Confined DNA tetrahedral molecular sieve for size-selective electrochemiluminescence sensing.
Anal Chim Acta
; 1304: 342561, 2024 May 22.
Article
de En
| MEDLINE
| ID: mdl-38637057
ABSTRACT
Size selectivity is crucial in highly accurate preparation of biosensors. Herein, we described an innovative electrochemiluminescence (ECL) sensing platform based on the confined DNA tetrahedral molecular sieve (DTMS) for size-selective recognition of nucleic acids and small biological molecule. Firstly, DNA template (T) was encapsulated into the inner cavity of DNA tetrahedral scaffold (DTS) and hybridized with quencher (Fc) labeled probe DNA to prepare DTMS, accordingly inducing Ru(bpy)32+ and Fc closely proximate, resulting the sensor in a "signal-off" state. Afterwards, target molecules entered the cavity of DTMS to realize the size-selective molecular recognition while prohibiting large molecules outside of the DTMS, resulting the sensor in a "signal-on" state due to the release of Fc. The rigid framework structure of DTS and the anchor of DNA probe inside the DTS effectively avoided the nuclease degradation of DNA probe, and nonspecific protein adsorption, making the sensor possess potential application prospect for size-selective molecular recognition in diagnostic analysis with high accuracy and specificity.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Techniques de biocapteur
/
Mesures de luminescence
Langue:
En
Journal:
Anal Chim Acta
Année:
2024
Type de document:
Article