Gold nanoparticles capped by a GC-containing peptide functionalized with an RGD motif for integrin targeting(715 views) Scarí G, Porta F, Fascio U, Avvakumova S, Dal Santo V, De Simone M, Saviano M, Leone M, Del Gatto A, Pedone C, Zaccaro L
Keywords: Arginylglycylaspartic Acid, Gold Nanoparticle, Integrin, Stabilizing Agent, Amino Acid Sequence, Biocompatibility, Cell Nucleus, Colloid, Confocal Microscopy, Gc Rich Sequence, Human, Human Cell, Infrared Spectroscopy, Light Scattering, Nuclear Magnetic Resonance, Peptide Synthesis, Protein Motif, Protein Targeting, Thermogravimetry, Transmission Electron Microscopy, Tumor Cell Line, Ultraviolet Spectroscopy, Magnetic Resonance Spectroscopy, Metal Nanoparticles, Oligopeptides, Spectrophotometry, Fourier Transform Infrared,
Affiliations: *** IBB - CNR ***
Dipartimento di Chimica Inorganica Metallorganica Analitica Lamberto Malatesta, University of Milan and CNR-Istituto di Scienze e Tecnologie Molecolari, Via Venezian 21, Milan 20133, Italy.
Dipartimento di Biologia, CIMA Center, University of Milan, Via Golgi 19, Milan 20133, Italy
Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone, 16, Naples 80134, Italy
Istituto di Crystallografia, CNR, Via Amendola 122/O, Bari 70126, Italy
Dipartimento Delle Scienze Biologiche, Universitá di Napoli Federico II, Via Mezzocannone, 16, Naples 80134, Italy
C.I.M.A. Interdepartmental Centre of Advanced Microscopy, University of Milan, Via Golgi 19, Milan 20133, Italy
References: Not available.
Gold nanoparticles capped by a GC-containing peptide functionalized with an RGD motif for integrin targeting
Gold nanoparticles were obtained by reduction of a tetrachloroaurate aqueous solution in the presence of a RGD-(GC)(2) peptide as stabilizer. As comparison, the behavior of the (GC)(2) peptide has been studied. The (GC)(2) and RGD-(GC)(2) peptides were prepared ad hoc by Fmoc synthesis. The colloidal systems have been characterized by UV-visible, TGA, ATR-FTIR, mono and bidimensional NMR techniques, confocal and transmission (TEM) microscopy, zeta-potential, and light scattering measurements. The efficient cellular uptake of Au-RGD-(GC)(2) and Au-(GC)(2) stabilized gold nanoparticles into U87 cells (human glioblastoma cells) were investigated by confocal microscopy and compared with the behavior of (GC)(2) capped gold nanoparticles. A quantitative determination of the nanoparticles taken up has been carried out by measuring the pixel brightness of the images, a measure that highlighted the importance of the RGD termination of the peptide. Insight in the cellular uptake mechanism was investigated by TEM microscopy. Various important evidences indicated the selective uptake of RGD-(GC)(2) gold nanoparticles into the nucleus.
Gold nanoparticles capped by a GC-containing peptide functionalized with an RGD motif for integrin targeting
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