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3D printed microfluidic devices for lipid bilayer recordings.

Kazuto Ogishi1, Toshihisa Osaki2,3, Yuya Morimoto1

  • 1Graduate School of Information Science and Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan. takeuchi@hybrid.t.u-tokyo.ac.jp.

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Summary

This study demonstrates 3D printing of lipid bilayer devices using stereolithography for membrane protein analysis. Material properties like surface smoothness and hydrophobicity are key for successful fabrication and reproducible results.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Analytical Chemistry

Background:

  • Lipid bilayer devices are crucial for in vitro hosting of membrane proteins in biological assays and sensing.
  • There is a significant demand for rapid fabrication of functional lipid bilayer devices.
  • Monolithic fabrication using 3D printing is a promising approach, but material requirements for reproducible lipid bilayer formation are not well understood.

Purpose of the Study:

  • To investigate the feasibility of fabricating lipid bilayer devices via stereolithography for membrane protein measurements.
  • To identify critical material properties influencing successful lipid bilayer formation using 3D printing.

Main Methods:

  • Stereolithography was employed for single-step, monolithic fabrication of 3D structural lipid bilayer devices.
  • 3D printing materials were characterized to determine their suitability for lipid bilayer formation.
  • Performance of 3D printed devices was compared to conventionally fabricated devices.

Main Results:

  • Surface smoothness and hydrophobicity of 3D printed materials were identified as critical factors for successful lipid bilayer formation.
  • The fabricated devices exhibited comparable measurement performance to conventional methods, including low noise amplitude and short lipid bilayer formation times.
  • The technology demonstrated extendibility for device functionalization, including integrated microfluidic channels and multi-chamber arrays.

Conclusions:

  • Stereolithography enables the single-step, monolithic fabrication of functional lipid bilayer devices.
  • Material surface properties are critical determinants for reproducible lipid bilayer formation in 3D printed devices.
  • This 3D printing approach offers a scalable and versatile platform for developing advanced lipid bilayer devices for various applications.