Label-Free Imaging of Membrane Potential Using Membrane Electromotility
Electrical activity may cause observable changes in a cell's structure in the absence of exogenous reporter molecules. In this work, we report a low-coherence interferometric microscopy technique that can detect an optical signal correlated with the membrane potential changes in individual mamm...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Elsevier
2014
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| Online Access: | http://hdl.handle.net/1721.1/91628 https://orcid.org/0000-0002-4568-3218 |
| _version_ | 1826211734479699968 |
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| author | Oh, Seungeun Fang-Yen, Chris Choi, Wonshik Yaqoob, Zahid Fu, Dan Park, YongKeun Dassari, Ramachandra R. Feld, Michael S. |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Oh, Seungeun Fang-Yen, Chris Choi, Wonshik Yaqoob, Zahid Fu, Dan Park, YongKeun Dassari, Ramachandra R. Feld, Michael S. |
| author_sort | Oh, Seungeun |
| collection | MIT |
| description | Electrical activity may cause observable changes in a cell's structure in the absence of exogenous reporter molecules. In this work, we report a low-coherence interferometric microscopy technique that can detect an optical signal correlated with the membrane potential changes in individual mammalian cells without exogenous labels. By measuring milliradian-scale phase shifts in the transmitted light, we can detect changes in the cells' membrane potential. We find that the observed optical signals are due to membrane electromotility, which causes the cells to deform in response to the membrane potential changes. We demonstrate wide-field imaging of the propagation of electrical stimuli in gap-junction-coupled cell networks. Membrane electromotility-induced cell deformation may be useful as a reporter of electrical activity. |
| first_indexed | 2024-09-23T15:10:36Z |
| format | Article |
| id | mit-1721.1/91628 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:10:36Z |
| publishDate | 2014 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/916282022-10-02T01:06:45Z Label-Free Imaging of Membrane Potential Using Membrane Electromotility Oh, Seungeun Fang-Yen, Chris Choi, Wonshik Yaqoob, Zahid Fu, Dan Park, YongKeun Dassari, Ramachandra R. Feld, Michael S. Massachusetts Institute of Technology. Department of Chemistry Massachusetts Institute of Technology. Spectroscopy Laboratory Yaqoob, Zahid Oh, Seungeun Fang-Yen, Chris Choi, Wonshik Fu, Dan Park, YongKeun Dassari, Ramachandra R. Feld, Michael S. Electrical activity may cause observable changes in a cell's structure in the absence of exogenous reporter molecules. In this work, we report a low-coherence interferometric microscopy technique that can detect an optical signal correlated with the membrane potential changes in individual mammalian cells without exogenous labels. By measuring milliradian-scale phase shifts in the transmitted light, we can detect changes in the cells' membrane potential. We find that the observed optical signals are due to membrane electromotility, which causes the cells to deform in response to the membrane potential changes. We demonstrate wide-field imaging of the propagation of electrical stimuli in gap-junction-coupled cell networks. Membrane electromotility-induced cell deformation may be useful as a reporter of electrical activity. National Science Foundation (U.S.) (DBI-0754339) National Center for Research Resources (U.S.) (P41-RR02594-24) Hamamatsu Corporation 2014-11-20T13:28:43Z 2014-11-20T13:28:43Z 2012-07 2011-09 Article http://purl.org/eprint/type/JournalArticle 00063495 1542-0086 http://hdl.handle.net/1721.1/91628 Oh, Seungeun, Christopher Fang-Yen, Wonshik Choi, Zahid Yaqoob, Dan Fu, YongKeun Park, Ramachandra R. Dassari, and Michael S. Feld. “Label-Free Imaging of Membrane Potential Using Membrane Electromotility.” Biophysical Journal 103, no. 1 (July 2012): 11–18. © 2012 Biophysical Society https://orcid.org/0000-0002-4568-3218 en_US http://dx.doi.org/10.1016/j.bpj.2012.05.020 Biophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Elsevier Elsevier |
| spellingShingle | Oh, Seungeun Fang-Yen, Chris Choi, Wonshik Yaqoob, Zahid Fu, Dan Park, YongKeun Dassari, Ramachandra R. Feld, Michael S. Label-Free Imaging of Membrane Potential Using Membrane Electromotility |
| title | Label-Free Imaging of Membrane Potential Using Membrane Electromotility |
| title_full | Label-Free Imaging of Membrane Potential Using Membrane Electromotility |
| title_fullStr | Label-Free Imaging of Membrane Potential Using Membrane Electromotility |
| title_full_unstemmed | Label-Free Imaging of Membrane Potential Using Membrane Electromotility |
| title_short | Label-Free Imaging of Membrane Potential Using Membrane Electromotility |
| title_sort | label free imaging of membrane potential using membrane electromotility |
| url | http://hdl.handle.net/1721.1/91628 https://orcid.org/0000-0002-4568-3218 |
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