Compact zwitterion-coated iron oxide nanoparticles for biological applications.
Nano Lett
; 12(1): 22-5, 2012 Jan 11.
Article
em En
| MEDLINE
| ID: mdl-22185195
ABSTRACT
The potential of superparamagnetic iron oxide nanoparticles (SPIONs) in various biomedical applications, including magnetic resonance imaging (MRI), sensing, and drug delivery, requires that their surface be derivatized to be hydrophilic and biocompatible. We report here the design and synthesis of a compact and water-soluble zwitterionic dopamine sulfonate (ZDS) ligand with strong binding affinity to SPIONs. After ligand exchange, the ZDS-coated SPIONs exhibit small hydrodynamic diameters, and stability with respect to time, pH, and salinity. Furthermore, small ZDS coated SPIONs were found to have a reduced nonspecific affinity (compared to negatively charged SPIONs) toward serum proteins; streptavidin/dye functionalized SPIONs were bioactive and thus specifically targeted biotin receptors.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas Sanguíneas
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Dopamina
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Dextranos
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Alcanossulfonatos
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Materiais Revestidos Biocompatíveis
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Nanoestruturas
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Nanopartículas de Magnetita
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article