Journal
ANALYTICAL CHEMISTRY
Volume 90, Issue 14, Pages 8290-8294Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.8b02062
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Funding
- National Aeronautics and Space Administration Astrobiology Institute Cooperative Agreement Notice (NASA NAI CAN) [NNX15AF46G]
- Welch [F-1654]
- John Templeton Foundation [54466]
- John Templeton Foundation
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Loop-mediated isothermal amplification (LAMP) is an extremely powerful tool for the detection of nucleic acids with high sensitivity and specificity. However, LAMP shows optimal performance at around 65 degrees C, which limits applications in point-of-care-testing (POCT). Here, we have developed a version of LAMP that uses phosphorothioated primers (PS-LAMP) to enable more efficient hairpin formation and extension at the termini of growing concatamers, and that therefore works at much lower temperatures. By including additional factors such as chaotropes (urea) and single-stranded DNA binding protein (SSB), the sensitivities and selectivities for amplicon detection with PS-LAMP at 40 degrees C were comparable with a regular LAMP reaction at 65 degrees C.
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