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Spleen is a large immune organ in the body. Splenic operations such as splenectomy and intrasplenic injection are of paramount importance for immunological research and splenic diseases. Fluorescence imaging can vastly simplify these operations, but a specific spleen-targeting probe is still unavailable. Herein, the first specific spleen-accumulated fluorescent probe, VIX-S is reported, which fluoresces at 1064 nm and is highly stable. Systematic studies reveal the superior targeting and imaging performance of VIX-S for the spleen in both nude and haired mice. In vivo imaging indicates that the probe can image the morphology of spleen with a signal-background ratio of at least two-fold higher than that of the liver. Moreover, the application of VIX-S in imaging-guided splenic operation, including splenic injury and intrasplenic injection, is demonstrated, which may provide a practice tool for spleen research in the animal model. © 2023 Wiley-VCH GmbH.


Yiqing Yang, Diankai Liu, Zixu He, Xiaofan Zhang, Huihui Liu, Xiaohua Li, Huimin Ma, Wen Shi. Specific Spleen-Accumulated NIR-II Fluorescent Probe for Imaging-Guided Splenic Operation. Advanced healthcare materials. 2023 Aug;12(20):e2300434

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PMID: 36975845

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