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- W4380053041 abstract "Micro RNAs (miRNAs) are 19–23 nucleotides-long non-coding RNA which have been identified as important biomarkers for many diseases, including cancers. Here, we report an ultrasensitive, highly specific, label-free, and without nucleic acid amplification (NAA) detection of miRNAs using paper-based single-walled carbon nanotubes (SWNTs) field-effect transistor (FET) biosensors. The strategy involved a two-step protocol starting with direct hybridization of the target miRNA with a specific RNA probe immobilized on SWNTs networks deposited on the paper substrate to generate the first response, followed by the recognition of the resulting RNA/miRNA duplexes with the Carnation Italian ringspot virus p19 protein (p19) in a size-dependent manner, giving the second electrical response that magnified the biosensor sensitivity. As a demonstration, we detected the miRNA-122a, a promising biomarker for the diagnosis of early-stage hepatocellular carcinoma (HCC) in various sample matrices, including phosphate buffers, human serum, and synthetic saliva. We achieved the lowest detection of 0.1 aM and a wide dynamic range of 0.1 aM–1 fM, that demonstrated its potential for rapid, facile, low-cost, and point-of-care detection of miRNAs for early cancer diagnosis." @default.
- W4380053041 created "2023-06-10" @default.
- W4380053041 creator A5037726491 @default.
- W4380053041 creator A5088015370 @default.
- W4380053041 date "2023-09-01" @default.
- W4380053041 modified "2023-10-14" @default.
- W4380053041 title "Affordable paper-based SWNTs field-effect transistor biosensors for nucleic acid amplification-free and label-free detection of micro RNAs" @default.
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- W4380053041 doi "https://doi.org/10.1016/j.biosx.2023.100364" @default.
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