Journal
ULTRASONICS
Volume 56, Issue -, Pages 160-171Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultras.2014.07.010
Keywords
Picosecond ultrasonics; Cell mechanics; Cell adhesion
Funding
- Agence Nationale de la Recherche [ANR-07-BLAN-0303, ANR-13-BS09-0021-01]
- Region Aquitaine
- competitiveness cluster Route des Lasers
- GIS Advanced Materials in Aquitaine
- Agence Nationale de la Recherche (ANR) [ANR-07-BLAN-0303, ANR-13-BS09-0021] Funding Source: Agence Nationale de la Recherche (ANR)
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The mechanical properties of cells play a key role in several fundamental biological processes, such as migration, proliferation, differentiation and tissue morphogenesis. The complexity of the inner cell composition and the intricate meshwork formed by transmembrane cell-substrate interactions demands a non-invasive technique to probe cell mechanics and cell adhesion at a subcell scale. In this paper we review the use of laser-generated GHz acoustic waves-a technique called picosecond ultrasonics (PU)-to probe the mechanical properties of single cells. We first describe applications to vegetal cells and biomimetic systems. We show how these systems can be used as simple models to understand more complex animal cells. We then present an opto-acoustic bio-transducer designed for in vivo measurements in physiological conditions. We illustrate the use of this transducer through the simultaneous probing of the density and compressibility of Allium cepa cells. Finally, we demonstrate that this technique can quantify animal-cell adhesion on metallic surfaces by analyzing the acoustic pulses reflected off the cell-metal interface. This innovative approach allows investigating quantitatively cell mechanics without fluorescent labels or mechanical contact to the cell. (C) 2014 Elsevier B.V. All rights reserved.
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