Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 15, Issue 20, Pages 4383-4389Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ob00781g
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Funding
- National Natural Science Foundation of China [21527810, 21575036, 21521063]
- National Key Basic Research Program [2017CB911000]
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Sensitive and selective detection and imaging of nitroreductase (NTR) in cancer cells is of great importance for better understanding their biological functions. Since there are a few fluorescent probes concerning NTR activity specifically located in mitochondria, we developed a novel fluorescent benzo-indocyanine probe (BICP) for mitochondrial NTR activity monitoring and imaging via extending a benzo-indole moiety into a benzoindocyanine based fluorophore (BICF) with a strong intramolecular charge transfer (ICT) effect and incorporating 4-nitrobenzyl as a fluorescence-quenching and enzyme-responsive moiety. Live cell imaging of HeLa and A549 demonstrates that the developed BICP is able to realize sensitive and selective mitochondrial NTR activity probing with high-contrast off-on fluorescence. These findings implied the great potential of the developed probe for monitoring mitochondrial-specific NTR activities in living cells and related applications in cell biology.
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