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• W2897587918 abstract "DNA methyltransferase (MTase) aberrant expression has a close relationship to tumorigenesis. DNA MTase activity detection is of great importance to its biomedical research and theranostics study. Here, multiple sealed primers-mediated rolling circle amplification (RCA) strategy is developed for sensitively and specifically detecting DNA MTase activity. The DNA probe has a folded, double-loop structure that seals multiple primers. First, in the presence of DNA MTase, the DNA probe is methylated, which then gets cleaved by the restriction endonuclease and breaks into multiple DNA oligonucleotide fragments. Second, each DNA oligonucleotide fragment acts as an independent primer for triggering RCA reaction respectively, producing long DNA strands that contain several interval G-quadruplexes. Finally, copious of G-quadruplexes are obtained, which bind N-methylmesoporphyrin IX (NMM) to generate significantly enhanced fluorescence. When DNA MTase is absent or inactive, the DNA probe is stable and cannot release the primers for RCA reaction. In the proposed strategy, the action of DNA MTase on one DNA probe is converted to the multiple amplifications triggered by multiple released primers. The detection limit for Dam MTase is down to 0.0085 U/mL, and the target MTase can be well discriminated from its MTases analogues. The method is utilized in screening of Dam MTase inhibitors and analyzing of spiked Dam MTase in biological samples. The results suggest that the strategy may provide a promising tool for DNA MTase activity detection in biomedical research and cancer theranostics." @default.
• W2897587918 created "2018-10-26" @default.
• W2897587918 creator A5003696883 @default.
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• W2897587918 date "2019-03-01" @default.
• W2897587918 modified "2023-10-16" @default.
• W2897587918 title "Multiple sealed primers-mediated rolling circle amplification strategy for sensitive and specific detection of DNA methyltransferase activity" @default.
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• W2897587918 doi "https://doi.org/10.1016/j.talanta.2018.09.113" @default.
• W2897587918 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30609532" @default.
• W2897587918 hasPublicationYear "2019" @default.
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