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Super-resolution Geometric Barcoding for Multiplexed miRNA Profiling
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DOI：10.1002/anie.201807956.png)
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Abstract
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MicroRNA (miRNA) expression profiles hold promise as biomarkers for diagnostics and prognosis of complex diseases. Herein, we report a super-resolution fluorescence imaging-based digital profiling method for specific, sensitive, and multiplexed detection of miRNAs. In particular, we applied the DNA-PAINT (point accumulation for imaging in nanoscale topography) method to implement a super-resolution geometric barcoding scheme for multiplexed single-molecule miRNA capture and digital counting. Using synthetic DNA nanostructures as a programmable miRNA capture nano-array, we demonstrated high-specificity (single nucleotide mismatch discrimination), multiplexed (8-plex, 2 panels), and sensitive measurements on synthetic miRNA samples, as well as applied one 8-plex panel to measure endogenous miRNAs levels in total RNA extract from HeLa cells.
Keywords:
DNA nanotechnology
DNA-PAINT
microRNA
multiplexing
super-resolution imaging
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