Abstract
We designed and fabricated silicon probe with nanophotonic force sensor to directly stimulate neurons (PC12) and measured its effect on neurite initiation and elongation. A single-layer pitch-variable diffractive nanogratings was fabricated on silicon nitride probe using e-beam lithography, reactive ion etching and wet-etching techniques. The nanogratings consist of flexure folding beams suspended between two parallel cantilevers of known stiffness. The probe displacement, therefore the force, can be measured through grating transmission spectrum. We measured the mechanical membrane characteristics of PC12 cells using the force sensors with displacement range of 10 μm and force sensitivity 8 μN/μm. Young’s moduli of 425 ± 30 Pa are measured with membrane deflection of 1% for PC12 cells cultured on polydimethylsiloxane (PDMS) substrate coated with collagen or laminin in Ham’s F-12K medium. In a series of measurements, we have also observed stimulation of directed neurite contraction up to 6 μm on extended probing for a time period of 30 min. This method is applicable to measure central neurons mechanics under subtle tensions for studies on development and morphogenesis. The close synergy between the nano-photonic measurements and neurological verification can improve our understanding of the effect of external conditions on the mechanical properties of cells during growth and differentiation.
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References
G. Bao, S. Suresh, Nat. Mater. 2, 715–725 (2003)
N. Basso, J.N.M. Heersche, Bone. 30, 347–351 (2002)
A.R. Bausch, F. Ziemann et al., Biophys. J. 75, 2038–2049 (1998)
M.W. Berns, Sci. Am. 278, 52–7 (1998)
D. Bray, Dev. Biol. 102, 379–389 (1984)
W.M. Cowan, J.W. Fawcett et al., Science. 225, 1258–1265 (1984)
T.J. Dennerll, J. Cell. Biol. 107, 665–674 (1988)
N. DePaola, P.F. Davies et al., Proc. Natl. Acad. Sci. U. S. A. 96, 3154 (1999)
D.E. Discher, P. Janmey, et al., 310, 1139–1143 (2005)
J.W. Goodman, Introduction to Fourier optics (Roberts & Co 2005)
A. Gopal, Z. Luo, et al., Solid-state sensors, actuators and microsystems conference, 2007. TRANSDUCERS 2007. International, 1239–1242 (2007)
J. Guck, R. Ananthakrishnan et al., Biophys. J. 81, 767–784 (2001)
K. Hane, T. Endo et al., Sens Actuators: A. Physical. 97, 139–146 (2002)
R.M. Hochmuth, J. Biomech. 33, 15–22 (2000)
S.B. Kater, M.P. Mattson et al., Trends. Neurosci. 11, 315–21 (1988)
WCSSG. Kim, G. Barbastathis, J. Microelectromechanical Syst. 15, 763–769 (2006)
P. Lamoureux, J. Zheng et al., J. Cell. Biol. 118, 655–661 (1992)
A.I. Lur’e Three-dimensional problems of the theory of elasticity (Interscience Publishers 1964)
A.B. Mathur, G.A. Truskey et al., Biophys. J. 78, 1725–1735 (2000)
M. Matsuzaki, N. Honkura et al., Nature. 429, 761–766 (2004)
T. Mitchison, M. Kirschner, Neuron. 1, 761–72 (1988)
A.W. Moore, L.Y. Jan et al., Hamlet, a binary genetic switch between single- and multiple-dendrite neuron morphology Science 297, 1355–1358 (2002)
V. Nesterov, U. Brand. The nonlinear mechanical and elastrical properties of silicon 3D micro probes, euspen. (2004)
V. Nesterov, U. Brand, J. Micromechanics Microengineering. 15, 514–520 (2005)
V. Nesterov, U. Brand, J. Micromechanics Microengineering. 16, 1116–1127 (2006)
D. Purves, J.W. Lichtman, Science. 210, 153–157 (1980)
M. Radmacher, M. Fritz et al., Biophys. J. 70, 556–567 (1996)
S.D. Senturia Microsystem Design (Kluwer Academic Publishers 2001)
A.S. Tischler, L. Greene, Proc. Natl. Acad. Sci. USA. 73, 2424–2428 (1976)
L. You, S.C. Cowin et al., J. Biomech. 34, 1375–1386 (2001)
X. Zhang, C.C. Chen et al., J. Microelectromechanical Syst. 14, 1187–1197 (2005)
X. Zhang, M.P. Scott, et al., J. Microelectro. Mech. Syst. 15 (2006)
J. Zheng, P. Lamoureux et al., J. Neurosci. 11, 1117–1125 (1991)
Acknowledgments
We would like to thank Microelectronics Research Center (MRC) and the Center for Nano and Molecular Science and Technology (CNM) at UT Austin for providing the microfabrication facilities. This study was supported in part by the National Science Foundation Nanoscale Exploratory Research Program (ECS-0609413).
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Gopal, A., Luo, Z., Lee, J.Y. et al. Nano-opto-mechanical characterization of neuron membrane mechanics under cellular growth and differentiation. Biomed Microdevices 10, 611–622 (2008). https://doi.org/10.1007/s10544-008-9172-9
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DOI: https://doi.org/10.1007/s10544-008-9172-9