Organic Nanoprobe Cocktails for Multilocal and Multicolor Fluorescence Imaging of Reactive Oxygen Species
Date of Issue2017
School of Chemical and Biomedical Engineering
Hypochlorite (ClO−) as a highly reactive oxygen species not only acts as a powerful “guarder” in innate host defense but also regulates inflammation-related pathological conditions. Despite the availability of fluorescence probes for detection of ClO− in cells, most of them can only detect ClO− in single cellular organelle, limiting the capability to fully elucidate the synergistic effect of different organelles on the generation of ClO−. This study proposes a nanoprobe cocktail approach for multicolor and multiorganelle imaging of ClO− in cells. Two semiconducting oligomers with different π-conjugation length are synthesized, both of which contain phenothiazine to specifically react with ClO− but show different fluorescent color responses. These sensing components are self-assembled into the nanoprobes with the ability to target cellular lysosome and mitochondria, respectively. The mixture of these nanoprobes forms a nano-cocktail that allows for simultaneous imaging of elevated level of ClO− in lysosome and mitochondria according to fluorescence color variations under selective excitation of each nanoprobe. Thus, this study provides a general concept to design probe cocktails for multilocal and multicolor imaging.
Advanced Functional Materials
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the author created version of a work that has been peer reviewed and accepted for publication by Advanced Functional Materials, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1002/adfm.201700493].