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Tecan Journal

Selected category: immunodiagnostics

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High speed immunodiagnostics with multicolor imaging

FantasiaBio, based in the Jinhua region of China’s Zhejiang province, understands the power of imaging live cells, and has created a range of fluorescence-based tools to exploit the power of multiplexed live cell imaging for clinical research and development. In 2020, the company developed an innovative in vitro assay to quantify neutralizing antibodies against SARS- CoV-2, allowing researchers to evaluate an individual’s level of protection after administration of a COVID-19 vaccine. Qin Xiao-Feng, Co-founder and Chief Scientific Officer at FantasiaBio, explained: “The kit uses a vesicular stomatitis virus (VSV) as a pseudotype vector with a green fluorescent protein (GFP) payload. If the COVID-19 vaccine stimulates effective production of neutralizing antibodies, the VSV pseudovirus is unable to infect human target cells, so the GFP gene is not expressed in these cells. The expression of GFP can normally be seen using a fluorescence microscope, and the number of green ‘dots’ is inversely proportional to the antibody activity. However, imaging in this way requires researchers to be sitting in front of a microscope for long periods of time to manually assess samples, which is time consuming, laborious and leads to inter-operator variability in results. We therefore needed a way to streamline and accelerate whole-well imaging for multiwell plates.”

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