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Nanoplasmonic pillars engineered for single exosome detection
Exosomes are secreted nanovesicles which incorporate proteins and nucleic acids, thereby enabling multifunctional pathways for intercellular communication. There is an increasing appreciation of the critical role they play in fundamental processes such as development, wound healing and disease progr...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6108516/ https://www.ncbi.nlm.nih.gov/pubmed/30142169 http://dx.doi.org/10.1371/journal.pone.0202773 |
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author | Raghu, Deepa Christodoulides, Joseph A. Christophersen, Marc Liu, Jinny L. Anderson, George P. Robitaille, Michael Byers, Jeff M. Raphael, Marc P. |
author_facet | Raghu, Deepa Christodoulides, Joseph A. Christophersen, Marc Liu, Jinny L. Anderson, George P. Robitaille, Michael Byers, Jeff M. Raphael, Marc P. |
author_sort | Raghu, Deepa |
collection | PubMed |
description | Exosomes are secreted nanovesicles which incorporate proteins and nucleic acids, thereby enabling multifunctional pathways for intercellular communication. There is an increasing appreciation of the critical role they play in fundamental processes such as development, wound healing and disease progression, yet because of their heterogeneous molecular content and low concentrations in vivo, their detection and characterization remains a challenge. In this work we combine nano- and microfabrication techniques for the creation of nanosensing arrays tailored toward single exosome detection. Elliptically–shaped nanoplasmonic sensors are fabricated to accommodate at most one exosome and individually imaged in real time, enabling the label-free recording of digital responses in a highly multiplexed geometry. This approach results in a three orders of magnitude sensitivity improvement over previously reported real-time, multiplexed platforms. Each nanosensor is elevated atop a quartz nanopillar, minimizing unwanted nonspecific substrate binding contributions. The approach is validated with the detection of exosomes secreted by MCF7 breast adenocarcinoma cells. We demonstrate the increasingly digital and stochastic nature of the response as the number of subsampled nanosensors is reduced from four hundred to one. |
format | Online Article Text |
id | pubmed-6108516 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-61085162018-09-18 Nanoplasmonic pillars engineered for single exosome detection Raghu, Deepa Christodoulides, Joseph A. Christophersen, Marc Liu, Jinny L. Anderson, George P. Robitaille, Michael Byers, Jeff M. Raphael, Marc P. PLoS One Research Article Exosomes are secreted nanovesicles which incorporate proteins and nucleic acids, thereby enabling multifunctional pathways for intercellular communication. There is an increasing appreciation of the critical role they play in fundamental processes such as development, wound healing and disease progression, yet because of their heterogeneous molecular content and low concentrations in vivo, their detection and characterization remains a challenge. In this work we combine nano- and microfabrication techniques for the creation of nanosensing arrays tailored toward single exosome detection. Elliptically–shaped nanoplasmonic sensors are fabricated to accommodate at most one exosome and individually imaged in real time, enabling the label-free recording of digital responses in a highly multiplexed geometry. This approach results in a three orders of magnitude sensitivity improvement over previously reported real-time, multiplexed platforms. Each nanosensor is elevated atop a quartz nanopillar, minimizing unwanted nonspecific substrate binding contributions. The approach is validated with the detection of exosomes secreted by MCF7 breast adenocarcinoma cells. We demonstrate the increasingly digital and stochastic nature of the response as the number of subsampled nanosensors is reduced from four hundred to one. Public Library of Science 2018-08-24 /pmc/articles/PMC6108516/ /pubmed/30142169 http://dx.doi.org/10.1371/journal.pone.0202773 Text en https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication. |
spellingShingle | Research Article Raghu, Deepa Christodoulides, Joseph A. Christophersen, Marc Liu, Jinny L. Anderson, George P. Robitaille, Michael Byers, Jeff M. Raphael, Marc P. Nanoplasmonic pillars engineered for single exosome detection |
title | Nanoplasmonic pillars engineered for single exosome detection |
title_full | Nanoplasmonic pillars engineered for single exosome detection |
title_fullStr | Nanoplasmonic pillars engineered for single exosome detection |
title_full_unstemmed | Nanoplasmonic pillars engineered for single exosome detection |
title_short | Nanoplasmonic pillars engineered for single exosome detection |
title_sort | nanoplasmonic pillars engineered for single exosome detection |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6108516/ https://www.ncbi.nlm.nih.gov/pubmed/30142169 http://dx.doi.org/10.1371/journal.pone.0202773 |
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