers has been a prosperous area of research for many years. However, the excitation and/or emission wavelength of such luminescent drug carriers haven't been optimized in the so-called human "near infrared (NIR) optical window", thus restricting their practical applications. Herein, we report the synthesis of electrospun porous YAGNd(3+) (neodymium-doped yttrium aluminum garnet) fibers with both excitation and emission in the "NIR optical window" as luminescent drug carriers. The YAGNd(3+) porous fibers were characterized by SEM, TEM, XRD, scanning transmission electron microscopy-energy-dispersive X-ray spectroscopy (STEM-EDX), and photoluminescence (PL). Ibuprofen (IBU) was used as a model drug to evaluate the drug-loading capacities and release profiles of the samples. BMSCs (bone mesenchymal stem cells) were used as model human cells to investigate cytotoxicity. Our results indicated that the YAGNd(3+) fibers possessed a fine, irregularly porous fibrous morphology with an average diameter of 378 nm. The florescence of the sample (1064 nm) could be excited over a wide wavelength range in the NIR region. During the release process of IBU in simulated body fluid (SBF), along with the dissolving of the drug, the solvent entered into the pores, and the emission intensity of the YAGNd(3+) fibers at 1064 nm decreased gradually, owing to a quenching effect of the hydroxy groups, thus provided an approach to track and monitor drug release. In addition, cytotoxicity investigations revealed that these YAGNd(3+) fibers were biocompatible with human cells. Consequently, the porous YAGNd(3+) fibers are a promising material for applications as advanced drug carriers.
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Base de dados:
MEDLINE
Assunto principal:
Ítrio
/
Portadores de Fármacos
/
Alumínio
/
Neodímio
Limite:
Humans
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2012
Tipo de documento:
Article