(Image: Ryo Nishihara)

Researchers have developed a potential COVID-19 test inspired by bioluminescence. Using a molecule found in crustaceans, they have created a rapid approach that detects SARS-CoV-2 protein comparably to one used in vaccine research.

Previous research suggests that IPT luciferins could serve as the basis for a new type of medical test that uses luminescence to announce the presence of a target protein in a specimen. The team suspected that an IPT luciferin could react with the SARS-CoV-2 spike protein, which allows the virus particles to invade cells and cause COVID-19 — and open the door to develop a glowing test.

The team first investigated 36 different IPT luciferins’ abilities to react with a single unit of spike protein. Only one molecule, which came from tiny crustaceans from the genus Cypridina, emitted light. They found that, over the course of 10 minutes, an adequate amount of light could be detected. A commercially available luminescence reading device was required; the light could not be seen by the naked eye.

Finally, they found that the luciferin could detect the amount of the spike protein in saliva with the same accuracy as a technique currently used in vaccine development. However, the luciferin system delivered results in one minute — significantly faster than the current rapid point-of-care tests.

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