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- W3012568104 abstract "Herein, a novel, rapid, highly sensitive, and selective fluorescent biosensor is presented, which is designed based on “sandwich-type” hybridization of oligonucleotides and the fluorescence resonance energy transfer (FRET) strategy. It senses and determines the MicroRNA-155 (miRNA-155) expression levels as a cancer biomarker. In this study, a modified La(III)-metal–organic framework(MOF) and silver nanoparticles (Ag NPs) were used as the energy donor–acceptor pairs in fluorescence quenching through the FRET process. La(III)-MOF was synthesized and then modified by glutaraldehyde as a cross-linking agent. The Ag NPs were also prepared, and then, the surface of both was conjugated with different 5′-amino-labeled ssDNA strands (aptamers). These prepared nanoprobes were characterized by various physicochemical techniques such as X-ray diffraction, energy-dispersive X-ray spectrometry, Fourier transform infrared, field emission scanning electron microscopy, UV–vis spectroscopy, elemental mapping, and gel electrophoresis. To optimize the detection conditions, several factors affecting biosensor performance were assessed by one variable-at-a-time and central composite design methods. Under optimum conditions, this “turn-off” fluorescent biosensor could detect and determine as low as 0.04 ppb (ng. mL–1) or 5.5 fM of the miRNA-155 biomarker. Therefore, this biosensor provides highly promising potential for lung and breast cancer diagnosis." @default.
- W3012568104 created "2020-03-27" @default.
- W3012568104 creator A5053448244 @default.
- W3012568104 creator A5061798029 @default.
- W3012568104 date "2020-03-24" @default.
- W3012568104 modified "2023-10-16" @default.
- W3012568104 title "Ultrasensitive Fluorescent miRNA Biosensor Based on a “Sandwich” Oligonucleotide Hybridization and Fluorescence Resonance Energy Transfer Process Using an Ln(III)-MOF and Ag Nanoparticles for Early Cancer Diagnosis: Application of Central Composite Design" @default.
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- W3012568104 doi "https://doi.org/10.1021/acsami.0c00891" @default.
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