期刊
ANALYTICA CHIMICA ACTA
卷 1033, 期 -, 页码 193-198出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2018.05.071
关键词
beta-Galactosidase; Ratiometric; Self-immolative; High sensitivity; Real-time; Endogenous detection
资金
- National Key Technology Research and Development Program [2015BAK45B01]
Ratiometric fluorescent probes with a self-immolative spacer for beta-galactosidase (beta-gal) were developed. They function by beta-gal-cleaving the beta-galactoside bond of fluorescent substrates, followed by self-immolation to liberate the amino group of fluorophore. Thus, a remarkable variation in the photo-physical properties was observed and the corresponding ratiometric detection of beta-gal was realized. Our studies demonstrated that the GNPN exhibited high sensitivity for recognition of beta-gal, with a detection limit as low as 0.17 U L-1. GNPN can rapidly quantify beta-gal enzyme activity; the emission ratio F-545/F-475 for the GNPN reached maxima after approximately 4 min, which was one of the shortest response time ever reported. Furthermore, we demonstrated that these probes possess excellent biocompatibility and can be used to visualize the endogenous beta-gal in ovarian cancer cells. (C) 2018 Elsevier B.V. All rights reserved.
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