Bright and stable near-infrared fluorescent protein for in vivo imaging.

Bright and stable near-infrared fluorescent protein for in vivo imaging.
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DOI:
10.1038/nbt.1918
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发表时间:
2011-07-17
影响因子:
46.9
通讯作者:
Verkhusha, Vladislav V.
Verkhusha, Vladislav V.
中科院分区:
工程技术1区
文献类型:
--
作者:
Filonov, Grigory S.;Piatkevich, Kiryl D.;Ting, Li-Min;Zhang, Jinghang;Kim, Kami;Verkhusha, Vladislav V.

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The ability of non-invasive monitoring of deep-tissue developmental, metabolic, and pathogenic processes will advance modern biotechnology. Imaging of live mammals using fluorescent probes is more feasible within a “near-infrared optical window” (NIRW). Here we report a phytochrome-based near infra-red fluorescent protein (iRFP) with the excitation/emission maxima at 690/713 nm. Bright fluorescence in a living mouse proved iRFP to be a superior probe for non-invasive imaging of internal mammalian tissues. Its high intracellular stability, low cytotoxicity, and lack of the requirement to add external biliverdin-chromophore makes iRFP as easy to use as conventional GFP-like proteins. Compared to earlier phytochrome-derived fluorescent probes, the iRFP protein has better in vitro characteristics and performs well in cells and in vivo, having greater effective brightness and photostability. Compared to the far-red GFP-like proteins, iRFP has substantially higher signal to background ratio in a mouse model owing to its infra-red shifted spectra.
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