title: Aptamer-conjugated nanoparticles: preservation of targeting functionality demonstrated by microchip electrophoresis in frontal mode.
abstract: Aptamer-conjugated nanoparticles (Apt-NPs) are increasingly being developed for biomedical purposes and especially for diagnosis and therapy. However, there is no quantitative study of the targeting functionality of such grafted aptamers compared with free aptamers. Thus, we report the first determination of binding parameters for Apt-NP/target complexes, thanks to a continuous frontal analysis in a microchip electrophoresis format (named FACMCE), based on a methodology previously developed by our group. As a model system, the targeting ability of a lysozyme-binding aptamer conjugated to fluorescent maghemite nanoparticles was evaluated and showed evidence that the conjugation does not alter the affinity of this aptamer.
authors: Laboratoire Physicochimie des Electrolytes, Colloïdes et Sciences Analytiques (PECSA, UMR CNRS 7195), ENSCP-Chimie ParisTech, Paris, France.
authors: Marie
authors: M
authors: Girardot
authors: Fanny
authors: F
authors: d'Orlyé
authors: Stéphanie
authors: S
authors: Descroix
authors: Anne
authors: A
authors: Varenne
mesh_terms: D052157:Aptamers, Nucleotide / Q000737:chemistry*; D001483:Base Sequence; D001665:Binding Sites; D046209:Electrophoresis, Microchip; D005290:Ferric Compounds / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*
chemical_list: D052157:Aptamers, Nucleotide; D005290:Ferric Compounds; C000499:ferric oxide