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389 results on '"Lakhotia S"'

2. Response

Author

Lakhotia, S. C., Patwardhan, Kishor, and Rastogi, Sanjeev

Published
2019

11. Response

Author

Lakhotia, S. C.

Published
2009

24. In this issue

Author

Rangarajan, P. N. and Lakhotia, S. C.

Published
1999

26. In this issue

Author

Lakhotia, S. C., Sopory, S. K., and Joshi, N. V.

Published
1998

29. High-surety isothermal amplification and detection of SARS-CoV-2, including with crude enzymes

Author

Andrew D. Ellington, Sanchita Bhadra, Lakhotia S, Tran Nd, and Timothy E. Riedel

Subjects
chemistry.chemical_classification, Chemistry, Oligonucleotide, fungi, Loop-mediated isothermal amplification, Computational biology, Amplicon, law.invention, Enzyme, law, Nucleic Acid Amplification Tests, Multiplex, Primer (molecular biology), Polymerase chain reaction
Abstract

Isothermal nucleic acid amplification tests (iNAT), such as loop-mediated isothermal amplification (LAMP), are good alternatives to polymerase chain reaction (PCR)-based amplification assays, especially for point-of-care and low resource use, in part because they can be carried out with relatively simple instrumentation. However, iNATs can generate spurious amplicons, especially in the absence of target sequences, resulting in false positive results. This is especially true if signals are based on non-sequence-specific probes, such as intercalating dyes or pH changes. In addition, pathogens often prove to be moving, evolving targets, and can accumulate mutations that will lead to inefficient primer binding and thus false negative results. Internally redundant assays targeting different regions of the target sequence can help to reduce such false negatives. Here we describe rapid conversion of three previously described SARS-CoV-2 LAMP assays that relied on non-sequence-specific readout into assays that can be visually read using sequence-specific fluorogenic oligonucleotide strand exchange (OSD) probes. We evaluate one-pot operation of both individual and multiplex LAMP-OSD assays and demonstrate detection of SARS-CoV-2 virions in crude human saliva.

Published
2020

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