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A glucose meter interface for point-of-care gene circuit-based diagnostics #MMPMID33526784
Amalfitano E; Karlikow M; Norouzi M; Jaenes K; Cicek S; Masum F; Sadat Mousavi P; Guo Y; Tang L; Sydor A; Ma D; Pearson JD; Trcka D; Pinette M; Ambagala A; Babiuk S; Pickering B; Wrana J; Bremner R; Mazzulli T; Sinton D; Brumell JH; Green AA; Pardee K
Nat Commun 2021[Feb]; 12 (1): 724 PMID33526784show ga
Recent advances in cell-free synthetic biology have given rise to gene circuit-based sensors with the potential to provide decentralized and low-cost molecular diagnostics. However, it remains a challenge to deliver this sensing capacity into the hands of users in a practical manner. Here, we leverage the glucose meter, one of the most widely available point-of-care sensing devices, to serve as a universal reader for these decentralized diagnostics. We describe a molecular translator that can convert the activation of conventional gene circuit-based sensors into a glucose output that can be read by off-the-shelf glucose meters. We show the development of new glucogenic reporter systems, multiplexed reporter outputs and detection of nucleic acid targets down to the low attomolar range. Using this glucose-meter interface, we demonstrate the detection of a small-molecule analyte; sample-to-result diagnostics for typhoid, paratyphoid A/B; and show the potential for pandemic response with nucleic acid sensors for SARS-CoV-2.