| Literature DB >> 22891300 |
Sang-Hee Shim1, Chenglong Xia, Guisheng Zhong, Hazen P Babcock, Joshua C Vaughan, Bo Huang, Xun Wang, Cheng Xu, Guo-Qiang Bi, Xiaowei Zhuang.
Abstract
Imaging membranes in live cells with nanometer-scale resolution promises to reveal ultrastructural dynamics of organelles that are essential for cellular functions. In this work, we identified photoswitchable membrane probes and obtained super-resolution fluorescence images of cellular membranes. We demonstrated the photoswitching capabilities of eight commonly used membrane probes, each specific to the plasma membrane, mitochondria, the endoplasmic recticulum (ER) or lysosomes. These small-molecule probes readily label live cells with high probe densities. Using these probes, we achieved dynamic imaging of specific membrane structures in living cells with 30-60 nm spatial resolution at temporal resolutions down to 1-2 s. Moreover, by using spectrally distinguishable probes, we obtained two-color super-resolution images of mitochondria and the ER. We observed previously obscured details of morphological dynamics of mitochondrial fusion/fission and ER remodeling, as well as heterogeneous membrane diffusivity on neuronal processes.Mesh：
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Year: 2012 PMID： 22891300 PMCID： PMC3435176 DOI： 10.1073/pnas.1201882109
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205