Size-Dependent Plasmonic Resonance Scattering Characteristics of Gold Nanorods for Highly Sensitive Detection of microRNA-27a.
ACS Appl Bio Mater
; 4(4): 3469-3475, 2021 04 19.
Article
en En
| MEDLINE
| ID: mdl-35014431
ABSTRACT
MicroRNAs, as one kind of significant biomarkers, play indispensable roles in the diagnosis and treatment of cancers. Yet, owing to low expression and high sequence homology, high sensitivity and specificity for microRNA detection are greatly challenging. Herein, a sensitive sensing platform with high specificity was developed for microRNA-27a (miRNA-27a) based on the miRNA-27a-triggered chemical etching of gold nanorods to a smaller size, which was accompanied by a significant blue shift and a large decrease of intensity in the localized surface plasmon resonance (LSPR) scattering and remarkable color variability from red to green. When combined with strand displacement reactions as well as liposome signal amplification and transduction, the proposed bioassay presented high selectivity toward miRNA-27a in a dynamic range from 100 fM to 3 pM and a low limit of detection of 16.5 fM (3σ/k) by dark-field microscopy. Additionally, the remarkable discrimination of single nucleotide difference suggested superior selectivity and was able to detect miRNA-27a extracted from breast cancer cells. The strategy put forward is universal, presenting amusing application prospects in the early diagnosis of various cancers by adapting the corresponding nucleotide sequences.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Materiales Biocompatibles
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Neoplasias de la Mama
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Resonancia por Plasmón de Superficie
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MicroARNs
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Nanotubos
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Oro
Tipo de estudio:
Diagnostic_studies
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Screening_studies
Límite:
Humans
Idioma:
En
Revista:
ACS Appl Bio Mater
Año:
2021
Tipo del documento:
Article