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cybLuc: An Effective Aminoluciferin Derivative for Deep Bioluminescence Imaging
Wenxiao Wu1, Jing Su2,3, Chunchao Tang1
1Department of Medicinal Chemistry, Key Laboratory of Chemical Biology, School of Pharmacy, Shandong University , Jinan, Shandong 250012, China.
Analytical Chemistry
|April 6, 2017
Summary
New N-cycloalkylaminoluciferins (cyaLucs) significantly boost firefly luciferase (Fluc) bioluminescence. N-cyclobutylaminoluciferin (cybLuc) shows superior signal intensity and deep tissue penetration for enhanced in vivo imaging.
Area of Science:
- Biochemistry
- Molecular Biology
- Biotechnology
Background:
- Firefly luciferase/luciferin bioluminescence imaging is crucial for biological research.
- Existing substrates like d-luciferin have limitations in signal intensity and penetration depth.
Purpose of the Study:
- To develop novel luciferin analogs with enhanced bioluminescent properties.
- To improve the efficiency and sensitivity of firefly luciferase imaging.
Main Methods:
- Synthesis of N-cycloalkylaminoluciferins (cyaLucs) with lipophilic substitutions.
- In vitro, in cellulo, and in vivo bioluminescence assays.
- Cocrystal structure analysis of firefly luciferase with oxidized N-cyclobutylaminoluciferin (cybLuc).
Main Results:
- cyaLucs serve as effective substrates for native firefly luciferase (Fluc).
- N-cyclobutylaminoluciferin (cybLuc) produced significantly higher bioluminescent signals compared to d-luciferin and aminoluciferin.
- cybLuc demonstrated potential for longer in vivo imaging and enhanced sensitivity in deep tissue imaging, including brain tumors.
Conclusions:
- N-cycloalkylaminoluciferins represent a promising class of substrates for advanced bioluminescence imaging.
- cybLuc offers a more sensitive and efficient alternative for in vivo applications, particularly for deep tissue and long-term imaging.