1. A novel two-photon fluorescent probe with long-wavelength emission for monitoring HClO in living cells and tissues.
- Author
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Gong, Yi-Jun, Lv, Meng-Ke, Zhang, Ming-Lu, Kong, Zhen-Zhen, and Mao, Guo-Jiang
- Subjects
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FLUORESCENT probes , *HYPOCHLORITES , *REACTIVE oxygen species , *ANTI-infective agents , *RHODAMINES , *RING formation (Chemistry) - Abstract
Abstract Hypochlorous acid (HClO), one of the most important reactive oxygen species (ROS), is a potent antimicrobial agent for the immune system against invasive bacteria and a wide range of pathogens. Therefore, it is critical to develop sensitive and selective methods for visualization of HClO in biological samples. In this work, a two-photon fluorescent probe HN2-TP) with long-wavelength emission (far-red: 630 nm) based on rhodamine analogue for bioimaging HClO was developed. Owing to a specific HClO induced cyclization reaction, the new probe shows large fluorescence enhancement (about 106-fold), good linear range with high sensitivity (detection limit: 40 nM), high selectivity and fast response when monitoring HClO in vitro. More importantly, by successfully imaging HClO in living cells and tissues, this kind of two-photon fluorescent probe with long-wavelength emission is expected for accurate sensing in complex biosystems, which could eliminate undesired autofluorescence and self-absorption. Graphical abstract A novel two-photon fluorescent probe with long-wavelength emission is developed for highly sensitive and selective monitoring HClO in living cells and tissues. fx1 Highlights • Hypochlorous acid (HClO) is a potent antimicrobial agent for the immune system. • A long-wavelength two-photon probe was developed for bioimaging HClO in vivo. • This two-photon probe may present new avenues for accurate sensing applications. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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