Label‐Free Tracking of Single Organelle Transportation in Cells with Nanometer Precision Using a Plasmonic Imaging Technique |
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| Authors: | Yunze Yang Hui Yu Xiaonan Shan Wei Wang Xianwei Liu Shaopeng Wang Nongjian Tao |
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| Affiliation: | 1. Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona, USA;2. School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona, USA;3. State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China |
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| Abstract: | Imaging and tracking of nano‐ and micrometer‐sized organelles in cells with nanometer precision is crucial for understanding cellular behaviors at the molecular scale. Because of the fast intracellular dynamic processes, the imaging and tracking method must also be fast. In addition, to ensure that the observed dynamics is relevant to the native functions, it is critical to keep the cells under their native states. Here, a plasmonics‐based imaging technique is demonstrated for studying the dynamics of organelles in 3D with high localization precision (5 nm) and temporal (10 ms) resolution. The technique is label‐free and can track subcellular structures in the native state of the cells. Using the technique, nanometer steps of organelle (e.g., mitochondria) transportation are observed along neurite microtubules in primary neurons, and the 3D structure of neurite microtubule bundles is reconstructed at the nanometer scale from the tracks of the moving organelles. |
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| Keywords: | 3D tracking intracellular organelle detection microtubule structure mapping plasmonic imaging surface plasmon resonance single‐cell tracking |
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