NDLI: Development of a novel lysosome-targetable time-gated luminescence probe for ratiometric and luminescence lifetime detection of nitric oxide <i>in vivo</i>

Content Provider	Royal Society of Chemistry (RSC)
Author	Dai, Zhichao Yuan, Jingli Liu, Xiangli Tian, Lu Song, Bo
Copyright Year	2017
Abstract	Rapid, multiplexed, sensitive and specific identification and quantitative detection of nitric oxide (NO) are in great demand in biomedical science. Herein, a novel multifunctional probe based on the intramolecular LRET (luminescence resonance energy transfer) strategy, TRP-NO, was designed for the highly sensitive and selective ratiometric and luminescence lifetime detection of lysosomal NO. Before reaction with NO, the emission of the rhodamine moiety in TRP-NO is switched off, which prevents the LRET process, so that the probe emits only the long-lived Tb3+ luminescence. However, upon reaction with NO, accompanied by the turn-on of rhodamine emission, the LRET from the Tb3+-complex moiety to rhodamine moiety occurs, which results in a remarkable increase of the rhodamine emission and decrease of the Tb3+ emission. After the reaction, the intensity ratio of the rhodamine emission to the Tb3+ emission, I565/I540, was found to be 28.8-fold increased, and the dose-dependent enhancement of the I565/I540 value showed a good linearity upon the increase of NO concentration. In addition, a dose-dependent luminescence lifetime decrease was distinctly observed between the average luminescence lifetime of the probe and NO concentration, which provides a ∼10-fold contrast window for the detection of NO. These unique properties allowed TRP-NO to be conveniently used as a time-gated luminescence probe for the quantitative detection of NO using both luminescence intensity ratio and luminescence lifetime as signals. The applicability of TRP-NO for ratiometric time-gated luminescence imaging of NO in living cells was investigated. Meanwhile, dye co-localization studies confirmed a quite precise distribution of TRP-NO in lysosomes by confocal microscopy imaging. Furthermore, the practical applicability of TRP-NO was demonstrated by the visualization of NO in Daphnia magna. All of the results demonstrated that TRP-NO could serve as a useful tool for exploiting and elucidating the function of NO at sub-cellular levels with high specificity, accuracy and contrast.
Starting Page	1969
Ending Page	1976
Page Count	8
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	8
Issue Number	3
Journal	Chemical Science
DOI	10.1039/c6sc03667h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Multiplexing Förster resonance energy transfer Rhodamine Nitric oxide Luminescence Daphnia Staining Confocal microscopy Specific identification (inventories)
Content Type	Text
Resource Type	Article
Subject	Chemistry

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