Journal
CHEMICAL SCIENCE
Volume 10, Issue 4, Pages 1219-1226Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8sc04363a
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Funding
- NSFC [81773674, 81573383, 21390402]
- NSFHP [2017CFA024, 2017CFB711, 2016ACA126]
- NSFJP [BK20160387]
- Shenzhen Science and Technology Research Grant [JCYJ20170303170809222]
- Fundamental Research Funds for the Central Universities
- Open Research Fund Program of the Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals
- ABRPSTCS [SYG201521]
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Near-infrared II fluorescence imaging holds great promise for in vivo imaging and imaging-guided surgery with deep penetration and high spatiotemporal resolution. However, most NIR-II aromatic luminophores suffer from the notorious aggregation-caused quenching (ACQ) effect in the aqueous solution, which largely hinders their biomedical application in vivo. In this study, the first NIR-II organic aggregation-induced emission (AIE) fluorophore (HLZ-BTED), encapsulated as nanoparticles (HLZ-BTED dots) for in vivo biomedical imaging, was designed and synthesized. The NIR-II AIE HLZ-BTED dots showed high temporal resolution, high photostability, outstanding water-solubility and biocompatibility in vitro and in vivo. The HLZ-BTED dots were further used for long-term breast tumor imaging and visualizing tumor-feeding blood vessels, long-term hind limb vasculature and incomplete hind limb ischemia. More importantly, as a proof-of-concept, this is the first time that non-invasive and real-time NIR-II imaging of the gastrointestinal tract in health and disease has been performed, making the AIE dots a promising tool for gastrointestinal (GI) tract research, such as understanding the healthy status of GI peristalsis, diagnosing and evaluating intestinal motility dysfunction, and assessing drug effects on intestinal obstruction.
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