Impedimetric nanostructured genosensor for detection of schistosomiasis in cerebrospinal fluid and serum samples.
J Pharm Biomed Anal
; 137: 163-169, 2017 Apr 15.
Article
de En
| MEDLINE
| ID: mdl-28131054
ABSTRACT
Schistosomiasis is a neglected disease closely related to the low levels of social development and a serious public health problem. In this work, we performed an electrochemical detection of Schistosoma mansoni DNA with a self-assembled monolayer of mercaptobenzoic acid (MBA) immobilizing nanostructures composed of gold nanoparticles (AuNPs) and magnetite nanoparticles (Fe3O4_NPs). Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to monitor the hybridization process. MBA-Fe3O4_NPs-AuNPs-DNAprobe system reveals an effective electrochemical response indicating the surface modification. The proposed biosystem was capable to recognize specific nucleotide sequence of S. mansoni present in cerebrospinal fluid (CFS) and serum samples at different genome DNA concentrations. The biorecognition resulted in an increase in the electron transfer resistance and a decrease of the current peaks at higher DNA concentrations during electrochemical measurements. The developed platform showed a DNA detection limit of 0.781 and 0.685pgµL-1 for serum and CFS, respectively. Therefore, the obtained biosensor can be considered as a useful tool for specific detection of S. mansoni at low concentrations in various biological fluids.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Schistosoma mansoni
/
Schistosomiase
/
ADN des helminthes
/
Nanoparticules métalliques
/
Nanoparticules de magnétite
Type d'étude:
Diagnostic_studies
Limites:
Animals
/
Humans
Langue:
En
Journal:
J Pharm Biomed Anal
Année:
2017
Type de document:
Article
Pays d'affiliation:
Brésil