DNAzyme-functionalized porous carbon nanospheres serve as a fluorescent nanoprobe for imaging detection of microRNA-21 and zinc ion in living cells
- 27 March 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Microchimica Acta
- Vol. 187 (4), 1-9
- https://doi.org/10.1007/s00604-020-04226-6
Abstract
The present study shows that a dual-signal nanoprobe consisting of DNAzyme-functionalized porous carbon nanospheres (PCNs) responds to microRNA-21 and zinc ion (Zn2+). The fluorescent probe undergoes an increase in the fluorescence intensity of fluorescein isothiocyanate (FITC) (with excitation/emission wavelengths at 488/517 nm) and the fluorescence intensity of cyanine-5 (Cy5) (with excitation/emission wavelengths at 633/670 nm) in the presence of microRNA-21 and Zn2+. The recognition between microRNA-21 and its complementary strand in the PCNs induces the separation of Zn2+-specific DNAzyme from PCNs, thus resulting in the increase of green fluorescence, and the exogenous Zn2+ triggers the rupture of cleavage strand of DNAzyme and recovery of red fluorescence. This nanoprobe allows us to acquire in vitro the determination of microRNA-21 in the range of 2–300 nM with a detection limit of 0.57 nM and the determination of Zn2+ in the range 2–100 nM with a detection limit of 0.43 nM, and in situ simultaneous imaging in MCF-7 breast cancer cells. Therefore, this strategy permits to obtain the expression levels of different biomarkers in living cells, providing a useful tool for diagnosis of cancers and understanding their biological process. Schematic representation of the DNAzyme-functionalized porous carbon nanospheres for the imaging analysis of microRNA-21 and Zn2+ in living cells.Funding Information
- the Project Fund for Shangdong Key R&D Program (2017GGX20121)
This publication has 41 references indexed in Scilit:
- DNA-Coated Gold Nanoparticles for the Detection of mRNA in Live Hydra Vulgaris AnimalsACS Applied Materials & Interfaces, 2018
- Adenosine Triphosphate Bioluminescence-Based Bacteria Detection Using Targeted Photothermal Lysis by Gold NanorodsAnalytical Chemistry, 2018
- Gold Nanobipyramids as Dual-Functional Substrates for in Situ “Turn On” Analyzing Intracellular Telomerase Activity Based on Target-Triggered Plasmon-Enhanced FluorescenceACS Applied Materials & Interfaces, 2018
- Application of semiconductor quantum dots in bioimaging and biosensingJournal of Materials Chemistry B, 2017
- Nanodiamonds and silicon quantum dots: ultrastable and biocompatible luminescent nanoprobes for long-term bioimagingChemical Society Reviews, 2015
- An overview of nanoparticles commonly used in fluorescent bioimagingChemical Society Reviews, 2015
- Fluorescent Gold Nanoclusters: Recent Advances in Sensing and ImagingAnalytical Chemistry, 2014
- Gold: a versatile tool for in vivo imagingJournal of Materials Chemistry B, 2012
- Enrichment and Detection of Rare Proteins with Aptamer-Conjugated Gold NanorodsAnalytical Chemistry, 2012
- DNA-Functionalized Monolithic Hydrogels and Gold Nanoparticles for Colorimetric DNA DetectionACS Applied Materials & Interfaces, 2010