Enzymatic profiling of cfDNA methylation for detection and monitoring of lung cancer
Agbarya, A.; Gilat, N.; Michaeli, Y.; Deek, J.; Grunwald, A.; Peled, M.; Artul, S.; Khoury, R.; Peled, M.; Ebenstein, Y.
Show abstract
We present a highly sensitive, low-cost approach for detecting lung cancer and monitoring response to therapy, based on sequencing-free detection of methylation biomarkers in cell-free DNA. An engineered methyltransferase is used to fluorescently label CpG sites. When applied to bisulfite-treated, PCR-amplified cell-free DNA, fluorescent reporters attach to all originally methylated sites, which can then be read on a standard hybridization microarray. In a proof-of-concept study involving 60 blinded participants, we distinguished cancer patients from healthy individuals with both sensitivity and specificity exceeding 90 %.
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