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• W2912809523 abstract "Kupffer cells (KCs), potent scavenger cells located in hepatic sinusoids, constantly phagocytize and degrade foreign materials to maintain metabolism and clearance. Understanding the strategic KC arrangement which links to their spatial location and function in hepatic lobules, the basic functional unit in the liver, is highly valuable for characterizing liver function. However, selectively labeling KCs and characterizing their function in vivo remains challenging. Herein, a fast self-assembled pomegranate structure-like nanoparticle with “nanopomegranate seeds” of dye aggregates has been developed, which has dual-modality “off/on” capability. This nanopomegranate shows good photostability, a high extinction coefficient, a high KC labeling efficiency (98.8%), and better visualization of KC morphology than commercial FluoSpheres. In vivo photoacoustic (PA) and fluorescence imaging consistently visualize that KCs are strategically distributed along the central vein (CV)–portal triad (PT) axis in each liver lobule: more and larger KCs exist in areas closer to the PTs. The high-resolution PA quantitative data further revealed that the density of KCs was linearly dependent on the rn/rmax ratio (their relative location along the CV–PT axis) (R2 = 0.7513), and the KC density at the outermost layer is almost 246-fold that at the innermost layer (each layer is 8 μm). Notably, the phagocytic ability of KCs located in layers with rn/rmax ratios of 0.167–0.3 varies in a zigzag pattern, as evidenced by their different PA intensities. Additionally, the fluorescence imaging quantitation suggests similar fluorescence activation of nanopomegranate in KCs. Nanopomegranates combined with dual-modality imaging reveal the strategic arrangement of KCs in vivo, greatly extending our understanding of liver physiology." @default.
• W2912809523 created "2019-02-21" @default.
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• W2912809523 date "2019-02-13" @default.
• W2912809523 modified "2023-10-01" @default.
• W2912809523 title "Self-Assembled “Off/On” Nanopomegranate for <i>In Vivo</i> Photoacoustic and Fluorescence Imaging: Strategic Arrangement of Kupffer Cells in Mouse Hepatic Lobules" @default.
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• W2912809523 doi "https://doi.org/10.1021/acsnano.8b07283" @default.
• W2912809523 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30716272" @default.
• W2912809523 hasPublicationYear "2019" @default.
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