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High performance genetically-encoded green fluorescent biosensors for intracellular L-lactate

Le, G. N. T.; Hario, S.; Takahashi-Yamashiro, K.; Li, S.; Drobizhev, M.; Nasu, Y.; Campbell, R. E.

2022-10-20 bioengineering
10.1101/2022.10.19.512892 bioRxiv
Show abstract

L-Lactate is a monocarboxylate produced during the process of cellular glycolysis and has long been generally considered a waste product. However, studies in recent decades have provided new perspectives on the physiological roles of L-lactate as a major energy substrate and a signaling molecule. To enable further investigations of the physiological roles of L-lactate, we have developed a series of high-performance ({Delta}F/F = 15 to 30 in vitro), intensiometric, genetically-encoded green fluorescent protein (GFP)-based intracellular L-lactate biosensors with a range of affinities. We evaluated the performance of these biosensors by in vitro and live-cell characterization and demonstrated the utility with imaging applications in several cell lines.

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