A self-referenced nanodosimeter for reaction based ratiometric imaging of hypochlorous acid in living cells

A self-referenced nanodosimeter for reaction based ratiometric imaging of hypochlorous acid in living cells
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用于活细胞中次氯酸基于反应的比例成像的自参考纳米剂量计

DOI:
10.1039/c2sc21485g
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发表时间:
2013
期刊:
影响因子:
8.4
通讯作者:
Han, Shoufa
Han, Shoufa
中科院分区:
化学1区
文献类型:
--
作者:
Wu, Xuanjun;Li, Zhu;Yang, Liu;Han, Jiahuai;Han, Shoufa

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次氯酸(HOCl)是由过氧化氢通过免疫细胞溶酶体中的髓过氧化物酶催化生物合成的。尽管被免疫系统利用来对抗入侵的病原体,但生物源HOCl也可以损害宿主组织,并且与许多疾病相关。在这篇边缘文章中,使用包含FITC(供体染料)和非荧光化学剂量计的二氧化硅纳米颗粒实现了溶酶体HOCl的基于福斯特共振能量转移的比率成像,所述非荧光化学剂量计在HOCl触发的串联氧化和掺杂化学剂量计的β-消除后转化为罗丹明(受体染料)。相对于基于小分子的游离化学剂量计,纳米剂量计表现出不同的生物化学性质,例如溶酶体归巢特异性和与水性介质的相容性,使得能够通过常规流式细胞术容易地监测溶酶体HOCl。该纳米探针将具有广泛的用途,用于研究活细胞或甚至动物中溶酶体HOCl的体内生成和影响。
Hypochlorous acid (HOCl) is biosynthesized from hydrogen peroxide via catalysis of myeloperoxidase in lysosomes of immunological cells. Despite being harnessed by immune systems against invading pathogens, biogenic HOCl can also damage host tissues and has been associated with a number of diseases. In this edge article, Forster resonance energy transfer based ratiometric imaging of lysosomal HOCl was achieved with silica nanoparticles comprising FITC (donor dye) and a nonfluorescent chemodosimeter which turned into rhodamine (acceptor dye) upon HOCl triggered tandem oxidation and β-elimination of the doped chemodosimeter. The nanodosimeter exhibited distinct biochemical properties relative to small molecule-based free chemodosimeters, e.g. lysosome-homing specificity and compatibility with aqueous media, enabling facile monitoring of lysosomal HOCl by conventional flow cytometry. The nanoprobe would be of broad utility for studies on in vivo generation and the impact of lysosomal HOCl in living cells or even in animals.
DOI: 10.1016/s0021-9258(17)33749-3
发表时间: 1976-03
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