標題: In situ laser micropatterning of proteins for dynamically arranging living cells
作者: Okano, Kazunori
Matsui, Ai
Maezawa, Yasuyo
Hee, Ping-Yu
Matsubara, Mie
Yamamoto, Hideaki
Hosokawa, Yoichiroh
Tsubokawa, Hiroshi
Li, Yaw-Kuen
Kao, Fu-Jen
Masuhara, Hiroshi
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 2013
摘要: This study shows the modification of the surface of polymer-layered glass substrates to form biofunctional micropatterns through femtosecond laser ablation in an aqueous solution. Domains of micrometer size on a substrate can be selectively converted from proteinphobic (resistant to protein adsorption) to proteinphilic, allowing patterning of protein features under physiological aqueous conditions. When femtosecond laser pulses (800 nm, 1 kHz, 200-500 nJ per pulse) were focused on and scanned on the substrate, which was glass covered with the proteinphobic polymer 2-methacryloyloxyethylphosphorylcholine (MPC), the surface became proteinphilic. Surface analysis by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) reveals that the laser ablates the MPC polymer. Extracellular matrix (ECM) proteins were bound to the laser-ablated surface by physisorption. Since femtosecond laser ablation is induced under physiological aqueous conditions, this approach can form micropatterns of functional ECM proteins with minimal damage. This method was applied to pattern collagen, laminin, and gelatin on the substrate. Removal of an ECM protein from the substrate followed by replacement with another ECM protein was achieved on demand at a specific location and time by the same laser ablation method. Living cells adhered to the fabricated domains where ECM proteins were arranged. The modification of patterning during cell culture was used to control cell migration and form arrays of different cells.
URI: http://hdl.handle.net/11536/22823
http://dx.doi.org/10.1039/c3lc50750e
ISSN: 1473-0197
DOI: 10.1039/c3lc50750e
期刊: LAB ON A CHIP
Volume: 13
Issue: 20
起始頁: 4078
結束頁: 4086
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