In vitro evaluation of the L-peptide modified magnetic lipid nanoparticles as targeted magnetic resonance imaging contrast agent for the nasopharyngeal cancer
Journal
Journal of Biomaterials Applications
Journal Volume
28
Journal Issue
4
Pages
580-594
Date Issued
2013
Author(s)
Abstract
The purpose of this study was to analyze the encapsulation of superparamagnetic iron oxide nanoparticles (SPION) by the lipid nanoparticle conjugated with the 12-mer peptides (RLLDTNRPLLPY, L-peptide), and the delivery of this complex into living cells. The lipid nanoparticles employed in this work were highly hydrophilic, stable, and contained poly(ethylene-glycol) for conjugation to the bioactive L-peptide. The particle sizes of two different magnetic lipid nanoparticles, L-peptide modified (LML) and non-L-peptide modified (ML), were both around 170 nm with a narrow range of size disparity. The transversal relaxivity, r2, for both LML and ML nanoparticles were found to be significantly higher than the longitudinal relaxivity r1 (r2/r1 > 20). The in vitro tumor cell targeting efficacy of the LML nanoparticles were evaluated and compared to the ML nanoparticles, upon observing cellular uptake of magnetic lipid nanoparticles by the nasopharyngeal carcinoma cells, which express cell surface specific protein for the L-peptide binding revealed. In the Prussian blue staining experiment, cells incubated with LML nanoparticles indicated much higher intracellular iron density than cells incubated with only the ML and SPION nanoparticles. In addition, the MTT assay showed the negligible cell cytotoxicity for LML, ML and SPION nanoparticles. The MR imaging studies demonstrate the better T2-weighted images for the LML-nanoparticle-loaded nasopharyngeal carcinoma cells than the ML- and SPION-loaded cells. ? 2012 The Author(s).
Subjects
coating material; contrast agents; iron oxide; L-peptide; Lipid nanoparticle; nasopharyngeal cancer
SDGs
Other Subjects
Coating material; Contrast agent; L-peptide; Lipid nanoparticles; Nasopharyngeal cancer; Cell membranes; Cytology; Diseases; Ethylene; Iron oxides; Magnetic resonance imaging; Nanoconjugates; Nanoparticles; Peptides; Nanomagnetics; 3 (4,5 dimethyl 2 thiazolyl) 2,5 diphenyltetrazolium bromide; cell surface protein; ferric ferrocyanide; iron; l peptide; macrogol; magnetic lipid nanoparticle; nuclear magnetic resonance imaging agent; peptide derivative; solid lipid nanoparticle; superparamagnetic iron oxide nanoparticle; unclassified drug; article; conjugation; controlled study; cytotoxicity; encapsulation; evaluation; human; human cell; hydrophilicity; in vitro study; nasopharynx cancer; nuclear magnetic resonance imaging; particle size; priority journal; transmission electron microscopy; coating material; contrast agents; iron oxide; L-peptide; Lipid nanoparticle; nasopharyngeal cancer; Contrast Media; Humans; Magnetic Resonance Imaging; Magnetic Resonance Spectroscopy; Magnetics; Microscopy, Electron, Transmission; Nanoparticles; Nasopharyngeal Neoplasms; Particle Size; Powder Diffraction
Type
journal article