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Solid immersion microscopy images cells under cryogenic conditions with 12 nm resolution.
Communications Biology ( IF 5.2 ) Pub Date : 2019-02-21 , DOI: 10.1038/s42003-019-0317-6
Lin Wang 1 , Benji Bateman 1 , Laura C Zanetti-Domingues 1 , Amy N Moores 1 , Sam Astbury 1 , Christopher Spindloe 1 , Michele C Darrow 2 , Maria Romano 3, 4 , Sarah R Needham 1 , Konstantinos Beis 3, 4 , Daniel J Rolfe 1 , David T Clarke 1 , Marisa L Martin-Fernandez 1
Affiliation  

Super-resolution fluorescence microscopy plays a crucial role in our understanding of cell structure and function by reporting cellular ultrastructure with 20-30 nm resolution. However, this resolution is insufficient to image macro-molecular machinery at work. A path to improve resolution is to image under cryogenic conditions. This substantially increases the brightness of most fluorophores and preserves native ultrastructure much better than chemical fixation. Cryogenic conditions are, however, underutilised because of the lack of compatible high numerical aperture objectives. Here, using a low-cost super-hemispherical solid immersion lens (superSIL) and a basic set-up we achieve 12 nm resolution under cryogenic conditions, to our knowledge the best yet attained in cells using simple set-ups and/or commercial systems. By also allowing multicolour imaging, and by paving the way to total-internal-reflection fluorescence imaging of mammalian cells under cryogenic conditions, superSIL microscopy opens a straightforward route to achieve unmatched resolution on bacterial and mammalian cell samples.

中文翻译:

固态浸没显微镜在低温条件下以12 nm分辨率对细胞进行成像。

超分辨率荧光显微镜通过报告具有20-30 nm分辨率的细胞超微结构,在我们对细胞结构和功能的理解中起着至关重要的作用。但是,该分辨率不足以使工作中的大分子机械成像。提高分辨率的途径是在低温条件下成像。这大大增加了大多数荧光团的亮度,并保留了天然的超微结构,远胜于化学固定。但是,由于缺乏兼容的高数值孔径物镜,因此未充分利用低温条件。在这里,通过使用低成本的超半球形固体浸没透镜(superSIL)和基本设置,我们可以在低温条件下达到12 nm分辨率,据我们所知,使用简单的设置和/或商业系统在电池中所能达到的最好水平。
更新日期:2019-02-21
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