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suck abstract from ncbi


10.1021/acsnano.0c06375

http://scihub22266oqcxt.onion/10.1021/acsnano.0c06375
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32930583!7510349!32930583
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suck abstract from ncbi

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  • Quantification of mRNA Expression Using Single-Molecule Nanopore Sensing #MMPMID32930583
  • Rozevsky Y; Gilboa T; van Kooten XF; Kobelt D; Huttner D; Stein U; Meller A
  • ACS Nano 2020[Oct]; 14 (10): 13964-13974 PMID32930583show ga
  • RNA quantification methods are broadly used in life science research and in clinical diagnostics. Currently, real-time reverse transcription polymerase chain reaction (RT-qPCR) is the most common analytical tool for RNA quantification. However, in cases of rare transcripts or inhibiting contaminants in the sample, an extensive amplification could bias the copy number estimation, leading to quantification errors and false diagnosis. Single-molecule techniques may bypass amplification but commonly rely on fluorescence detection and probe hybridization, which introduces noise and limits multiplexing. Here, we introduce reverse transcription quantitative nanopore sensing (RT-qNP), an RNA quantification method that involves synthesis and single-molecule detection of gene-specific cDNAs without the need for purification or amplification. RT-qNP allows us to accurately quantify the relative expression of metastasis-associated genes MACC1 and S100A4 in nonmetastasizing and metastasizing human cell lines, even at levels for which RT-qPCR quantification produces uncertain results. We further demonstrate the versatility of the method by adapting it to quantify severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA against a human reference gene. This internal reference circumvents the need for producing a calibration curve for each measurement, an imminent requirement in RT-qPCR experiments. In summary, we describe a general method to process complicated biological samples with minimal losses, adequate for direct nanopore sensing. Thus, harnessing the sensitivity of label-free single-molecule counting, RT-qNP can potentially detect minute expression levels of RNA biomarkers or viral infection in the early stages of disease and provide accurate amplification-free quantification.
  • |*Nanopores[MESH]
  • |Betacoronavirus/genetics[MESH]
  • |Biosensing Techniques/*methods/standards[MESH]
  • |HCT116 Cells[MESH]
  • |Humans[MESH]
  • |RNA, Messenger/*analysis/genetics/metabolism[MESH]
  • |RNA, Viral/genetics/metabolism[MESH]
  • |S100 Calcium-Binding Protein A4/genetics/metabolism[MESH]
  • |SARS-CoV-2[MESH]
  • |Single Molecule Imaging/*methods/standards[MESH]
  • |Trans-Activators/genetics/metabolism[MESH]


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  • suck abstract from ncbi

    13964 10.14 2020