Multiplexed optical detection of plasma porphyrins using DNA aptamer-functionalized carbon nanotubes.
Anal Chem
; 85(17): 8391-6, 2013 Sep 03.
Article
em En
| MEDLINE
| ID: mdl-23899095
ABSTRACT
A novel optical platform based on DNA aptamer-functionalized SWCNTs (a-SWCNTs) is developed for multiplexed detection of plasma porphyrins. We have investigated the interactions of a-SWCNTs with heme (FePP), protoporphyrin (PP), coproporphyrin (CP), and uroporphyrin (UP). Two interaction mechanisms, specific binding, and nonspecific adsorption between porphyrins and a-SWCNTs are proposed based on observed optical signal modulations. The optical transduction signals are used to formulate a multiplexed detection strategy for the four porphyrin species without a laborious separation process. The detection scheme is sensitive, selective, and can readily be used for porphyrin detection in plasma samples when combined with a solvent extraction method. Our optical platform offers novel analytical tools for probing the surface chemistry at the porphyrin/a-SWCNTs interface, showing great promise for both research and clinical applications.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Porfirinas
/
Espectroscopia de Luz Próxima ao Infravermelho
/
Nanotubos de Carbono
/
Aptâmeros de Nucleotídeos
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Anal Chem
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Estados Unidos