Abstract
Coelenterazine (CTZ) is the most general substrate for marine luciferases. The present protocol introduces a near-infrared (NIR ) bioluminescence (BL) imaging of mammalian cells with a cyanine-5 (Cy5) dye-conjugated CTZ . This unique Cy5-conjugated CTZ, named Cy5-CTZ , can act as a dual optical readout emitting both fluorescence (FL) and BL. The Cy5-CTZ exerts through-bond energy transfer (TBET)-based imaging modalities for mammalian cells. This novel derivative, Cy5-CTZ , is intrinsically fluorescent and emits NIR-shifted BL when reacting with an appropriate luciferase , such as Renilla luciferase (RLuc). The protocol exemplifies a unique live-cell imaging with Cy5-CTZ that is optically stable in physiological samples and rapidly permeabilize through plasma membrane and emit NIR-BL in live mammalian cells.
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Acknowledgments
This work was partly supported by JSPS KAKENHI Grants: Numbers 26288088, 15KK0029, 17H01215, 21H04948, and 24225001.
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Abe, M., Nishihara, R., Kim, SB., Suzuki, K. (2021). Near-Infrared Bioluminescence Imaging of Animal Cells with Through-Bond Energy Transfer Cassette. In: Kim, SB. (eds) Live Cell Imaging. Methods in Molecular Biology, vol 2274. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-1258-3_10
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DOI: https://doi.org/10.1007/978-1-0716-1258-3_10
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