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CC BY V4.0, Open Access
Journal article
Zeptomole Imaging of Cytosolic MicroRNA Cancer Biomarkers with A Light-Controlled Nanoantenna
Nano-micro letters, Vol.13(1), 213
12/01/2021
PMID: 34674052
Abstract
Highlights
Based on førster resonance energy transfer, the nanoantenna containing over 4000 donor dyes can achieve unprecedented signal amplification and biosensing sensitivity.
With light irradiation, the light-harvesting nanoantenna effectively disrupted lysosomal structures by generation of reactive oxygen species, substantially achieved cytosol delivery.
The zeptomolar sensitivity of nanoantenna provides accurate bioimaging of miR-210 in multiple cell lines and in vivo assay, which creates a pathway for the creation of miRNA toolbox for quantitative epigenetics and personalized medicine.
Detecting and quantifying intracellular microRNAs (miRNAs) are a critical step in resolving a cancer diagnostic and resolving the ensemble of gene products that orchestrate the living state of cells. However, the nanoprobe for detecting low abundance miRNAs in cell cytosol is restricted by either the “one-to-one” signal-trigger model or difficulty for cytosol delivery. To address these challenges, we designed a light-harvesting nanoantenna-based nanoprobe, which directs excitation energy to a single molecule to sensitively detect cytosolic miRNA. With light irradiation, the light-harvesting nanoantenna effectively disrupted lysosomal structures by generation of reactive oxygen species, substantially achieved cytosol delivery. The nanoantenna containing > 4000 donor dyes can efficiently transfer excitation energy to one or two acceptors with 99% efficiency, leading to unprecedented signal amplification and biosensing sensitivity. The designed nanoantenna can quantify cytosolic miR-210 at zeptomolar level. The fluorescence lifetime of the donor exhibited good relationship with miR-210 concentration in the range of 0.032 to 2.97 amol/ngRNA. The zeptomole sensitivity of nanoantenna provides accurate bioimaging of miR-210 both in multiple cell lines and in vivo assay, which creates a pathway for the creation of miRNA toolbox for quantitative epigenetics and personalized medicine.
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Details
- Title
- Zeptomole Imaging of Cytosolic MicroRNA Cancer Biomarkers with A Light-Controlled Nanoantenna
- Creators
- Yang Song - Washington State UniversityXiaoli Cai - Washington State UniversityGrayson Ostermeyer - Washington State UniversityShichao Ding - Washington State UniversityDan Du - Washington State UniversityYuehe Lin - Washington State University
- Publication Details
- Nano-micro letters, Vol.13(1), 213
- Academic Unit
- School of Mechanical and Materials Engineering
- Publisher
- Springer Nature Singapore
- Identifiers
- 99901227845401842
- Language
- English
- Resource Type
- Journal article