Dr. X. James Li Profile

Dr. X. James Li

CEO at Cellex Inc

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Proceedings Article | 13 May 2015 Paper

A homogeneous biochemiluminescent assay for detection of influenza

Kwok Min Hui, Xiao Jing Li, Lu Pan, X. Li

Proceedings Volume 9490, 94900N (2015) https://doi.org/10.1117/12.2183395

KEYWORDS: Viruses, Signal detection, Point-of-care devices, Optical testing, Proteins, Temperature metrology, Lithium, Genetics, Signal to noise ratio, Lutetium

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Current methods of rapid detection of influenza are based on detection of the nucleic acids or antigens of influenza viruses. Since influenza viruses constantly mutate leading to appearance of new strains or variants of viruses, these detection methods are susceptible to genetic changes in influenza viruses. Type A and B influenza viruses contain neuraminidase, an essential enzyme for virus replication which enables progeny influenza viruses leave the host cells to infect new cells. Here we describe an assay method, the homogeneous biochemiluminescent assay (HBA), for rapid detection of influenza by detecting viral neuraminidase activity. The assay mimics the light production process of a firefly: a viral neuraminidase specific substrate containing a luciferin moiety is cleaved in the presence of influenza virus to release luciferin, which becomes a substrate to firefly luciferase in a light production system. All reagents can be formulated in a single reaction mix so that the assay involves only one manual step, i.e., sample addition. Presence of Type A or B influenza virus in the sample leads to production of strong, stable and easily detectable light signal, which lasts for hours. Thus, this influenza virus assay is suitable for use in point-of-care settings.

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