Microelectromechanical Systems (MEMS)

Development of a bio-microelectromechanical system device for axonal extension evaluation by PC12D patterning using a dielectrophoresis method

[+] Author Affiliations
Eiji Nakamachi, Shinya Murakami, Hirotaka Koga, Yusuke Morita

Doshisha University, Department of Biomedical Engineering, 1-3 Miyakodani, Tatara, Kyotanabe City, Kyoto 610-0394, Japan

J. Micro/Nanolith. MEMS MOEMS. 14(2), 025004 (Jun 09, 2015). doi:10.1117/1.JMM.14.2.025004
History: Received February 11, 2015; Accepted May 12, 2015
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Abstract.  We developed a bio-microelectromechanical system (bio-MEMS) device by combining the dielectrophoresis (DEP) method and MEMS technology that to trap a single PC12D (rat phenocromocytoma cell) for cell pattern formation to measure the axonal extension function. Our device could trap PC12Ds to assign bicells, with designed distances between two cells of 100, 200, and 300μm. PC12Ds were injected into our bio-MEMS device using a micropipette. We observed the axonal extension using a time-lapse microscope to study the effect of the bicell distance on the axonal extension and connection ability. An alternative electric field (frequency: 10 MHz, voltage: 5Vpp) was applied for the PC12D DEP patterning. To keep the patterned PC12Ds on the electrode holes, water was injected using a microsyringe to sweep out excess cells, which remained outside the holes. An average single PC12D pattern ratio of 89.3% was achieved. The axonal extension ability was affected by the cell distance. PC12D bicell distances of 100 and 200μm showed good connection ratios of 86.7% and 91.7%, respectively, where as a bicell distance of 300μm showed a low-connection ratio of about 40.0%. We confirmed the applicability of our bio-MEMS device to bicell patterning and evaluated the cell extension function.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Eiji Nakamachi ; Shinya Murakami ; Hirotaka Koga and Yusuke Morita
"Development of a bio-microelectromechanical system device for axonal extension evaluation by PC12D patterning using a dielectrophoresis method", J. Micro/Nanolith. MEMS MOEMS. 14(2), 025004 (Jun 09, 2015). ; http://dx.doi.org/10.1117/1.JMM.14.2.025004


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